KR20160130145A - Organic light emitting device - Google Patents

Abstract

Disclosed is an organic light-emitting device including: a first electrode; a second electrode; a light-emitting layer interposed between the first electrode and the second electrode; and a hole transfer region between the first electrode and the light-emitting layer. According to the present invention, the organic light-emitting device has low driving voltage, high efficiency, and long lifespan.

Description

[0001] The present invention relates to an organic light emitting device,

And an organic light emitting device.

The organic light emitting device is a self light emitting type device having a wide viewing angle, excellent contrast, fast response time, excellent luminance, driving voltage and response speed characteristics, and multi-coloring.

A hole transport region, an emission layer, an electron transport region, and a second electrode are sequentially formed on the first electrode in the organic light emitting device. Lt; / RTI > structure. The holes injected from the first electrode migrate to the light emitting layer via the hole transporting region and electrons injected from the second electrode migrate to the light emitting layer via the electron transporting region. The carriers such as holes and electrons recombine in the light emitting layer region to generate excitons. This exciton changes from the excited state to the ground state and light is generated.

To provide an organic light emitting device having a low driving voltage, a high efficiency and a long life, and an improved low voltage efficiency.

According to one aspect,

A first electrode;

A second electrode;

An emission layer between the first electrode and the second electrode; And

And a hole transporting region between the first electrode and the light emitting layer,

Wherein the hole transporting region comprises a first compound represented by the following Formula 1 and a second compound represented by the following Formula 2:

≪ Formula 1 >

(2)

Among the above general formulas (1) and (2)

X ₁ and X ₂ are independently selected from N, B and P;

Y ₁ is selected from O, S and _{N [(L 11) a11 -R} 14], Y 2 is selected from O, S and _{N [(L 12) a12 -R} 15];

L ₁ to L ₄ , L ₁₁ and L ₁₂ each independently represent a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene groups, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenylene groups, substituted or unsubstituted C ₆ -C ₆₀ arylene groups, substituted or unsubstituted C ₁ -C ₆₀ hetero Substituted or unsubstituted divalent non-aromatic condensed polycyclic group and a substituted or unsubstituted divalent non-aromatic heterocyclic polycyclic group (substituted or unsubstituted divalent non- aromatic condensed heteropolycyclic group, wherein L < ₄ > is not a substituted or unsubstituted carbazolylene group;

a1 to a4, a11 and a12 are each independently selected from integers from 0 to 3;

Ar ₁ and Ar ₂ are, independently of each other, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group , A substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₁ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent Selected from a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, wherein the substituted or unsubstituted monovalent non-aromatic condensed polycyclic group Ar ₂ in Formula (2) is not a substituted or unsubstituted carbazolyl group;

R ₁ to R ₈ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, the acid or its salt, a sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₂ -C ₆₀ alkenyl group, a substituted or unsubstituted C ₂ -C ₆₀ A substituted or unsubstituted C ₁ -C ₁₀ alkoxy group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₁ -C ₁₀ heteroaryl cycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, a substituted or unsubstituted C ₆ -C ₆₀ arylthio group, a substituted or unsubstituted C ₁ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed A ring group, a substituted or unsubstituted 1, a non-aromatic heterocyclic is selected from a condensed polycyclic group, and _{-Si (Q 1) (Q 2} ) (Q 3);

R ₁₁ to R ₁₅ independently represent a substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted Or an unsubstituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₁ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic heterocyclic polycyclic group;

b1, b4, b5 and b7 are each independently selected from integers from 1 to 4;

b2, b3, b6 and b8 are each independently selected from integers from 1 to 3;

The substituted C ₃ -C ₁₀ cycloalkyl, substituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted C ₃ -C ₁₀ cycloalkenyl group, a substituted C ₁ -C ₁₀ heteroaryl cycloalkenyl group, a substituted C ₆ - C ₆₀ aryl group, a substituted C ₁ -C ₆₀ heteroaryl groups, substituted monovalent non-aromatic condensed polycyclic group, a substituted monovalent non-aromatic heterocyclic condensed polycyclic group, a substituted C ₁ -C ₆₀ alkyl group, a substituted A C ₂ -C ₆₀ alkenyl group, a substituted C ₂ -C ₆₀ alkynyl group, a substituted C ₁ -C ₆₀ alkoxy group, a substituted C ₃ -C ₁₀ cycloalkyl group, a substituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted Substituted C ₃ -C ₁₀ cycloalkenyl groups, substituted C ₁ -C ₁₀ heterocycloalkenyl groups, substituted C ₆ -C ₆₀ aryl groups, substituted C ₆ -C ₆₀ aryloxy groups, substituted C ₆ -C ₆₀ At least one of the substituents of the substituted monovalent non-aromatic heterocyclic polycyclic group, the arylthio group, the substituted C ₁ -C ₆₀ heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group and the substituted monovalent non-

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ - C ₆₀ aryloxy group (aryloxy), C ₆ -C ₆₀ arylthio group (arylthio), C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic group and a fused polycyclic- A C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group substituted with at least one of Si (Q ₁₁ ) (Q ₁₂ ) (Q ₁₃ );

C ₃ -C ₁₀ cycloalkyl, C ₁ -C ₁₀ heterocycloalkyl, C ₃ -C ₁₀ cycloalkenyl, C ₁ -C ₁₀ heterocycloalkenyl, C ₆ -C ₆₀ aryl, C ₆ -C ₆₀ aryl A C ₆ -C ₆₀ arylthio group, a C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group and a monovalent non-aromatic heterocyclic polycyclic group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group, a C ₁ -C ₆₀ alkoxy group, a C ₃ -C ₁₀ cycloalkyl group, a C ₁ -C ₁₀ heterocycloalkyl group , C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come T, C ₁ -C ₆₀ hetero aryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic group and the condensed polycyclic _{-Si (Q 21) (Q 22} ) (Q 23) of the at least one substituted, C ₃ -C ₁₀ cycloalkyl alkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy group, C ₆ - Import C ₆₀ aryl T, C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic is fused A ring group and a monovalent non-aromatic heterocyclic polycyclic group; And

_{-Si (Q 31) (Q 32} ) (Q 33); ;

Wherein Q ₁ to Q ₃ , Q ₁₁ to Q ₁₃ , Q ₂₁ to Q ₂₃ and Q ₃₁ to Q ₃₃ are each independently selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkenyl group, C ₁ -C ₆ alkenyl group, C ₁ -C ₆ alkenyl group, C ₁ -C ₆ alkenyl group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, C ₂ -C ₁₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heterocycloalkenyl group , A C ₆ -C ₆₀ aryl group, a C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic heterocyclic polycyclic group.

The organic light emitting device has a low driving voltage, a high efficiency and a long life, and the low voltage efficiency is improved.

1 schematically shows a cross-sectional view of an organic light emitting device 10 according to an embodiment of the present invention.

1 schematically shows a cross-sectional view of an organic light emitting device 10 according to an embodiment of the present invention. The organic light emitting device 10 includes a first electrode 110, a hole transporting region 130, a light emitting layer 150, an electron transporting region 170, and a second electrode 190. Here, the first electrode 110 may be an anode, and the second electrode 190 may be a cathode.

Hereinafter, a structure and a manufacturing method of an organic light emitting diode according to an embodiment of the present invention will be described with reference to FIG.

A substrate may be further disposed below the first electrode 110 or over the second electrode 190 of FIG. The substrate may be a glass substrate or a transparent plastic substrate having excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and waterproofness.

The first electrode 110 may be formed, for example, by providing a first electrode material on the substrate using a deposition method, a sputtering method, or the like. When the first electrode 110 is an anode, the first electrode material may be selected from materials having a high work function to facilitate hole injection. The first electrode 110 may be a reflective electrode, a transflective electrode, or a transmissive electrode. As the material for the first electrode, indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO ₂ ), zinc oxide (ZnO) and the like which are transparent and excellent in conductivity can be used. (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), or the like is used as the first electrode material for forming the first electrode 110 which is a translucent electrode or a reflective electrode. ), Magnesium-indium (Mg-In), and magnesium-silver (Mg-Ag).

The first electrode 110 may have a single layer or a multilayer structure having a plurality of layers. For example, the first electrode 110 may have a three-layer structure of ITO / Ag / ITO, but the present invention is not limited thereto.

A hole transporting region 130, a light emitting layer 150, and an electron transporting region 170 are sequentially stacked on the first electrode 110.

The hole transporting region 130 comprises a first compound represented by the following Formula 1 and a second compound represented by the following Formula 2:

≪ Formula 1 >

(2)

In the general formulas (1) and (2), X ₁ and X ₂ may be independently selected from N, B and P.

For example, in the above formulas (1) and (2), X ₁ and X ₂ may be N.

In Formula _1, Y 1 is selected from O, S and _{N [(L 11) a11 -R} 14], Y 2 may be selected from O, S and _{N [(L 12) a12 -R} 15] .

For example, Y ₁ and Y ₂ may be the same or different from each other.

According to another embodiment, Y ₁ and Y ₂ may be the same as each other.

According to another embodiment, Y ₁ = Y ₂ = O, or Y ₁ = Y ₂ = S.

L ₁₁ , L ₁₂ , a ₁₁ , a ₁₂ , R ₁₄ and R ₁₅ refer to the following.

L ₁ to L ₄ , L ₁₁ and L ₁₂ in the general formulas (1) and (2) are a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkylene group, unsubstituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₁ -C ₁₀ heteroaryl cycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₁ - C ₆₀ heteroaryl group, an unsubstituted 2-substituted or unsubstituted non-aromatic condensed polycyclic group (substituted or unsubstituted divalent non-aromatic condensed polycyclic group) and a substituted or unsubstituted divalent non-aromatic hydrocarbon ring condensed polycyclic group (substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group, and L < ₄ > in the above formula (2) may be a substituted or unsubstituted carbazolylene group.

For example, L &_lt; ₁ > to L &_lt; ₄ > in Formula 2 may be independently a substituted or unsubstituted carbazolylene group.

For example, in the above formulas (1) and (2), L ₁ to L ₄ , L ₁₁ and L ₁₂ ,

A phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, A phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, , Anthracenylene, fluoranthenylene, triphenylenylene, pyrenylene, chrysenylene, naphthacenylene, picenylene, and the like. Perylene, pentaphenylene, hexacenylene, pentacenylene, rubicenylene, coronenylene, and ovalenyl (hereinafter referred to as "ovalenyl"), perylenylene, pentaphenylene, pentacenylene, pentacenylene, Ovalenylene, thiophenylene group ( a thiophenylene group, a furanylene group, a carbazolylene group, a benzofuranylene group, a benzothiophenylene group, a dibenzofuranylene group, a dibenzothiophenylene group, , Benzocarbazolylene group and dibenzocarbazolylene group; And

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₁ -C ₂₀ alkyl, C ₁ -C ₂₀ alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pen Frontale group, an indenyl group, a naphthyl group , An azulenyl group, an heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, A perylene group, a perylene group, a perylene group, a perylene group, a perylene group, a perylene group, a perylene group, a perylene group, An ovalenyl group, a thiophenyl group, a furanyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group A phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptarenylene group, a dibenzothiophenyl group, a dibenzothiophenyl group, a benzocarbazolyl group and a dibenzocarbazolyl group, , A phenanthrenylene group, a phenanthrenylene group, an anthracenylene group, a fluoroalkylene group, a phenanthrenylene group, an anthracenylene group, an anthracenylene group, an anthracenylene group, a fluorenylene group, A naphthacenylene group, a pentalenylene group, a perylenylene group, a pentaphenylene group, a hexacenylene group, a pentacenylene group, a rubicecylene group, a coronenylene group, a pyrenylene group, a pyrenylene group, , Ovalenylene group, thiophenylene group, furanylene group, carbazolylene group, benzofuranylene group, benzothiophenylene group, dibenzofuranylene group, dibenzothiophenylene group, benzocarbazolylene group and dibenzocarbazolylene group ; ≪ / RTI >

According to another embodiment, L ₁ to L ₄ , L ₁₁ and L ₁₂ in the general formulas (1) and (2)

A phenylene group, a phenylene group, a phenylene group, a naphthylene group, a fluorenylene group, a spiro-fluorenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, A rhenylene group and a dibenzothiophenylene group; And

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, Naphthylene group, fluorenyl group substituted with at least one of -Si (Q ₃₁ ) (Q ₃₂ ) (Q ₃₃ ), a phenylene group, a pyrenyl group, a chlorenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, Anthracenylene group, fluoranthenylene group, triphenylenylene group, pyrenylene group, klychenylene group, dibenzopureanylene group, and dibenzothiophenylene group; ≪ / RTI >

The Q ₃₁ to Q ₃₃ may be independently selected from a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, and a naphthyl group.

According to another embodiment, L ₁ to L ₄ , L ₁₁ and L ₁₂ in the general formulas (1) and (2)

May be selected from the groups represented by the following formulas (3-1) to (3-11), but are not limited thereto:

Among the above-mentioned formulas (3-1) to (3-11)

Y ₁ is selected from O, S, C (Z ₃ ) (Z ₄ ) and N (Z ₅ );

Z ₁ to Z ₅ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, A sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group , A dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a klycenyl group,

d1 is selected from an integer of 1 to 4, d2 is selected from an integer of 1 to 3, d3 is selected from an integer of 1 to 6, d4 is selected from an integer of 1 to 8, Is selected from integers, and * and * are binding sites with neighboring atoms.

For example, in the above formulas 3-4 and 3-5, Y ₁ may be selected from O, S, C (Z ₃ ) (Z ₄ ). Wherein Z ₃ and Z ₄ refer to what is described herein.

According to another embodiment, in Formula 1 and _{2, * - (L 1)} a1 - * ' to _{* - (L 4) a4 -} *', * - (L 11) a11 - * ' and * - ( L _{12) a12} - * 'may be independently selected from a single bond, to groups of the formula 3-1 and 3-12 of each other:

In the above formulas (3-1) and (3-12), Z ₁ , Z ₂ , d ₁ and d ₂ refer to those described in the specification, and * and * 'are binding sites with neighboring atoms.

For example, in the general formulas (3-1) and (3-12), Z ₁ and Z ₂ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, A sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a thienyl group, A phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a klycenyl group, and d1 is selected from an integer of 1 to 4, and the substituent is selected from the group consisting of a halogen atom, a fluorenyl group, a spioro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, .

According to another embodiment, in the general formulas (1) and (2), L ₁ to L _4, L ₁₁ and L ₁₂ may be independently selected from the groups represented by the following general formulas (4-1) to

In the above formulas (4-1) to (4-17), * and * are binding sites with neighboring atoms.

In accordance with another embodiment, the formulas (1) and (2), wherein _{* - (L 1) a1 -} * ' to _{* - (L 4) a4 -} *', * - (L 11) a11 - * ' and * (L _{12) a12} - * 'may be independently selected from a single bond, to groups of the formula 4-1 and 4-18 of each other:

In the above formulas (4-1) and (4-18), * and * are bonding sites with neighboring atoms.

In the general formulas (1) and (2), a1 to a4, a11 and a12 may be independently selected from integers of 0 to 3.

a1 represents the number of L < ₁ > and may be an integer selected from 0 to 3; For example, when a1 in the formula 1 is 0, * - (L ₁ ) _a1 - * 'is a single bond, and when a1 is 2 or more, 2 or more L _{1 s} may be the same or different.

a2 to a4, a11 and a12 can be understood with reference to the description of a1 and the structures of the formulas (1) and (2).

For example, the sum of a1, a2 and a3 in the above formula (1) may be 1 or more.

According to another embodiment, the sum of a1, a2 and a3 in formula (1) may be one.

According to another embodiment, in Formula 1,

a1 = 1, a2 = 0, a3 = 0,

a1 = 0, a2 = 1, a3 = 0, or

a1 = 0, a2 = 0, and a3 = 1.

For example, in Formula 2,

a4 is selected from the integers of 0 to 2, and a11 and a12 may be independently selected from 0 and 1.

According to another embodiment, a4, a11 and a12 may be selected independently of one another from 0 and 1.

Wherein Ar ₁ and Ar ₂ are, independently of each other, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C _A substituted or unsubstituted C ₁ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₁ -C ₆₀ heteroaryl group, A substituted or unsubstituted monovalent non-aromatic condensed polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group (substituted or unsubstituted monovalent non-aromatic condensed polycyclic group) group, and Ar ₂ in the formula (2) may not be a substituted or unsubstituted carbazolyl group.

For example, in Formula 2, Ar ₁ and Ar ₂ may not be substituted or unsubstituted carbazolyl groups independently of each other.

For example, in the above formulas (1) and (2), Ar ₁ and Ar ₂ are, independently of each other,

A phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, An isothiazolyl group, an isoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyrazinyl group, a pyrimidinyl group, a pyrazinyl group, a pyrimidinyl group, A benzothiophenyl group, an isobenzothiazolyl group, an isobenzothiazolyl group, an isobenzothiazolyl group, an isobenzothiazolyl group, an imidazolyl group, an imidazolyl group, an imidazolyl group, A benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group and an imidazopyrimidinyl group; And

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, an isoxazolyl group, an isoxazolyl group, A pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, A benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, isobenzoxazole Group, an oxadiazole group, a triazinyl group, a dibenzo furanoid group, a dibenzo thiophenyl group, imidazole jopi piperidinyl group, at least one of the imidazo pyrimidinyl group and a _{-Si (Q 31) (Q 32} ) (Q 33) A phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, An isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyridyl group, a pyridyl group, a pyridyl group, a pyridyl group, a pyridyl group, A thiophene group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, A benzooxazolyl group, an isobenzoxazolyl group, an oxadi Sol group, triazinyl group, a dibenzo furanoid group, a dibenzo thiophenyl group, imidazole group and a piperidinyl jopi imidazo pyrimidinyl group; ;

Q ₃₁ to Q ₃₃ may be independently selected from a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, and a naphthyl group. In this case, Ar ₂ in Formula 2 may not be a carbazolyl group or a substituted carbazolyl group.

According to another embodiment, in the general formulas (1) and (2), Ar ₁ and Ar ₂ are, independently of each other,

A phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, an anthracenyl group, a phenanthrenyl group, a pyridinyl group, a pyrimidinyl group, A norbornyl group and a dibenzothiophenyl group; And

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₁ -C ₁₀ alkyl, C ₁ -C ₁₀ alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spy-fluorenyl group, benzo fluorenyl group, an anthracenyl group, phenanthryl A naphthyl group substituted with at least one of -Si (Q ₃₁ ) (Q ₃₂ ) (Q ₃₃ ), a thienyl group, a thienyl group, a thienyl group, a pyridinyl group, a pyrimidinyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, A fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, an anthracenyl group, a phenanthrenyl group, a pyridinyl group, a pyrimidinyl group, a triazinyl group, a dibenzofuranyl group and a dibenzothiophenyl group; ≪ / RTI >

Q ₃₁ to Q ₃₃ may be independently selected from a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, and a naphthyl group.

In the general formulas (1) and (2), R ₁ to R ₈ are, independently of each other,

A halogen atom, a hydroxyl group, a hydroxyl group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, A substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₂ -C ₆₀ alkenyl group, a substituted or unsubstituted C ₂ -C ₆₀ alkynyl group, a substituted or unsubstituted C ₁ -C ₆₀ alkenyl group, -C ₆₀ alkoxy group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted hwandoen C ₁ -C ₁₀ heteroaryl cycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, a substituted or unsubstituted C ₆ -C ₆₀ aryl thio group, a substituted or unsubstituted C ₁ -C ₆₀ heteroaryl group, a substituted or unsubstituted 1, a non-condensed polycyclic aromatic group, a substituted or unsubstituted 1 Non-can be selected from aromatic heterocyclic groups and fused polycyclic _{-Si (Q 1) (Q 2} ) (Q 3). For a description of Q ₁ through Q ₃ refer to what is described herein.

In the formula 1 and 2, R ₁₁ to R ₁₅ are, each independently, a substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₁ to each other - C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₁ -C ₁₀ heteroaryl cycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or An unsubstituted C ₁ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic heterocyclic polycyclic group.

For example, in the above formulas (1) and (2)

R ₁ to R ₈ are, independently of each other,

A halogen atom, a hydroxyl group, a hydroxyl group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, Phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;

A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylrenyl group, a pyrenyl group, , A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, An isoquinolyl group, an isoquinolyl group, an isoquinolyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, A benzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, an isoxazolyl group, an isoxazolyl group, A pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, A benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, isobenzoxazole Group, an oxadiazole group, a triazinyl group, a dibenzo furanoid group, a dibenzo thiophenyl group, imidazole jopi piperidinyl group, at least one of the imidazo pyrimidinyl group and a _{-Si (Q 31) (Q 32} ) (Q 33) A substituted or unsubstituted phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, , Pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl A quinolinyl group, a quinolyl group, a quinolinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, Diazo, isobenzoxazolyl, oxadiazolyl, triazinyl A dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group; And

_{-Si (Q 1) (Q 2} ) (Q 3); ;

R ₁₁ to R ₁₅ are, independently of each other,

A C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;

A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylrenyl group, a pyrenyl group, , A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, An isoquinolyl group, an isoquinolyl group, an isoquinolyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, A benzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, an isoxazolyl group, an isoxazolyl group, A pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, A benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, isobenzoxazole Group, an oxadiazole group, a triazinyl group, a dibenzo furanoid group, a dibenzo thiophenyl group, imidazole jopi piperidinyl group, at least one of the imidazo pyrimidinyl group and a _{-Si (Q 31) (Q 32} ) (Q 33) A substituted or unsubstituted phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, , Pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl A quinolinyl group, a quinolyl group, a quinolinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, Diazo, isobenzoxazolyl, oxadiazolyl, triazinyl A dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group; And

_{-Si (Q 1) (Q 2} ) (Q 3); ≪ / RTI >

The Q ₁ to Q ₃ and Q ₃₁ to Q ₃₃ may be independently selected from a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group and a naphthyl group.

According to another embodiment, in the above formulas (1) and (2), R ₁ to R ₈ independently of each other,

A halogen atom, a hydroxyl group, a hydroxyl group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, Phosphoric acid or a salt thereof, a C ₁ -C ₁₀ alkyl group and a C ₁ -C ₁₀ alkoxy group;

A phenanthrenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a crycenyl group, a carbazole group, a phenanthryl group, A diaryl group, a dibenzofuranyl group, and a dibenzothiophenyl group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A phenyl group, a naphthyl group, a fluoro group substituted with at least one of a salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group and -Si (Q ₃₁ ) (Q ₃₂ ) (Q ₃₃ ) Anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, carbazolyl group, dibenzofuranyl group and dibenzofuranyl group may be optionally substituted with at least one substituent selected from the group consisting of a halogen atom, A dibenzothiophenyl group; And

_{-Si (Q 1) (Q 2} ) (Q 3); ;

R ₁₁ to R ₁₅ are, independently of each other,

A C ₁ -C ₁₀ alkyl group and a C ₁ -C ₁₀ alkoxy group;

A phenanthrenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a crycenyl group, a carbazole group, a phenanthryl group, A diaryl group, a dibenzofuranyl group, and a dibenzothiophenyl group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A phenyl group, a naphthyl group, a fluoro group substituted with at least one of a salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group and -Si (Q ₃₁ ) (Q ₃₂ ) (Q ₃₃ ) Anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, carbazolyl group, dibenzofuranyl group and dibenzofuranyl group may be optionally substituted with at least one substituent selected from the group consisting of a halogen atom, A dibenzothiophenyl group; And

_{-Si (Q 1) (Q 2} ) (Q 3); ;

The Q ₁ to Q ₃ and Q ₃₁ to Q ₃₃ may be independently selected from a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group and a naphthyl group.

According to another embodiment, among the above formulas (1) and (2)

Ar ₁ and Ar ₂ are independently selected from the group of the following formulas (5-1) to (5-20)

R ₁ to R ₈ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, A salt thereof, an acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group and a group represented by the following formulas (5-1 to 5-12)

R ₁₁ to R ₁₅ independently of each other may be selected from the group consisting of a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group and groups represented by the following formulas (5-1) to (5-12)

In the above formulas 5-1 to 5-20

Y ₃₁ is selected from O, S, C (Z ₃₅ ) (Z ₃₆ ), N (Z ₃₇ ) and Si (Z ₃₈ ) (Z ₃₉ );

Z ₃₁ to Z ₃₉ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, Wherein R _{1 is} selected from the group consisting of an acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, A phenanthrenyl group, an anthracenyl group, a pyrenyl group, a klychenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, An isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group and a triazinyl group;

e1 is an integer of 1 to 5, e2 is an integer of 1 to 7, e3 is an integer of 1 to 3, e4 is an integer of 1 to 4, e5 is 1 or 2, e6 is an integer of 1 to 6 E7 is an integer of 1 to 9, and * is a binding site with neighboring atoms.

For example, in the above formulas 5-4 and 5-5, Y ₃₁ may be selected from O, S, C (Z ₃₅ ) (Z ₃₆ ) and Si (Z ₃₈ ) (Z ₃₉ ).

According to another embodiment, Ar ₁ and Ar ₂ in the general formulas ( ₁₎ and ( ₂₎ are selected from the group consisting of the following formulas (6-1) to (6-33)

R ₁ to R ₈ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, A salt thereof, an acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group and groups represented by the following formulas (6-1) to (6-29)

R ₁₁ to R ₁₅ independently of each other may be selected from the group consisting of a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group and groups represented by the following formulas (6-1) to (6-29)

In the above formulas (6-1) to (6-33), * denotes a bonding site with neighboring atoms.

According to another embodiment, Ar ₁ and Ar ₂ in the general formulas ( ₁₎ and ( ₂₎ are represented by the general formulas (6-1) to (6-14) Group,

R ₁ to R ₈ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, acid or its salt, a sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, C ₁ -C ₁₀ alkyl, C ₁ -C ₁₀ alkoxy group, formula 6-1 to 6-14, 6-16 to 6-18) and (formula 6-20 to 6-29,

R ₁₁ to R ₁₅ independently represent a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, the above-mentioned formulas 6-1 to 6-14, 6-16 to 6-18 and 6-20 to 6 -29. ≪ / RTI >

B1, b4, b5 and b7 in the general formulas (1) and (2) are independently selected from integers from 1 to 4;

b2, b3, b6 and b8 may be selected independently from each other and from an integer of 1 to 3.

In the general formulas (1) and (2), b1 represents the number of R ₁ , and when b1 is 2 or more, b1 of 2 or more may be the same or different. The description of b2 to b8 can be understood by referring to the description of b1 and the structures of the above formulas 1 and 2, respectively.

 According to one embodiment, the first compound may be represented by one of the following formulas 1-1 to 1-4:

≪ Formula 1-1 >

(1-2)

<Formula 1-3>

<Formula 1-4>

In the above formulas 1-1 to 1-4, X ₁ , L ₁ to L ₃ , a ₁ to a ₃ , Ar ₁ , R ₁₁ to R ₁₃ , R ₁ to R ₄ and b ₁ to b ₄ are as described in the specification .

For example, in the above formulas 1-1 to 1-4, a1 to a3 may independently be 0 or 1.

According to another embodiment, in the above formulas 1-1 to 1-4, a1 and a3 may be 0, and a2 may be 1.

According to another embodiment, the first compound may be represented by one of the following formulas (1-1) and (1-1):

&Lt; Formula 1-1 (1) >

&Lt; Formula 1-1 (2)

X ₁ , L ₁ , L ₃ , a ₁ , a ₃ , Ar ₁ , R ₁ to R ₄ , R ₁₃ and b ₁ to b _{4 in} the formulas 1-1 (1) and 1-1 (2) And R ₃₁ to R ₃₃ refer to the description of R ₁ described herein, b ₃₁ is selected from integers from 1 to 4, and b 32 and b 33 are each independently selected from integers from 1 to 5 have.

According to one embodiment, the second compound may be represented by one of the following formulas (2-1) to (2-3):

&Lt; Formula (2-1)

&Lt; Formula (2-2)

<Formula 2-3>

Of the above-mentioned Formulas 2-1 to 2-3, X ₂ , Y ₁ , Y ₂ , L ₄ , L ₁₁ , L ₁₂ , a 4, a11, a12, Ar ₂ , R ₅ to R ₈ , R ₁₄ , R _15, and b ₅ to b ₈ refer to what is described herein.

For example, Ar ₂ in the general formulas (2-1) to (2-3) is selected from the groups represented by the general formulas (6-1) to (6-14), (6-16) to Can be:

According to one embodiment, the first compound represented by Formula 1 is one of the following compounds 101 to 109, and the second compound represented by Formula 2 may be one of the following compounds 1 to 36, no:

Wherein the hole transporting region comprises a hole transporting layer and a hole transporting layer, the hole transporting layer comprises the first compound represented by Formula 1, and the hole transporting layer comprises the second compound represented by Formula 2 , It is possible to achieve an optimal recombination balance of holes and electrons, thereby contributing to improvement of the efficiency and lifetime of the organic light emitting device.

In another embodiment, the hole transport layer comprises a first compound represented by one of Formulas 1-1 and 1-4, and the hole-transporting layer comprises a second compound represented by one of Formulas 2-1 to 2-3, .

In another embodiment, the hole transport layer comprises a first compound represented by one of the formulas 1-1 (1) and 1-1 (2), and the hole-assist layer includes the compounds represented by Formulas 2-1 to 2-3 Lt; RTI ID = 0.0 &gt; 1 &lt; / RTI &gt;

In another embodiment, the hole transport layer comprises one of the compounds 101 to 109, and the hole assisting layer may comprise one of the compounds 1 to 27. [

In one embodiment, the hole-assist layer is disposed between the light-emitting layer 150 and the first electrode 110, the hole-transport layer is disposed between the hole-assist layer and the first electrode, May include a first compound represented by Formula 1, and the hole-assist layer may include a second compound represented by Formula 2. [

The hole-assist layer may directly contact the light-emitting layer.

The hole transport region 130 may include at least one of a hole injection layer (HIL), a buffer layer, and an electron blocking layer (EBL) in addition to the hole transport layer and the hole assist layer.

For example, the hole transporting region 130 may include a hole injection layer / a hole transporting layer / a hole transporting layer, a hole transporting layer / a hole transporting layer / a buffer layer / a hole transporting layer, a hole transporting layer / Auxiliary layer and hole transporting layer / buffer layer / hole supporting layer, but the present invention is not limited thereto.

When the hole transporting region includes a hole injection layer, a vacuum evaporation method, a spin coating method, a casting method, an LB method (Langmuir-Blodgett), an inkjet printing method, a laser printing method, a laser induced thermal imaging (LITI) The hole injection layer may be formed on the first electrode 110 by using various methods.

When forming the hole injection layer by vacuum deposition, the deposition conditions, for example, about 100 to a deposition temperature of about 500 ℃, about 10 ^-8 to about 10 ^{- 3} torr, and a degree of vacuum of about 0.01 to about 100 of ㅕ / sec in the deposition rate range, considering the compound for the hole injection layer to be deposited and the hole injection layer structure to be formed.

When the hole injection layer is formed by the spin coating method, the coating conditions include a compound for a hole injection layer to be deposited and a hole for formation to be formed within a range of a coating speed of about 2000 rpm to about 5000 rpm and a heat treatment temperature range of about 80 [ Can be selected in consideration of the injection layer structure.

The hole transport layer, the hole assisting layer, the buffer layer, and the electron blocking layer may be formed by a method of forming a hole injection layer.

The thickness of the hole transport region 130 may range from about 100 angstroms to about 10,000 angstroms, for example, from about 100 angstroms to about 1000 angstroms. When the hole transporting region 130 includes both the hole transporting layer and the hole supporting layer, the thickness of the hole transporting layer is about 50 Å to about 2000 Å, for example, about 100 Å to about 1500 Å, To about 2000 Angstroms, for example from about 20 Angstroms to about 2000 Angstroms. When the thickness of the hole transporting region 130, the hole transporting layer, and the hole transporting layer satisfy the above-described ranges, satisfactory hole transporting characteristics can be obtained without substantial increase in driving voltage.

The hole transporting region may contain at least one of m-MTDATA, TDATA, 2-TNATA, NPB, beta-NPB, TPD, Spiro-TPD, Spiro- NPB, alpha-NPB, TAPC, HMTPD , TCTA (4,4 ', 4 "-tris (N-carbazolyl) triphenylamine), Pani / DBSA (Polyaniline / Dodecylbenzenesulfonic acid: / Dodecylbenzenesulfonic acid), PEDOT / PSS (poly (3,4-ethylenedioxythiophene) / poly (4-styrenesulfonate) (Polyaniline / camphor sulfonic acid) and PANI / PSS (polyaniline) / poly (4-styrenesulfonate): polyaniline) / poly (4-styrenesulfonate)

In addition to the materials described above, the hole transporting region 130 may further include a charge-generating material for improving conductivity. The charge-generating material may be uniformly or non-uniformly dispersed within the hole transport region.

The charge-producing material may be, for example, a p-dopant. The p-dopant may be one of a quinone derivative, a metal oxide, and a cyano group-containing compound, but is not limited thereto. For example, non-limiting examples of the p-dopant include tetracyanoquinodimethane (TCNQ) and 2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinone di Quinone derivatives such as phosphorus (F4-TCNQ); Metal oxides such as tungsten oxide and molybdenum oxide; And the following compound HT-D1, but the present invention is not limited thereto.

<Compound HT-D1> <F4-TCNQ>

The hole transporting region may further include at least one of a buffer layer and an electron blocking layer in addition to the hole transporting layer and the hole blocking layer as described above. The buffer layer may compensate the optical resonance distance according to the wavelength of the light emitted from the light emitting layer to increase the light emission efficiency. As the material contained in the buffer layer, a material that can be included in the hole transporting region may be used. The electron blocking layer is a layer that prevents the injection of electrons from the electron transporting region.

Various methods such as vacuum deposition, spin coating, casting, LB method, inkjet printing, laser printing, laser induced thermal imaging (LITI) The light emitting layer 150 is formed. When the light emitting layer 150 is formed by the vacuum deposition method and the spin coating method, the deposition conditions and coating conditions of the first layer 150 refer to deposition conditions and coating conditions of the hole injection layer.

The light emitting layer 150 may include a host and a dopant.

The host may comprise at least one of the following TPBi, TBADN, ADN (also referred to as "DNA "), CBP, CDBP and TCP:

Alternatively, the host may include a compound represented by Formula 301 below.

&Lt; Formula 301 >

Ar ₃₀₁ - [(L ₃₀₁ ) _{xb 1} -R ₃₀₁ ] _{xb 2}

In Formula 301,

Ar _&lt;

And examples thereof include naphthalene, heptalene, fluorenene, spiro-fluorene, benzofluorene, dibenzofluorene, phenalene, phenanthrene, anthracene, But are not limited to, fluoranthene, triphenylene, pyrene, chrysene, naphthacene, picene, perylene, pentaphene, Indenoanthracene;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group, a C ₁ -C ₆₀ alkoxy group, a C ₃ -C ₁₀ cycloalkyl group, a C ₁ -C ₁₀ heterocycloalkyl group , C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryl giok group, C ₆ -C ₆₀ aryl giti import, C ₁ -C ₆₀ hetero aryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic group and the condensed polycyclic _{-Si (Q 301) (Q 302} ) (Q 303) ( Q ₃₀₁ to Q ₃₀₃ are the independently from each other, Heptalene, fluorene substituted with at least one selected from hydrogen, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₆ -C ₆₀ aryl group and a C ₁ -C ₆₀ heteroaryl group, , Spiro-fluorene, Ben Fluorene, dibenzo fluorene, page nalren, phenanthrene, anthracene, fluoranthene, triphenylene, pyrene, Cry Sen, naphthacene, pisen, perylene, penta pen and indeno anthracene; ;

For a description of L ₃₀₁ refer to the description of L ₁ herein;

R ₃₀₁ is

A C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;

A halogen atom, a hydroxyl group, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, Or a salt thereof, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, , group possess is, pyrimidinyl group, pyridyl group pyrazinyl, quinolinyl group, an isoquinolinium group, a quinoxalinyl group, a quinazolinyl group, a carbazole group and a triazinyl group optionally substituted with at least one selected from, C ₁ -C ₂₀ An alkyl group and a C ₁ -C ₂₀ alkoxy group;

A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a klychenyl group, a pyridinyl group, , A pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazole group and a triazinyl group; And

A halogen atom, a hydroxyl group, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, or a salt thereof, C ₁ -C ₂₀ alkyl, C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spy-fluorenyl group, a fluorenyl group benzo, dibenzo-fluorenyl group, a phenanthrenyl group, A pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group and a carbazolyl group; A phenanthrenyl group, an anthracenyl group, a pyrenyl group, a pyrenyl group, a thienyl group, a thienyl group, a thienyl group, a thienyl group, a thienyl group, a thienyl group, A benzyl group, a benzyl group, a benzyl group, a benzyl group, A pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazole group and a triazinyl group; ;

xb1 is selected from 0, 1, 2 and 3;

xb2 is selected from 1, 2, 3 and 4.

For example, in Formula 301,

L ₃₀₁ ,

A phenylene group, a phenanthrene group, an anthracenylene group, a pyrenylene group and a chrysene ring group; a phenylene group, a naphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, And

A halogen atom, a hydroxyl group, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, or a salt thereof, C ₁ -C ₂₀ alkyl, C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spy-fluorenyl group, a fluorenyl group benzo, dibenzo-fluorenyl group, a phenanthrenyl group, Naphthylene group, fluorenylene group, spiro-fluorenrenylene group, benzofluorenylene group, dibenzofluorenylenylene group, dibenzofluorenylene group, and dibenzofluorenylene group which are substituted with at least one selected from anthracenyl, pyrenyl and klycenyl, , Phenanthrenylene group, anthracenylene group, pyrenylene group and chrysenylene group; ;

R ₃₀₁ is

A C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;

A halogen atom, a hydroxyl group, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, At least one selected from the group consisting of a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a klycenyl group A substituted C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;

A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group and a klycenyl group; And

A halogen atom, a hydroxyl group, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, or a salt thereof, C ₁ -C ₂₀ alkyl, C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spy-fluorenyl group, a fluorenyl group benzo, dibenzo-fluorenyl group, a phenanthrenyl group, A phenanthryl group, a phenanthrenyl group, a phenanthrenyl group, a phenanthrenyl group, a phenanthrenyl group, a phenanthrenyl group, a phenanthrenyl group, a phenanthrenyl group, a phenanthrenyl group, a phenanthrenyl group, A cenyl group, a pyrenyl group and a crycenyl group; , But is not limited thereto.

For example, the host may comprise a compound represented by the formula &lt; RTI ID = 0.0 &gt; 301A &

&Lt; Formula 301A >

For a description of the substituents in the above formula (301A), reference is made to what is described herein.

The compound represented by Formula 301 may include, but is not limited to, at least one of the following compounds H1 to H42:

Alternatively, the host may include, but is not limited to, at least one of the following compounds H43 to H49:

The dopant in the light emitting layer may include at least one of a fluorescent dopant and a phosphorescent dopant.

The phosphorescent dopant may include an organometallic complex represented by the following formula (401): &lt; EMI ID =

&Lt; Formula 401 >

In the above formula (401)

M is selected from iridium (Ir), platinum (Pt), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb) and thorium (TM);

X ₄₀₁ to X ₄₀₄ independently of one another are nitrogen or carbon;

The A ₄₀₁ and A ₄₀₂ rings may be, independently of one another, substituted or unsubstituted benzene, substituted or unsubstituted naphthalene, substituted or unsubstituted fluorene, substituted or unsubstituted spirofluorene, substituted or unsubstituted indene Substituted or unsubstituted thiophenes, substituted or unsubstituted thiophenes, substituted or unsubstituted furan, substituted or unsubstituted imidazoles, substituted or unsubstituted pyrazoles, substituted or unsubstituted thiols, substituted or unsubstituted thiophenes, Substituted or unsubstituted thiazoles, substituted or unsubstituted isothiazoles, substituted or unsubstituted oxazoles, substituted or unsubstituted isoxazoles, substituted or unsubstituted pyridines, substituted or unsubstituted pyrazines, substituted or unsubstituted pyrimidines, Substituted or unsubstituted quinoxaline, substituted or unsubstituted quinazoline, substituted or unsubstituted quinazoline, substituted or unsubstituted quinazoline, substituted or unsubstituted quinazoline, substituted or unsubstituted quinazoline, substituted or unsubstituted quinazoline, Substituted or unsubstituted benzoimidazoles, substituted or unsubstituted benzofuran, substituted or unsubstituted benzothiophenes, substituted or unsubstituted isobenzothiophenes, substituted or unsubstituted benzothiophenes, substituted or unsubstituted benzothiophenes, Substituted or unsubstituted benzoxazole, substituted or unsubstituted benzoxazole, substituted or unsubstituted isobenzoxazole, substituted or unsubstituted triazole, substituted or unsubstituted oxadiazole, substituted or unsubstituted triazine, substituted or unsubstituted dibenzofuran, And substituted or unsubstituted dibenzothiophene;

The substituted benzene, substituted naphthalene, substituted fluorene, substituted spiro-fluorene, substituted indene, substituted pyrrole, substituted thiophene, substituted furan, substituted imidazole, substituted pyrazole, Substituted thiazoles, substituted thiazoles, substituted isothiazoles, substituted oxazoles, substituted isoxazoles, substituted pyridines, substituted pyrazines, substituted pyrimidines, substituted pyridazines, substituted quinolines, substituted isoquinolines, Substituted quinoxaline, substituted quinazoline, substituted carbazole, substituted benzoimidazole, substituted benzofuran, substituted benzothiophene, substituted isobenzothiophene, substituted benzoxazole, substituted iso At least one substituent of the benzooxazole, the substituted triazole, the substituted oxadiazole, the substituted triazine, the substituted dibenzofuran and the substituted dibenzothiophene,

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ - C ₆₀ aryloxy, C ₆ -C ₆₀ arylthio, C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non- - a fused polycyclic aromatic heterocyclic _{group, -N (Q 401) (Q} 402), -Si (Q 403) (Q 404) (Q 405) and _{-B (Q 406) (Q 407} ) of the at least one substituted, C _A C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;

C ₃ -C ₁₀ cycloalkyl, C ₁ -C ₁₀ heterocycloalkyl, C ₃ -C ₁₀ cycloalkenyl, C ₁ -C ₁₀ heterocycloalkenyl, C ₆ -C ₆₀ aryl, C ₆ -C ₆₀ aryl A C ₆ -C ₆₀ arylthio group, a C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group and a monovalent non-aromatic heterocyclic polycyclic group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group, a C ₁ -C ₆₀ alkoxy group, a C ₃ -C ₁₀ cycloalkyl group, a C ₁ -C ₁₀ heterocycloalkyl group , C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryl giok group, C ₆ -C ₆₀ aryl come T, C ₁ -C ₆₀ hetero aryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic condensed polycyclic _{group, -N (Q 411) (Q} 412), -Si (Q 413) (Q 414) (Q 415) and (Q ₄₁₆ ) (Q ₄₁₇ ), a C ₃ -C ₁₀ cycloalkyl group, a C ₁ -C ₁₀ heterocycloalkyl group, a C ₃ -C ₁₀ cycloalkenyl group, a C ₁ -C ₁₀ heterocycloalkene group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come T, C ₁ -C ₆₀ Interrogating an aryl group, a monovalent non-aromatic condensed polycyclic group, and 1 is a non-aromatic heterocyclic group, fused polycyclic; And

Q ₄₂₁ , Q ₄₂₂ , Q ₄₂₃ , Q ₄₂₄ , Q ₄₂₅ , and -B Q ₄₂₆ , Q ₄₂₇ ; ;

L ₄₀₁ is an organic ligand;

xc1 is 1, 2 or 3;

xc2 is 0, 1, 2 or 3;

The L ₄₀₁ may be any monovalent, divalent or trivalent organic ligand. For example, L ₄₀₁ may be a halogen ligand (e.g. Cl, F), a diketone ligand (e.g., acetylacetonate, 1,3-diphenyl-l, 3- propanedionate, 6,6-tetramethyl-3,5-heptanedionate, hexafluoroacetonate), carboxylic acid ligands (e.g., picolinate, dimethyl-3-pyrazolecarboxylate, benzoate), carbon But are not limited to, monooxide ligands, isonitrile ligands, cyano ligands, and phosphorus ligands (e.g., phosphine, phosphite).

The Q ₄₀₁ to Q _407, Q ₄₁₁ to Q _417, and Q ₄₂₁ to Q ₄₂₇ are independently, hydrogen, C ₁ -C ₆₀ alkyl, C ₂ -C ₆₀ alkenyl, C ₆ -C ₆₀ aryl groups and C ₁ - C ₆₀ heteroaryl is selected from an aryl group.

If the formula of A 401 ₄₀₁ is to have two or more substituents, bonded to each other at least two substituents of A ₄₀₁ can form a saturated or unsaturated ring.

If the formula of A 401 ₄₀₂ is to have two or more substituents, bonded to each other at least two substituents of A ₄₀₂ can form a saturated or unsaturated ring.

는 서로 동일하거나 상이할 수 있다. 상기 화학식 401 중 xc1이 2 이상일 경우, A₄₀₁ 및 A₄₀₂는 각각 이웃하는 다른 리간드의 A₄₀₁ 및 A₄₀₂와 각각 직접(directly) 또는 연결기(예를 들면, C₁-C₅알킬렌기, -N(R')-(여기서, R'은 C₁-C₁₀알킬기 또는 C₆-C₂₀아릴기임) 또는 -C(=O)-)를 사이에 두고 연결될 수 있다.When xc1 in Formula 401 is 2 or more, a plurality of ligands of Formula 401

May be the same or different from each other. If the formula xc1 401 is 2 or more of, A ₄₀₁ and A ₄₀₂ are each of the other ligands neighboring A and ₄₀₁ respectively direct and A ₄₀₂ (directly) or linking group (e.g., C ₁ -C ₅ alkylene group, -N (R ') - (wherein, R' - may be connected across a) is C ₁ -C ₁₀ alkyl or C ₆ -C ₂₀ aryl group), or -C (= O).

The phosphorescent dopant may include, but is not limited to, at least one of the following compounds PD1 to PD74:

Alternatively, the phosphorescent dopant may comprise the following PtOEP:

The fluorescent dopant may include at least one of DPAVBi, BDAVBi, TBPe, DCM, DCJTB, Coumarin 6, and C545T.

Alternatively, the fluorescent dopant may include a compound represented by the following formula (501):

<Formula 501>

In the above formula (501)

Ar ₅₀₁

And examples thereof include naphthalene, heptalene, fluorenene, spiro-fluorene, benzofluorene, dibenzofluorene, phenalene, phenanthrene, anthracene, But are not limited to, fluoranthene, triphenylene, pyrene, chrysene, naphthacene, picene, perylene, pentaphene, Indenoanthracene; And

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group, a C ₁ -C ₆₀ alkoxy group, a C ₃ -C ₁₀ cycloalkyl group, a C ₁ -C ₁₀ heterocycloalkyl group , C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come T, C ₁ -C ₆₀ hetero aryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic group and the condensed polycyclic _{-Si (Q 501) (Q 502} ) (Q 503) ( Q ₅₀₁ to Q ₅₀₃ are the independently from each other, Heptalene, fluorene substituted with at least one selected from hydrogen, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₆ -C ₆₀ aryl group and a C ₁ -C ₆₀ heteroaryl group, , Spiro-fluorene, benzofuran Oren, dibenzo fluorene, page nalren, phenanthrene, anthracene, fluoranthene, triphenylene, pyrene, Cry Sen, naphthacene, pisen, perylene, penta pen and indeno anthracene; &Lt; / RTI &gt;

The descriptions of L ₅₀₁ to L ₅₀₃ refer to the description of L ₃₀₁ in the present specification, respectively;

R ₅₀₁ and R ₅₀₂ , independently of each other,

A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a klychenyl group, a pyridinyl group, , A pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazole group, a triazinyl group, a dibenzofuranyl group and a dibenzothiophenyl group; And

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₁ -C ₂₀ alkyl, C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spy-fluorenyl group, a fluorenyl group benzo, dibenzo-fluorenyl group, a phenanthrenyl group, anthracenyl A quinolinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group, a pyrazinyl group, a pyridazinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, Anthracenyl group, pyrenyl group, chrysenyl group, pyridinyl , Pyrazolyl group, pyrimidinyl group, possess a pyridazinyl group, quinolinyl group, an isoquinolinium group, a quinoxalinyl group, a quinazolinyl group, a carbazole group, a triazinyl group, a dibenzo furanoid group and dibenzo-thio group; ;

xd1 to xd3 are independently selected from 0, 1, 2 and 3;

xd4 is selected from 1, 2, 3 and 4.

The fluorescent dopant may comprise at least one of the following compounds FD1 to FD9:

<Compound FD9>

The content of the dopant in the light emitting layer may be selected from the range of about 0.01 to about 15 parts by weight based on 100 parts by weight of the host, but is not limited thereto.

The thickness of the light emitting layer may be about 100 Å to about 1000 Å, for example, about 200 Å to about 600 Å. When the thickness of the light-emitting layer satisfies the above-described range, it is possible to exhibit excellent light-emitting characteristics without substantial increase in driving voltage.

When the organic light emitting device 10 is a full color organic light emitting device, the light emitting layer 150 may be patterned as a red light emitting layer, a green light emitting layer, and a blue light emitting layer for each individual sub-pixel. Alternatively, the light emitting layer 150 may have a structure in which a red light emitting layer, a green light emitting layer, and a blue light emitting layer are laminated, or a structure in which a red light emitting material, a green light emitting material, .

Next, an electron transporting region 170 may be disposed above the light emitting layer 150.

The electron transport region 170 may include at least one of a hole blocking layer, an electron transport layer, and an electron injection layer. The method of forming the hole blocking layer, the electron transporting layer and the electron injecting layer refers to the hole injecting layer forming method.

For example, the electron transporting region may have a structure of an electron transporting layer / electron injecting layer or a hole blocking layer / electron transporting layer / electron injecting layer stacked sequentially from the light emitting layer, but the present invention is not limited thereto.

The electron transporting layer may include at least one of a compound represented by the following formula (601) and a compound represented by the following formula (602).

<Formula 601>

Ar ₆₀₁ - [(L ₆₀₁ ) _{xe 1} -E ₆₀₁ ] _{xe 2}

In the above formula (601)

Ar ₆₀₁

And examples thereof include naphthalene, heptalene, fluorenene, spiro-fluorene, benzofluorene, dibenzofluorene, phenalene, phenanthrene, anthracene, But are not limited to, fluoranthene, triphenylene, pyrene, chrysene, naphthacene, picene, perylene, pentaphene, Indenoanthracene; And

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group, a C ₁ -C ₆₀ alkoxy group, a C ₃ -C ₁₀ cycloalkyl group, a C ₁ -C ₁₀ heterocycloalkyl group , C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come T, C ₁ -C ₆₀ hetero aryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic group and the condensed polycyclic _{-Si (Q 301) (Q 302} ) (Q 303) ( Q ₃₀₁ to Q ₃₀₃ are the independently from each other, Heptalene, fluorene, spiro, substituted with at least one selected from hydrogen, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₆ -C ₆₀ aryl group or C ₁ -C ₆₀ heteroaryl group) Fluoro, benzofluorene, di Division fluorene, page nalren, phenanthrene, anthracene, fluoranthene, triphenylene, pyrene, Cry Sen, naphthacene, pisen, perylene, penta pen and indeno anthracene; ;

For a description of L ₆₀₁ , reference is made to the discussion of L ₃₀₁ herein;

E ₆₀₁ ,

A pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, isoxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, isoxazolyl, isoxazolyl, pyridinyl, pyrimidinyl, pyridazinyl, indolyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, benzoquinolinyl, phthalazinyl, naphthyridinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group (ben and examples thereof include benzofuranyl, benzofuranyl, benzofuranyl, benzofuranyl, zofuranyl, benzothiophenyl, isobenzothiazolyl, benzooxazolyl, isobenzooxazolyl, triazolyl, tetrazolyl, An oxadiazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, A pyrimidinyl group; And

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₁ -C ₂₀ alkyl, C ₁ -C ₂₀ alkoxy group, a phenyl group, a pen Frontale group, an indenyl group, a naphthyl group, an azulenyl group, a heptyl group Frontale, indazol hexenyl group, an acetoxy-naphthyl group, a fluorenyl group, A phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a thienyl group, A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a pyrazolyl group, a pyrazolyl group, a pyrazolyl group, a pyrazolyl group, a pyrazolyl group, a pyrazolyl group, A thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, A pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a pyridyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, A phenanthrolinyl group, a phenanthryl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazole group, a benzofuranyl group, A thiazolyl group, a thiazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridyl group, A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group substituted with at least one of an imidazopyrimidinyl group, , A pyrazinyl group, a pyrimidinyl group A pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a pyridyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, A phenanthrolinyl group, a phenanthryl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, a benzothiazolyl group, , Isobenzoxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, imidazopyridinyl And an imidazopyrimidinyl group; ;

xe1 is selected from 0, 1, 2 and 3;

xe2 is selected from 1, 2, 3 and 4.

<Formula 602>

In the above formula (602)

₆₁₁ X is N or _{C- (L 611) xe611 -R 611} , X 612 is N or _{C- (L 612) xe612 -R 612} , X 613 is N or C- (L _{613) xe613} -R _613, and , At least one of X ₆₁₁ to X ₆₁₃ is N;

For a description of L ₆₁₁ to L ₆₁₆ , refer to the description of L ₃₀₁ in this specification;

R ₆₁₁ to R ₆₁₆ , independently of each other,

A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a klychenyl group, a pyridinyl group, , A pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group and a triazinyl group; And

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, an azulenyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, A pyridinyl group, a pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, and a pyrenyl group which are substituted with at least one of , A krycenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, Group possess group, a quinolinyl group, an isoquinolinium group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl and possess triazole; ;

xe611 to xe616 are independently selected from 0, 1, 2 and 3;

The compound represented by Formula 601 and the compound represented by Formula 602 may be independently selected from the following compounds ET1 to ET15:

Alternatively, the electron transport layer may include at least one of the BCP, Bphen and to Alq _3, Balq, TAZ and NTAZ.

The thickness of the electron transporting layer may be about 100 Å to about 1000 Å, for example, about 150 Å to about 500 Å. When the thickness of the electron transporting layer satisfies the above-described range, satisfactory electron transporting characteristics can be obtained without substantially increasing the driving voltage.

The electron transporting layer may further include a metal-containing material in addition to the above-described materials.

The metal-containing material may comprise a Li complex. The Li complex may include, for example, the following compound ET-D1 (lithium quinolate, LiQ) or ET-D2.

The electron transport region may include an electron injection layer that facilitates electron injection from the second electrode 190.

The electron injecting layer may be formed using various methods such as vacuum deposition, spin coating, casting, LB method, inkjet printing, laser printing, and laser induced thermal imaging (LITI) , And on the electron transport layer. When the electron injection layer is formed by the vacuum deposition method and the spin coating method, the deposition conditions and the coating conditions of the electron injection layer refer to the deposition conditions and the coating conditions of the hole injection layer.

The electron injection layer may include at least one selected from LiF, NaCl, CsF, Li ₂ O, BaO and LiQ.

The thickness of the electron injection layer may be from about 1 A to about 100 A, and from about 3 A to about 90 A. When the thickness of the electron injection layer satisfies the above-described range, satisfactory electron injection characteristics can be obtained without substantially increasing the driving voltage.

The second electrode 190 is disposed above the electron transporting region 170 as described above. The second electrode 190 may be a cathode, which is an electron injection electrode. At this time, the material for the second electrode 190 may be a metal, an alloy, an electrically conductive compound having a low work function, Can be used. Specific examples of the material for the second electrode 190 include Li, Mg, Al, Al-Li, Ca, Mg-In, , Magnesium-silver (Mg-Ag), and the like. Alternatively, ITO or IZO may be used as the material for the second electrode 190. The second electrode 190 may be a transflective electrode or a transmissive electrode.

In the present specification, the C ₁ -C ₆₀ alkyl group means a linear or branched aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms. Specific examples thereof include methyl, ethyl, propyl, isobutyl, sec-butyl A tert-butyl group, a pentyl group, an iso-amyl group, a hexyl group, and the like. In the present specification, a C ₁ -C ₆₀ alkylene group means a divalent group having the same structure as the above C ₁ -C ₆₀ alkyl group.

The C ₁ -C ₆₀ alkoxy group in the present specification means a monovalent group having the formula: -OA ₁₀₁ (wherein A ₁₀₁ is the above C ₁ -C ₆₀ alkyl group), and specific examples thereof include methoxy group, ethoxy group , Isopropyloxy group, and the like.

In the present specification, the C ₂ -C ₆₀ alkenyl group means a hydrocarbon group having at least one carbon double bond at the middle or end of the C ₂ -C ₆₀ alkyl group, and specific examples thereof include an ethenyl group, a propenyl group, a butenyl group And the like. In the present specification, the C ₂ -C ₆₀ alkenylene group means a divalent group having the same structure as the C ₂ -C ₆₀ alkenyl group.

In the present specification, a C ₂ -C ₆₀ alkynyl group means a hydrocarbon group containing at least one carbon-carbon triple bond at the middle or end of the C ₂ -C ₆₀ alkyl group, and specific examples thereof include ethynyl, propynyl, and the like. In the present specification, the C ₂ -C ₆₀ alkynylene group means a divalent group having the same structure as the C ₂ -C ₆₀ alkynyl group.

In the present specification, the C ₃ -C ₁₀ cycloalkyl group means a monovalent saturated hydrocarbon monocyclic group having 3 to 10 carbon atoms, and specific examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cyclo Heptyl group and the like. The C ₃ -C ₁₀ cycloalkylene group of the specification and the second having the same structure as the above C ₃ -C ₁₀ cycloalkyl group means a group.

In the present specification, the C ₁ -C ₁₀ heterocycloalkyl group means a monovalent monocyclic group having 1 to 10 carbon atoms including at least one heteroatom selected from N, O, Si, P and S as a ring-forming atom , And specific examples thereof include tetrahydrofuranyl, tetrahydrothiophenyl, and the like. In the present specification, a C ₁ -C ₁₀ heterocycloalkylene group means a divalent group having the same structure as the above-mentioned C ₁ -C ₁₀ heterocycloalkyl group.

In the present specification, the C ₃ -C ₁₀ cycloalkenyl group is a monovalent monocyclic group having 3 to 10 carbon atoms, which has at least one double bond in the ring, but does not have aromatics, Examples include a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group and the like. In the present specification, the C ₃ -C ₁₀ cycloalkenylene group means a divalent group having the same structure as the C ₃ -C ₁₀ cycloalkenyl group.

In the present specification, the C ₁ -C ₁₀ heterocycloalkenyl group is a monovalent monocyclic group having 1 to 10 carbon atoms including at least one hetero atom selected from N, O, Si, P and S as a ring-forming atom, Lt; RTI ID = 0.0 &gt; a &lt; / RTI &gt; Specific examples of the C ₁ -C ₁₀ heterocycloalkenyl group include a 2,3-hyrofuranyl group, a 2,3-hydrothiophenyl group and the like. In the present specification, the C ₁ -C ₁₀ heterocycloalkenylene group means a divalent group having the same structure as the C ₁ -C ₁₀ heterocycloalkenyl group.

In the present specification, a C ₆ -C ₆₀ aryl group means a monovalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms, and a C ₆ -C ₆₀ arylene group means a carbamoyl group having 6 to 60 carbon atoms Quot; means a divalent group having a cyclic aromatic system. Specific examples of the C ₆ -C ₆₀ aryl group include a phenyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, a klycenyl group and the like. The C ₆ -C ₆₀ aryl groups and C ₆ -C ₆₀ arylene If the group contains two or more rings, the 2 or more rings may be fused to each other.

As used herein, a C ₁ -C ₆₀ heteroaryl group is a monovalent group having at least one heteroatom selected from N, O, Si, P and S as a ring-forming atom and having a carbocyclic aromatic system having from 1 to 60 carbon atoms C ₁ -C ₆₀ heteroarylene group means a divalent group having at least one heteroatom selected from N, O, P and S as a ring-forming atom and having a carbocyclic aromatic system having 1 to 60 carbon atoms . Specific examples of the C ₁ -C ₆₀ heteroaryl group include a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group and the like. When the C ₁ -C ₆₀ heteroaryl group and the C ₁ -C ₆₀ heteroarylene group include two or more rings, two or more rings may be fused together.

In the present specification, the C ₆ -C ₆₀ aryloxy group indicates -OA ₁₀₂ (wherein A ₁₀₂ is the C ₆ -C ₆₀ aryl group), the C ₆ -C ₆₀ arylthio is -SA ₁₀₃ , And A ₁₀₃ is the above-mentioned C ₆ -C ₆₀ aryl device).

In the present specification, a monovalent non-aromatic condensed polycyclic group is a condensed polycyclic group in which two or more rings are condensed with each other and contain only carbon as a ring-forming atom, and the whole molecule is a non- (E. G., Having from 8 to 60 carbon atoms). Examples of the monovalent non-aromatic condensed polycyclic group include a fluorenyl group and the like. In the present specification, the divalent non-aromatic condensed polycyclic group means a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.

In the present specification, a monovalent non-aromatic condensed heteropolycyclic group is a condensed heteropolycyclic group in which two or more rings are condensed with each other and a heteroatom selected from N, O, Si, P and S in addition to carbon as a ring- (For example, having from 1 to 60 carbon atoms) having a non-aromatic group as a whole. The monovalent non-aromatic heterocyclic polycyclic group includes a carbazolyl group and the like. In the present specification, the divalent non-aromatic heterocyclic polycyclic group means a divalent group having the same structure as the monovalent non-aromatic heterocyclic polycyclic group.

In the present specification, the substituted C ₃ -C ₁₀ cycloalkylene group, the substituted C ₁ -C ₁₀ heterocycloalkylene group, the substituted C ₃ -C ₁₀ cycloalkenylene group, the substituted C ₁ -C ₁₀ heterocycloalkylene group A substituted divalent non-aromatic heterocyclic polycyclic group, a substituted C ₆ -C ₆₀ arylene group, a substituted C ₁ -C ₆₀ heteroarylene group, a substituted divalent non-aromatic condensed polycyclic group, a substituted divalent non-aromatic heterocyclic polycyclic group, a substituted C ₁ -C ₆₀ alkyl, substituted C ₂ -C ₆₀ alkenyl, substituted C ₂ -C ₆₀ alkynyl group, a substituted C ₁ -C ₆₀ alkoxy group, a substituted C ₃ -C ₁₀ cycloalkyl groups, substituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted C ₃ -C ₁₀ cycloalkenyl group, a substituted C ₁ -C ₁₀ heteroaryl cycloalkenyl group, a substituted C ₆ -C ₆₀ aryl, substituted C ₆ -C ₆₀ aryloxy group of aromatic heterocyclic substituents of the fused polycyclic group -, substituted C ₆ -C ₆₀ arylthio group, a substituted C ₁ -C ₆₀ heteroaryl groups, substituted monovalent non-aromatic condensed polycyclic groups, and substituted monovalent non- Least one,

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ - C ₆₀ aryloxy group (aryloxy), C ₆ -C ₆₀ arylthio group (arylthio), C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic group and a fused polycyclic- A C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group substituted with at least one of Si (Q ₁₁ ) (Q ₁₂ ) (Q ₁₃ );

C ₃ -C ₁₀ cycloalkyl, C ₁ -C ₁₀ heterocycloalkyl, C ₃ -C ₁₀ cycloalkenyl, C ₁ -C ₁₀ heterocycloalkenyl, C ₆ -C ₆₀ aryl, C ₆ -C ₆₀ aryl A C ₆ -C ₆₀ arylthio group, a C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group and a monovalent non-aromatic heterocyclic polycyclic group;

Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group, a C ₁ -C ₆₀ alkoxy group, a C ₃ -C ₁₀ cycloalkyl group, a C ₁ -C ₁₀ heterocycloalkyl group , C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come T, C ₁ -C ₆₀ hetero aryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic group and the condensed polycyclic _{-Si (Q 21) (Q 22} ) (Q 23) of the at least one substituted, C ₃ -C ₁₀ cycloalkyl alkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy group, C ₆ - Import C ₆₀ aryl T, C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic is fused A ring group and a monovalent non-aromatic heterocyclic polycyclic group; And

_{-Si (Q 31) (Q 32} ) (Q 33); &Lt; / RTI &gt;

Wherein Q ₁ to Q ₃ , Q ₁₁ to Q ₁₃ , Q ₂₁ to Q ₂₃ and Q ₃₁ to Q ₃₃ are each independently selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkenyl group, C ₁ -C ₆ alkenyl group, C ₁ -C ₆ alkenyl group, C ₁ -C ₆ alkenyl group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, C ₂ -C ₁₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heterocycloalkenyl group , A C ₆ -C ₆₀ aryl group, a C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic heterocyclic polycyclic group.

In the present specification, "Ph" means a phenyl group, "Me" means a methyl group, "Et" means an ethyl group, and "ter-Bu" or "Bu ^t " means a tert-butyl group.

In the present specification, "biphenyl group" means "phenyl group substituted with phenyl group &quot;. The "biphenyl group" belongs to a "substituted phenyl group" in which the substituent is a "C ₆ -C ₆₀ aryl group".

In the present specification, "terphenyl group" means "phenyl group substituted with biphenyl group". The "terphenyl group" belongs to a "substituted phenyl group" in which the substituent is a "C ₆ -C ₆₀ aryl group substituted with a C ₆ -C ₆₀ aryl group".

Hereinafter, the organic light emitting device according to one embodiment of the present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples.

 [ Example ]

Example  One

An ITO glass substrate (manufactured by Corning) having an ITO layer of 15 Ω / cm ² (1,200 Å) formed was cut into a size of 50 mm × 50 mm × 0.7 mm and ultrasonically cleaned using isopropyl alcohol and pure water for 5 minutes Thereafter, the substrate was irradiated with ultraviolet rays for 30 minutes, exposed to ozone and cleaned, and the ITO glass substrate (anode) was installed in a vacuum deposition apparatus.

 2-TNATA was vacuum deposited on the ITO anode substrate to form a hole injection layer having a thickness of 600 A, and a hole transport layer was formed by vacuum evaporation of the compound 105 to a thickness of 300 ANGSTROM on the hole injection layer.

 Compound 1 was vacuum-deposited on the hole transport layer to a thickness of 60 Å to form a hole transport layer, thereby forming a hole transport region.

CBP (host) and PD2 (dopant) were co-deposited on the hole-assist layer in a weight ratio of 95: 5 to form a light-emitting layer with a thickness of 20 nm.

Next, ET1 was deposited on the light emitting layer to form an electron transport layer having a thickness of 300 ANGSTROM. Then, LiF was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 ANGSTROM to form a hole transport region.

Thereafter, Al was deposited on the electron injection layer to form a cathode of 3,000 angstroms to prepare an organic light emitting device.

Example  2 and 3

An organic light emitting device was fabricated using the same method as in Example 1 except that the materials shown in Table 1 were used for forming the hole transporting layer and the hole auxiliary layer.

Comparative Example  One

An organic light emitting device was fabricated in the same manner as in Example 1 except that TPD was used instead of Compound 105 in forming the hole transport layer.

Comparative Example  2

An organic light emitting device was fabricated in the same manner as in Example 1 except that NPB was used instead of Compound 1 in the formation of the hole assist layer.

Comparative Example  3

An organic light emitting device was fabricated in the same manner as in Example 1, except that TPD was used instead of Compound 105 in the formation of the hole transport layer, and Compound 8 was used instead of Compound 1 in forming the hole assist layer.

Comparative Example  4

TPD was used instead of Compound 105 in the formation of the hole transport layer, and organic light emitting devices were fabricated in the same manner as in Example 1, except that NPB was used instead of Compound 1 in forming the hole assist layer.

Comparative Example  5

An organic light emitting device was fabricated in the same manner as in Example 1, except that Compound A was used instead of Compound 105 in forming the hole transport layer, and Compound B was used in place of Compound 1 in forming the hole assist layer.

<Compound A>

<Compound B>

Comparative Example  6

An organic light emitting device was fabricated in the same manner as in Example 1, except that the hole-assist layer was not formed and that Compound C was used instead of Compound 105 in forming the hole transport layer.

<Compound C>

Comparative Example  7

An organic light emitting device was fabricated in the same manner as in Example 1, except that the hole-assist layer was not formed.

Evaluation example  One

The driving voltage, current density, efficiency, luminance, luminous color and half-life at 1000 nits of the organic light-emitting devices fabricated in Examples 1 to 3 and Comparative Examples 1 to 7 were measured using Kethley SMU 236 and luminance meter PR650 , And the results are shown in Table 1. The half life time is the time taken for the luminance to become 50% of the initial luminance after driving the organic light emitting element.

Hole transport layer material Hole-assisted layer material Driving voltage
(V) electric current
density
(mA / cm ² ) efficiency
(cd / A) Luminance
(cd / m ² ) Luminous color Half-life
(hr) Example 1 Compound 105 Compound 1 4.1 10.5 6.5 545 blue 200 Example 2 Compound 105 Compound 4 4.0 9.9 5.5 550 blue 160 Example 3 Compound 105 Compound 7 4.1 10.3 5.4 560 blue 190 Comparative Example 1 TPD Compound 1 4.9 12.4 4.3 450 blue 45 Comparative Example 2 Compound 105 NPB 4.6 11.0 3.7 393 blue 79 Comparative Example 3 TPD Compound 8 5.9 10.9 2.9 299 blue 92 Comparative Example 4 TPD NPB 6.5 9.8 3.4 345 blue 74 Comparative Example 5 Compound A Compound B 4.3 10.2 5.1 565 blue 140 Comparative Example 6 Compound C - 5.0 14.0 2.4 254 blue 135 Comparative Example 7 Compound 105 - 3.8 14.0 3.2 324 blue 140

From Table 1, it can be confirmed that the driving voltage, the efficiency, the luminance, and the half life time of the organic light emitting devices of Examples 1 to 3 are superior to the driving voltage, efficiency, luminance, and half life of the organic light emitting devices of Comparative Examples 1 to 7 .

10: Organic light emitting device
110: first electrode
130: hole transport region
150: light emitting layer
170: electron transport region
190: second electrode

Claims (20)

A first electrode;
A second electrode;
An emission layer between the first electrode and the second electrode; And
And a hole transporting region between the first electrode and the light emitting layer,
Wherein the hole transporting region comprises a first compound represented by the following Formula 1 and a second compound represented by the following Formula 2:
&Lt; Formula 1 >

(2)

Among the above general formulas (1) and (2)
X ₁ and X ₂ are independently selected from N, B and P;
Y ₁ is selected from O, S and _{N [(L 11) a11 -R} 14], Y 2 is selected from O, S and _{N [(L 12) a12 -R} 15];
L ₁ to L ₄ , L ₁₁ and L ₁₂ each independently represent a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene groups, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenylene groups, substituted or unsubstituted C ₆ -C ₆₀ arylene groups, substituted or unsubstituted C ₁ -C ₆₀ hetero Substituted or unsubstituted divalent non-aromatic condensed polycyclic group and a substituted or unsubstituted divalent non-aromatic heterocyclic polycyclic group (substituted or unsubstituted divalent non- aromatic condensed heteropolycyclic group, wherein L < ₄ > is not a substituted or unsubstituted carbazolylene group;
a1 to a4, a11 and a12 are each independently selected from integers from 0 to 3;
Ar ₁ and Ar ₂ are, independently of each other, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group , A substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₁ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent Selected from a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group and a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, wherein the substituted or unsubstituted monovalent non-aromatic condensed polycyclic group Ar ₂ in Formula (2) is not a substituted or unsubstituted carbazolyl group;
R ₁ to R ₈ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, the acid or its salt, a sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, a substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₂ -C ₆₀ alkenyl group, a substituted or unsubstituted C ₂ -C ₆₀ A substituted or unsubstituted C ₁ -C ₁₀ alkoxy group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₁ -C ₁₀ heteroaryl cycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, a substituted or unsubstituted C ₆ -C ₆₀ arylthio group, a substituted or unsubstituted C ₁ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed A ring group, a substituted or unsubstituted 1, a non-aromatic heterocyclic is selected from a condensed polycyclic group, and _{-Si (Q 1) (Q 2} ) (Q 3);
R ₁₁ to R ₁₅ independently represent a substituted or unsubstituted C ₁ -C ₆₀ alkyl group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted Or an unsubstituted C ₃ -C ₁₀ cycloalkenyl group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₁ -C ₆₀ heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic heterocyclic polycyclic group;
b1, b4, b5 and b7 are each independently selected from integers from 1 to 4;
b2, b3, b6 and b8 are each independently selected from integers from 1 to 3;
The substituted C ₃ -C ₁₀ cycloalkyl, substituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted C ₃ -C ₁₀ cycloalkenyl group, a substituted C ₁ -C ₁₀ heteroaryl cycloalkenyl group, a substituted C ₆ - C ₆₀ aryl group, a substituted C ₁ -C ₆₀ heteroaryl groups, substituted monovalent non-aromatic condensed polycyclic group, a substituted monovalent non-aromatic heterocyclic condensed polycyclic group, a substituted C ₁ -C ₆₀ alkyl group, a substituted A C ₂ -C ₆₀ alkenyl group, a substituted C ₂ -C ₆₀ alkynyl group, a substituted C ₁ -C ₆₀ alkoxy group, a substituted C ₃ -C ₁₀ cycloalkyl group, a substituted C ₁ -C ₁₀ heterocycloalkyl group, a substituted Substituted C ₃ -C ₁₀ cycloalkenyl groups, substituted C ₁ -C ₁₀ heterocycloalkenyl groups, substituted C ₆ -C ₆₀ aryl groups, substituted C ₆ -C ₆₀ aryloxy groups, substituted C ₆ -C ₆₀ At least one of the substituents of the substituted monovalent non-aromatic heterocyclic polycyclic group, the arylthio group, the substituted C ₁ -C ₆₀ heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group and the substituted monovalent non-
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group;
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ - C ₆₀ aryloxy group (aryloxy), C ₆ -C ₆₀ arylthio group (arylthio), C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic group and a fused polycyclic- A C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group and a C ₁ -C ₆₀ alkoxy group substituted with at least one of Si (Q ₁₁ ) (Q ₁₂ ) (Q ₁₃ );
C ₃ -C ₁₀ cycloalkyl, C ₁ -C ₁₀ heterocycloalkyl, C ₃ -C ₁₀ cycloalkenyl, C ₁ -C ₁₀ heterocycloalkenyl, C ₆ -C ₆₀ aryl, C ₆ -C ₆₀ aryl A C ₆ -C ₆₀ arylthio group, a C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group and a monovalent non-aromatic heterocyclic polycyclic group;
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₆₀ alkyl group, a C ₂ -C ₆₀ alkenyl group, a C ₂ -C ₆₀ alkynyl group, a C ₁ -C ₆₀ alkoxy group, a C ₃ -C ₁₀ cycloalkyl group, a C ₁ -C ₁₀ heterocycloalkyl group , C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come T, C ₁ -C ₆₀ hetero aryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic heterocyclic group and the condensed polycyclic _{-Si (Q 21) (Q 22} ) (Q 23) of the at least one substituted, C ₃ -C ₁₀ cycloalkyl alkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy group, C ₆ - Import C ₆₀ aryl T, C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic is fused A ring group and a monovalent non-aromatic heterocyclic polycyclic group; And
_{-Si (Q 31) (Q 32} ) (Q 33); ;
Wherein Q ₁ to Q ₃ , Q ₁₁ to Q ₁₃ , Q ₂₁ to Q ₂₃ and Q ₃₁ to Q ₃₃ are each independently selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, C ₁ -C ₆₀ alkyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkenyl group, C ₂ -C ₆₀ alkenyl group, C ₁ -C ₆ alkenyl group, C ₁ -C ₆ alkenyl group, C ₁ -C ₆ alkenyl group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, C ₂ -C ₁₀ alkynyl group, C ₁ -C ₆₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heterocycloalkenyl group , A C ₆ -C ₆₀ aryl group, a C ₁ -C ₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic heterocyclic polycyclic group. The method according to claim 1,
L ₁ to L ₄ , L ₁₁ and L ₁₂ in the general formulas (1) and (2)
A phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, A phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, a phenanthrenylene group, , Anthracenylene, fluoranthenylene, triphenylenylene, pyrenylene, chrysenylene, naphthacenylene, picenylene, and the like. Perylene, pentaphenylene, hexacenylene, pentacenylene, rubicenylene, coronenylene, and ovalenyl (hereinafter referred to as "ovalenyl"), perylenylene, pentaphenylene, pentacenylene, pentacenylene, Ovalenylene, thiophenylene group ( a thiophenylene group, a furanylene group, a carbazolylene group, a benzofuranylene group, a benzothiophenylene group, a dibenzofuranylene group, a dibenzothiophenylene group, , Benzocarbazolylene group and dibenzocarbazolylene group; And
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₁ -C ₂₀ alkyl, C ₁ -C ₂₀ alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pen Frontale group, an indenyl group, a naphthyl group , An azulenyl group, an heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, A perylene group, a perylene group, a perylene group, a perylene group, a perylene group, a perylene group, a perylene group, a perylene group, An ovalenyl group, a thiophenyl group, a furanyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group A phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptarenylene group, a dibenzothiophenyl group, a dibenzothiophenyl group, a benzocarbazolyl group and a dibenzocarbazolyl group, , A phenanthrenylene group, a phenanthrenylene group, an anthracenylene group, a fluoroalkylene group, a phenanthrenylene group, an anthracenylene group, an anthracenylene group, an anthracenylene group, a fluorenylene group, A naphthacenylene group, a pentalenylene group, a perylenylene group, a pentaphenylene group, a hexacenylene group, a pentacenylene group, a rubicecylene group, a coronenylene group, a pyrenylene group, a pyrenylene group, , Ovalenylene group, thiophenylene group, furanylene group, carbazolylene group, benzofuranylene group, benzothiophenylene group, dibenzofuranylene group, dibenzothiophenylene group, benzocarbazolylene group and dibenzocarbazolylene group ; &Lt; / RTI &gt; The method according to claim 1,
L ₁ to L ₄ , L ₁₁ and L ₁₂ in the general formulas (1) and (2)
An organic electroluminescent element selected from the group consisting of the following structural formulas (3-1) to (3-11)

Among the above-mentioned formulas (3-1) to (3-11)
Y ₁ is selected from O, S, C (Z ₃ ) (Z ₄ ) and N (Z ₅ );
Z ₁ to Z ₅ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, A sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group , A dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a klycenyl group,
d1 is selected from an integer of 1 to 4, d2 is selected from an integer of 1 to 3, d3 is selected from an integer of 1 to 6, d4 is selected from an integer of 1 to 8, Is selected from integers, and * and * are binding sites with neighboring atoms. The method according to claim 1,
In the formula 1 and 2, the _{* - (L 1) a1 -} * ' to _{* - (L 4) a4 -} *', * - (L 11) a11 - * ' and _{* - (L 12) a12 -} * 'Independently of one another are selected from the group consisting of a single bond and the following formulas (3-1) and (3-12):

Z ₁ and Z ₂ are independently selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, A sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a cyano group, D1 is selected from an integer of 1 to 4, and * and * are independently selected from the group consisting of a hydrogen atom, a halogen atom, a cyano group, a cyano group, a cyano group, * 'Is a binding site with neighboring atoms. The method according to claim 1,
Wherein the sum of a1, a2, and a3 in Formula 1 is 1 or more. The method according to claim 1,
In Formula 2,
a4 is selected from integers from 0 to 2, and a11 and a12 are independently selected from 0 and 1, respectively. The method according to claim 1,
In the general formulas (1) and (2), Ar ₁ and Ar ₂ are, independently of each other,
A phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, An isothiazolyl group, an isoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyrazinyl group, a pyrimidinyl group, a pyrazinyl group, a pyrimidinyl group, A benzothiophenyl group, an isobenzothiazolyl group, an isobenzothiazolyl group, an isobenzothiazolyl group, an isobenzothiazolyl group, an imidazolyl group, an imidazolyl group, an imidazolyl group, A benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group and an imidazopyrimidinyl group; And
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, an isoxazolyl group, an isoxazolyl group, A pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, A benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, isobenzoxazole Group, an oxadiazole group, a triazinyl group, a dibenzo furanoid group, a dibenzo thiophenyl group, imidazole jopi piperidinyl group, at least one of the imidazo pyrimidinyl group and a _{-Si (Q 31) (Q 32} ) (Q 33) A phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, An isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyridyl group, a pyridyl group, a pyridyl group, a pyridyl group, a pyridyl group, A thiophene group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, a thienylthio group, A benzooxazolyl group, an isobenzoxazolyl group, an oxadi Sol group, triazinyl group, a dibenzo furanoid group, a dibenzo thiophenyl group, imidazole group and a piperidinyl jopi imidazo pyrimidinyl group; ;
Wherein Q ₃₁ to Q ₃₃ are independently selected from a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, and a naphthyl group. The method according to claim 1,
Wherein Ar ₁ and Ar ₂ are, independently of each other,
A phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, an anthracenyl group, a phenanthrenyl group, a pyridinyl group, a pyrimidinyl group, A norbornyl group and a dibenzothiophenyl group; And
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, a salt thereof, C ₁ -C ₁₀ alkyl, C ₁ -C ₁₀ alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spy-fluorenyl group, benzo fluorenyl group, an anthracenyl group, phenanthryl A naphthyl group substituted with at least one of -Si (Q ₃₁ ) (Q ₃₂ ) (Q ₃₃ ), a thienyl group, a thienyl group, a thienyl group, a pyridinyl group, a pyrimidinyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, A fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, an anthracenyl group, a phenanthrenyl group, a pyridinyl group, a pyrimidinyl group, a triazinyl group, a dibenzofuranyl group and a dibenzothiophenyl group; &Lt; / RTI &gt;
Wherein Q ₃₁ to Q ₃₃ are independently selected from a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, and a naphthyl group. The method according to claim 1,
In the general formulas (1) and (2), R ₁ to R ₈ are, independently of each other,
A halogen atom, a hydroxyl group, a hydroxyl group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, Phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;
A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylrenyl group, a pyrenyl group, , A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, An isoquinolyl group, an isoquinolyl group, an isoquinolyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, A benzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group;
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, an isoxazolyl group, an isoxazolyl group, A pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, A benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, isobenzoxazole Group, an oxadiazole group, a triazinyl group, a dibenzo furanoid group, a dibenzo thiophenyl group, imidazole jopi piperidinyl group, at least one of the imidazo pyrimidinyl group and a _{-Si (Q 31) (Q 32} ) (Q 33) A substituted or unsubstituted phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, , Pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl A quinolinyl group, a quinolyl group, a quinolinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, Diazo, isobenzoxazolyl, oxadiazolyl, triazinyl A dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group; And
_{-Si (Q 1) (Q 2} ) (Q 3); ;
R ₁₁ to R ₁₅ are, independently of each other,
A C ₁ -C ₂₀ alkyl group and a C ₁ -C ₂₀ alkoxy group;
A phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylrenyl group, a pyrenyl group, , A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, An isoquinolyl group, an isoquinolyl group, an isoquinolyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, A benzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group;
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, A thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, an isoxazolyl group, an isoxazolyl group, A pyridinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, A benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, isobenzoxazole Group, an oxadiazole group, a triazinyl group, a dibenzo furanoid group, a dibenzo thiophenyl group, imidazole jopi piperidinyl group, at least one of the imidazo pyrimidinyl group and a _{-Si (Q 31) (Q 32} ) (Q 33) A substituted or unsubstituted phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, , Pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl A quinolinyl group, a quinolyl group, a quinolinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, Diazo, isobenzoxazolyl, oxadiazolyl, triazinyl A dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group; And
_{-Si (Q 1) (Q 2} ) (Q 3); &Lt; / RTI &gt;
Wherein Q ₁ to Q ₃ and Q ₃₁ to Q ₃₃ are independently selected from a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group and a naphthyl group. The method according to claim 1,
In the general formulas (1) and (2), R ₁ to R ₈ are, independently of each other,
A halogen atom, a hydroxyl group, a hydroxyl group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, Phosphoric acid or a salt thereof, a C ₁ -C ₁₀ alkyl group and a C ₁ -C ₁₀ alkoxy group;
A phenanthrenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a crycenyl group, a carbazole group, a phenanthryl group, A diaryl group, a dibenzofuranyl group, and a dibenzothiophenyl group;
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A phenyl group, a naphthyl group, a fluoro group substituted with at least one of a salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group and -Si (Q ₃₁ ) (Q ₃₂ ) (Q ₃₃ ) Anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, carbazolyl group, dibenzofuranyl group and dibenzofuranyl group may be optionally substituted with at least one substituent selected from the group consisting of a halogen atom, A dibenzothiophenyl group; And
_{-Si (Q 1) (Q 2} ) (Q 3); ;
R ₁₁ to R ₁₅ are, independently of each other,
A C ₁ -C ₁₀ alkyl group and a C ₁ -C ₁₀ alkoxy group;
A phenanthrenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a crycenyl group, a carbazole group, a phenanthryl group, A diaryl group, a dibenzofuranyl group, and a dibenzothiophenyl group;
Wherein the substituent is selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, A phenyl group, a naphthyl group, a fluoro group substituted with at least one of a salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group, a naphthyl group and -Si (Q ₃₁ ) (Q ₃₂ ) (Q ₃₃ ) Anthracenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, carbazolyl group, dibenzofuranyl group and dibenzofuranyl group may be optionally substituted with at least one substituent selected from the group consisting of a halogen atom, A dibenzothiophenyl group; And
_{-Si (Q 1) (Q 2} ) (Q 3); ;
Wherein Q ₁ to Q ₃ and Q ₃₁ to Q ₃₃ are independently selected from a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group, a phenyl group and a naphthyl group. The method according to claim 1,
Ar ₁ and Ar ₂ are independently selected from the group of the following formulas (5-1) to (5-20)
R ₁ to R ₈ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, A salt thereof, an acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group and a group represented by the following formulas (5-1 to 5-12)
R ₁₁ to R ₁₅ are independently selected from the group consisting of a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group and groups represented by the following formulas (5-1) to (5-12):

Among the formulas (5-1) to (5-20)
Y ₃₁ is selected from O, S, C (Z ₃₅ ) (Z ₃₆ ), N (Z ₃₇ ) and Si (Z ₃₈ ) (Z ₃₉ );
Z ₃₁ to Z ₃₉ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, Wherein R _{1 is} selected from the group consisting of an acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₂₀ alkyl group, a C ₁ -C ₂₀ alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, A phenanthrenyl group, an anthracenyl group, a pyrenyl group, a klychenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, An isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group and a triazinyl group;
e1 is an integer of 1 to 5, e2 is an integer of 1 to 7, e3 is an integer of 1 to 3, e4 is an integer of 1 to 4, e5 is 1 or 2, e6 is an integer of 1 to 6 E7 is an integer of 1 to 9, and * is a binding site with neighboring atoms. The method according to claim 1,
Ar ₁ and Ar ₂ in the general formulas (1) and ( ₂₎ are selected from the group consisting of the following formulas (6-1) to (6-33)
R ₁ to R ₈ independently represent hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, A salt thereof, an acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group and groups represented by the following formulas (6-1) to (6-29)
R ₁₁ to R ₁₅ are independently selected from the group consisting of a C ₁ -C ₁₀ alkyl group, a C ₁ -C ₁₀ alkoxy group and groups represented by the following formulas (6-1) to (6-29):

In the above formulas (6-1) to (6-33), * denotes a bonding site with neighboring atoms. The method according to claim 1,
Wherein the first compound is represented by one of the following formulas (1-1) to (1-4):
&Lt; Formula 1-1 >

(1-2)

<Formula 1-3>

<Formula 1-4>

X1, L1 to L3, a1 to a3, Ar1, R1 to R4, R11 to R13, and b1 to b4 in the above formulas 1-1 to 1-4 are the same as defined in claim 1. The method according to claim 1,
Wherein the first compound is represented by one of the following formulas (1-1) and (1-1):
&Lt; Formula 1-1 (1) >

&Lt; Formula 1-1 (2)

Wherein X1, L1, L3, a1, a3, Ar1, R1 to R4, R13 and b1 to b4 are as defined in claim 1, and R31 To R33 refer to the description of R1 in the first paragraph, b31 is selected from integers from 1 to 4, and b32 and b33 are independently selected from integers from 1 to 5. The method according to claim 1,
Wherein the second compound is represented by one of the following formulas (2-1) to (2-3):
&Lt; Formula (2-1)

&Lt; Formula (2-2)

<Formula 2-3>

In the formula 2-1 to _{2-3, X 2, Y 1,} Y 2, L 4, L 11, L 12, a4, a11, a12, Ar 2, R 5 to R _8, R _14, R _15, and and b5 to b8 are the same as defined in claim 1. 16. The method of claim 15,
Ar ₂ in the general formulas (2-1) to (2-3) is selected from the group consisting of the following formulas (6-1) to (6-14), (6-16) :

In the formulas (6-1) to (6-14), (6-16) to (6-18) and (6-20) to (6-33), * denotes a bonding site with neighboring atoms. The method according to claim 1,
Wherein the first compound is one of the following compounds 101 to 109, and the second compound is one of the following compounds 1 to 36:

The method according to claim 1,
Wherein the hole transport layer comprises a hole transport layer and a hole assisting layer, the hole transport layer comprises the first compound represented by Formula 1, and the hole assisting layer comprises the second compound represented by Formula 2 , An organic light emitting element. 19. The method of claim 18,
Wherein the hole-assist layer is disposed between the light-emitting layer and the first electrode, and the hole-transport layer is disposed between the hole-assist layer and the first electrode. 19. The method of claim 18,
Wherein the hole-assist layer directly contacts the light-emitting layer.

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