EP3802520A1

EP3802520A1 - Composition for organic electronic devices

Info

Publication number: EP3802520A1
Application number: EP19729458.0A
Authority: EP
Inventors: Amir Parham; Jonas Kroeber; Jens ENGELHART; Anja JATSCH; Christian EICKHOFF; Christian Ehrenreich
Original assignee: Merck Patent GmbH
Current assignee: Merck Patent GmbH
Priority date: 2018-05-30
Filing date: 2019-05-28
Publication date: 2021-04-14
Also published as: KR20210016423A; WO2019229011A1; US20220332724A1; CN112166112A

Abstract

The invention relates to a composition comprising an electron-transporting host and a hole-transporting host, to the use thereof in electronic devices and to electronic devices containing said composition. The electron-transporting host is most preferably selected from the class of triazine-dibenzofurane-fluorenyl systems or from the class of triazine-dibenzothiophene-fluorenyl systems. The hole-transporting host is preferably selected from the class of biscarbazoles.

Description

Composition for organic electronic devices

The present invention relates to a composition comprising an electron transporting host and a hole transporting host, their use in electronic devices and electronic devices containing this composition. The electron transporting host is most preferably selected from the class of triazine dibenzofuran fluorenyl systems or the class of triazine dibenzothiophene fluorenyl systems. The hole transporting host is preferably selected from the class of biscarbazoles.

The construction of organic electroluminescent devices (for example OLEDs - organic light-emitting diodes or OLECs-organic light-emitting electrochemical cells) in which organic semiconductors are used as functional materials is described, for example, in US Pat. No. 4,539,507, US Pat.

EP 0676461 and WO 98/27136. As emissive materials in addition to fluorescent emitters are increasing

organometallic complexes used that place phosphorescence

Fluorescence (M.A. Baldo et al., Appl. Phys. Lett. 1999, 75, 4-6). For quantum mechanical reasons, up to fourfold increased energy and power efficiency is possible using organometallic compounds as phosphorescence emitters. In general there are OLEDs, especially in OLEDs show the triplet emission (phosphorescence), but still in need of improvement, for example in

In terms of efficiency, operating voltage and service life.

The properties of organic electroluminescent devices are not determined solely by the emitters used. Here, in particular, the other materials used, such as host and matrix materials, hole blocking materials, electron transport materials,

Hole transport materials and electron or exciton blocking materials of particular importance, and in particular the host or matrix materials. Improvements to these materials can lead to significant improvements in electroluminescent devices.

Host materials for use in organic electronic

Devices are well known to those skilled in the art. The term matrix material is also frequently used in the prior art if a host material for phosphorescent emitters is meant. This use of the term also applies to the present invention. Meanwhile, a variety of host materials for both fluorescent and for

developed phosphorescent electronic devices.

According to the prior art, inter alia, triazines as

Matrix materials used for phosphorescent emitters,

For example, structures such as in WO 2008/056746, KR 20150074603, KR 20150136027, WO 2015/169412, EP3043398 A1, JP5831654, US

2016/093808, US 2017/0054087 or WO 2018/016742.

Another way to improve the performance of electronic devices, in particular of organic electroluminescent devices, is to use combinations of two or more materials, in particular host materials or matrix materials.

US 6,392,250 B1 discloses the use of a mixture consisting of an electron transport material, a hole transport material and a fluorescent emitter in the emission layer of an OLED. With the help of this mixture, the life of the OLED over the prior art could be improved.

No. 6,803,720 B1 discloses the use of a mixture comprising a phosphorescent emitter and a hole and an electron transport material in the emission layer of an OLED. Both the hole and the electron transport material are small organic molecules. For example, according to WO 2015/169412, triazine-dibenzofuran-carbazole derivatives and triazine-dibenzothiophene-carbazole derivatives can also be used in a mixture. For example, the

Preparation of the OLED labeled E34 described in the emitting layer, the host materials EG1, IC6 and the

contains phosphorous emitter TEG1. The structures of

The compounds used are listed below:

According to WO 2018/016742, for example, triazine-dibenzofuran-aryl derivatives and triazine-dibenzothiophene-aryl derivatives can be used in a mixture. For example, specific triazine dibenzofuran triphenylene derivatives are combined with a specific biscarbazole and an emitter in an EML. As an example, the combination of compound 4 with biscarbazole PH-2 and emitter GD-1 is listed, as shown in the following table:

The compound H of the formula Training H

is used for comparison purposes in a single host system.

According to US 2017/0054087, a combination of specific triazine-dibenzofuran-aryl derivatives or specific triazine-dibenzothiophene-aryl derivatives with specific biscarbazole derivatives in a so-called premix system, a premix, for the preparation of

light emitting devices are used. As an example, three premixes are given in the following table:

According to EP3043398 A1, a combination of specific triazine-dibenzofuran-aryl derivatives or specific triazine-dibenzothiophene-aryl derivatives with specific carbazole derivatives for the preparation of

light emitting devices are used. As an example, two material combinations are given in the following table:

According to US 2016/093808, a ternary mixture of specific triazine derivatives can be used for the production of organic layers for organic electronic devices, for example the mixture TPMI (compound H8, compound C74 and compound H17) and the mixture of compounds C83, F20 and F18. The structures are given in the following table:

However, when using these materials or in the

Use of mixtures of materials still needs improvement, especially in terms of efficiency, operating voltage and / or

Life of the organic electronic device.

Object of the present invention is therefore to provide materials which are suitable for use in an organic

electronic devices, in particular in an organic

Electroluminescent devices, and in particular in a

fluorescent or phosphorescent OLED and good device properties, in particular with regard to improved efficiency, improved operating voltage and / or improved

Lifetime, lead, as well as the provision of the corresponding electronic device.

It has now been found that compositions comprising compounds of the formula (1), for example particularly preferably triazine-dibenzofuran fluorene derivatives or triazine-dibenzothiophene fluorene derivatives, and a hole-transporting host of the formula (2), achieve this object and overcome the disadvantages eliminate the prior art. Such compositions lead to very good properties of organic electronic devices, in particular organic electroluminescent devices, in particular in terms of efficiency, operating voltage and / or lifetime, and in particular even in the presence of a light-emitting component in the

Emission layer at concentrations between 2 and 15 wt .-%.

A first object of the present invention is therefore a

Composition comprising at least one compound of the formula (1) and at least one compound of the formula (2)

Formula (2)

where the symbols and indices used are:

X is the same or different CR ° or N at each occurrence, with the proviso that at least two groups X are N;

Y is selected from O or S;

L is the same or different at each occurrence as a single bond or an aromatic ring system with 6 to 30

aromatic ring atoms which may be substituted by one or more radicals R ⁵ ;

Li _, 2 are the same or different at each occurrence

Single bond or an aromatic or heteroaromatic ring system having from 5 to 30 aromatic ring atoms which may be substituted by one or more R ³ radicals; L ₃ is a single bond or an aromatic or

heteroaromatic ring system with 5 to 30 aromatic

Ring atoms, which may be substituted by one or more radicals R ³ , wherein a substituent R ¹ on the carbazole with a

Substituents R ³ can form a ring;

An, Ar2 are each independently in each occurrence an aryl or heteroaryl group having 5 to 40 aromatic ring atoms, which may be substituted ³ with one or more radicals R;

RA is H, -L ₃ -Ar ₄ , -Li-N (Ar) ₂ ;

RB is Ar ₃ or -l_ 2 -N (Ar) 2;

Ar ₃ is an aromatic ring system with 6 to 40 aromatic

Ring atoms or a heteroaromatic ring system having 10 to 40 aromatic ring atoms, which may be substituted by one or more radicals R ³ ;

Ar ₄ is the same or different at each instance and is an unsubstituted or substituted 9-aryl-carbazolyl or unsubstituted or substituted carbazol-9-yl which may be substituted by one or more R ⁴ radicals and independently of one another, each time two or more radicals R ⁴ or a radical R ⁴ together with a radical R ^{1 can form} a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring, wherein aryl denotes an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms which may be substituted by R ³ ;

R * is the same or different at each occurrence as a straight-chain alkyl group having 1 to 10 C atoms or an aryl group having 6 to 12 C atoms, where two substituents R * together form a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system which may be substituted with one or more substituents R ⁵ ;

R °, R, R ¹ are identically or differently selected on each occurrence from the group consisting of H, D, F, Cl, Br, I, CN, NO ₂ , N (Ar) ₂ , N (R ² ) ₂ , C (= O) Ar, C (= O) R ² , P (= O) (Ar) ₂ , P (Ar) ₂ , B (Ar) ₂ , Si (Ar) ₃ , Si (R ² ) 3, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 20 C atoms or a branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 20 C atoms or an alkenyl group having 2 to 20 C. Atoms each of which may be substituted with one or more R ² radicals, one or more non-adjacent CH ₂ groups represented by R ² C = CR ² , Si (R ² ) ₂ , C = O, C = S, C = NR ² , P (= O) (R ² ), SO, SO ₂ , NR ² , O, S or CONR ² may be replaced and wherein one or more H atoms are represented by D, F, Cl, Br, I , CN or N0 ₂ may be substituted, an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, each of which may be substituted by one or more R ² , an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms, with one or a plurality of R ² may be substituted, or an aralkyl or

Heteroaralkylgruppe having 5 to 40 aromatic ring atoms, which may be substituted by one or more radicals R ² ; optionally two substituents R ° and / or R and / or R ¹ attached to the same carbon atom or to adjacent ones

Carbon atoms, form a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system which may be substituted by one or more radicals R ² ;

R ² is the same or different on each occurrence selected from the group consisting of H, D, F, Cl, Br, I, CN, NO ₂ , N (Ar) ₂ , NH ₂ ,

N (R ³ ) ₂ , C (= O) Ar, C (= O) H, C (= O) R ³ , P (= O) (Ar) ₂ , a straight-chain alkyl, alkoxy or thioalkyl group with 1 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy or

Thioalkyl group having from 3 to 40 carbon atoms or an alkenyl or alkynyl group having from 2 to 40 carbon atoms, each of which may be substituted with one or more R ³ radicals, one or more non-adjacent CFI ₂ groups represented by FIC = CFI , R ³ C = CR ³ , C = Se, C = NR ³ , or CONR ³ may be replaced and wherein one or more H atoms may be replaced by D, F, Cl, Br, I, CN or N0 ₂ , an aromatic or heteroaromatic ring system having 5 to 60 aromatic

Ring atoms each of which may be substituted with one or more R ³ radicals, an aryloxy or heteroaryloxy group having from 5 to 60 aromatic ring atoms which may be substituted with one or more R ³ radicals, or a combination of these systems optionally with two or more adjacent substituents R ^{2 may form} a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system which may be substituted by one or more R ³ radicals;

R ³ is the same or different on each occurrence selected from the group consisting of H, D, F, CN, N (Ar) ₂ , an aliphatic

Hydrocarbon radical having 1 to 20 carbon atoms or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, in which one or more H atoms may be replaced by D, F, Cl, Br, I or CN and the may be substituted by one or more alkyl groups each having 1 to 4 carbon atoms; two or more adjacent substituents R ^{3 may} together form a mono- or polycyclic, aliphatic ring system;

R ⁴ is identically or differently chosen on each occurrence from the group consisting of H, D, F, CN, an aliphatic hydrocarbon radical having 1 to 20 C atoms or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, in which one or more H atoms through D, F, CI, Br,

I, a straight-chain or branched alkyl group having 1 to 4

Carbon atoms or CN may be replaced; two or more adjacent substituents R ^{4 may} together form a mono- or polycyclic ring system; R ⁵ is the same or different selected on each occurrence from the group consisting of D, F, CN and an aryl group having 6 to 18 carbon atoms, while two or more adjacent substituents R ⁵ together with a mono- or polycyclic, ali form a phatic ring system;

Ar is the same or different at each occurrence, an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, which may be substituted with one or more non-aromatic radicals R ³ ; in this case, two radicals Ar, which bind to the same N atom, P atom or B atom, also by a single bond or a bridge selected from N (R ³ ), C (R ³ ) ₂ , O or S, with each other be bridged and

n and m independently of each other denote 0, 1, 2 or 3,

o means independently at each occurrence 0, 1, 2, 3, 4, 5, 6 or 7; q independently of each occurrence represents 0, 1, 2 or 3;

p independently of each occurrence means 0, 1, 2, 3 or 4.

Other objects of the invention include special ones

Material combinations, formulations, such

Contain compositions that use this

Compositions in an organic electronic device, organic electronic devices, preferred

Electroluminescent devices containing such compositions, preferably containing the composition in a layer, as well as methods for Fierstellung of such devices. The corresponding preferred embodiments, as described below, are also the subject of the present invention. The surprising and beneficial effects are due to specific Selection of known materials achieved, in particular, as regards the selection of the compounds of formula (1).

The layer comprising the composition comprising at least one

Compound of the formula (1) and at least one compound of the formula (2), as described above or preferably described below, is in particular an emitting layer (EML), an electron transport layer (ETL), an electron injection layer (EIL) and / or a hole blocking layer (HBL).

When it is an emitting layer, it is preferably a phosphorescent layer which is characterized by having, in addition to the composition comprising the matrix materials of the formula (1) and the formula (2) as described above

contains phosphorescent emitter.

Adjacent carbon atoms in the context of the present invention are carbon atoms which are directly linked to one another. Under the formulation that two or more residues together

In the context of the present description, it should be understood, inter alia, that the two radicals are linked to one another by a chemical bond with formal cleavage of two hydrogen atoms. This is illustrated by the following scheme.

Furthermore, under the above formulation but also

be understood that in the event that one of the two radicals

Is hydrogen, the second residue to form a ring to the Position to which the hydrogen atom was bonded binds. This will be illustrated by the following scheme:

An aryl group in the context of this invention contains 6 to 40 aromatic ring atoms, preferably C atoms. For the purposes of this invention, a heteroaryl group contains 5 to 40 aromatic ring atoms, the ring atoms comprising C atoms and at least one heteroatom, with the proviso that the sum of C atoms and heteroatoms gives at least 5. The heteroatoms are preferably selected from N, O and / or S. Here, an aryl group or heteroaryl group is either a simple aromatic cycle, ie phenyl, derived from benzene, or a simple heteroaromatic cycle, for example derived from pyridine, pyrimidine or thiophene or a fused aryl or heteroaryl group, for example derived from naphthalene, anthracene, phenanthrene,

Quinoline or isoquinoline, understood. An aryl group having 6 to 18 carbon atoms is therefore preferably phenyl, naphthyl, phenanthryl or

Triphenylenyl, wherein the attachment of the aryl group is not limited as a substituent. An arylene group having 6 to 18 carbon atoms is therefore preferably phenylene, naphthylene, phenanthrylene or triphenylenylene, the linking of the arylene group as a linker not

is restricted.

An aromatic ring system in the context of this invention contains 6 to 40 carbon atoms in the ring system and may be substituted by one or more radicals R ³ , wherein R ^{3 has} a meaning described below. An aromatic ring system also contains aryl groups as previously described. An aromatic ring system having 6 to 18 carbon atoms is preferably selected from phenylene, biphenylene, naphthylene, phenanthrenylene and

Triphenylenylene selected, wherein the respective aromatic ring system may be substituted by one or more radicals R ⁵ .

A heteroaromatic ring system in the context of this invention contains 5 to 40 ring atoms and at least one heteroatom and may be substituted by one or more radicals R ³ , wherein R ^{3 is} a following

has meaning described. A preferred heteroaromatic

Ring system has 10 to 40 ring atoms and at least one heteroatom and may be substituted by one or more R ³ radicals, wherein R ^{3 has} a meaning described below. A heteroaromatic

Ring system also contains heteroaryl groups as previously described. The heteroatoms in the heteroaromatic ring system are preferably selected from N, O and / or S.

For the purposes of this invention, an aromatic or heteroaromatic ring system is understood as meaning a system which does not necessarily contain only aryl or heteroaryl groups, but in which also several aryl or heteroaryl groups are present through a non-aromatic unit

(Preferably, less than 10% of the atoms other than H), such as. As a C, N or O atom or a carbonyl group, may be interrupted. For example, systems such as 9,9'-spirobifluorene, 9,9-diaryl fluorene, triarylamine, diaryl ether, stilbene, etc. as aromatic or

Heteroaromatic ring systems are understood within the meaning of this invention, and also systems in which two or more aryl groups are interrupted, for example, by a linear or cyclic alkyl group or by a silyl group. Furthermore, systems in which two or more aryl or heteroaryl groups are bonded directly to each other, such as. As biphenyl, terphenyl, quaterphenyl or bipyridine, also included in the definition of the aromatic or heteroaromatic ring system. Under an aromatic or heteroaromatic ring system with 5-40 aromatic ring atoms, which still in each case with the mentioned

R ³ radicals can be substituted and which can be linked via any position on the aromatic or heteroaromatic, are understood, for example, groups derived from benzene, naphthalene, anthracene, Benzanthracen, phenanthrene, Benzophenanthren, pyrene, chrysene, perylene, fluoranthene , Benzfluoranthene, naphthacene, pentacene, benzpyrene, biphenyl, biphenylene, terphenyl, terphenylene, fluorene, spirobifluorene, dihydrophenanthrene, dihydropyrene, tetrahydropyrene, cis- or trans-indenofluorene, cis- or trans-monobenzoindenofluorene, cis- or trans-dibenzoindenofluorene, Truxene, isotruxene, spirotruxene, spiroisotruxene, furan, benzofuran, isobenzofuran, dibenzofuran, thiophene, benzothiophene, isobenzothiophene, dibenzothiophene, pyrrole, indole, isoindole, carbazole, indolocarbazole, indenocarbazole, pyridine, quinoline, isoquinoline, acridine, phenanthridine, benzoin. 5,6-quinoline, benzo-6,7-quinoline, benzo

7.8-quinoline, phenothiazine, phenoxazine, pyrazole, indazole, imidazole,

Benzimidazole, naphthimidazole, phenanthrimidazole, pyrimididazole, pyrazine imidazole, quinoxalinimidazole, oxazole, benzoxazole, naphthoxazole,

Anthroxazole, phenanthroxazole, isoxazole, 1, 2-thiazole, 1, 3-thiazole, benzothiazole, pyridazine, benzopyridazine, pyrimidine, benzpyrimidine, quinoxaline, 1, 5-diazaanthracene, 2,7-diazapyrene, 2,3-diazapyrene, 1, 6-diazapyrene,

1,8-diazapyrene, 4,5-diazapyrene, 4,5,9,10-tetraazaperylene, pyrazine, phenazine, phenoxazine, phenothiazine, fluorubin, naphthyridine, azacarbazole, benzocarboline, phenanthroline, 1, 2,3-triazole, 1, 2, 4-triazole, benzotriazole, 1, 2,3-oxadiazole, 1, 2,4-oxadiazole, 1, 2,5-oxadiazole, 1, 3,4-oxadiazole, 1, 2,3-thiadiazole, 1, 2, 4-thiadiazole, 1, 2,5-thiadiazole, 1, 3,4-thiadiazole, 1, 3,5-triazine, 1, 2,4-triazine, 1, 2,3-triazine, tetrazole, 1, 2, 4,5-tetrazine, 1, 2,3,4-tetrazine, 1, 2,3,5-tetrazine, purine, pteridine, indolizine and benzothiadiazole. The abbreviation Ar is identical or different at each occurrence to an aromatic or heteroaromatic ring system having 5 to 30

aromatic ring atoms, which may contain one or more non-aromatic aromatic radicals R ³ may be substituted; in this case, two radicals Ar, which bind to the same N atom, P atom or B atom, also by a single bond or a bridge selected from N (R ³ ), C (R ³ ) 2, O or S, with each other be bridged. The substituent R ³ has been previously described or will be described below.

A cyclic alkyl, alkoxy or thioalkyl group in the context of this invention is a monocyclic, a bicyclic or a

understood polycyclic group.

In the context of the present invention, a C 1 - to C 20 -alkyl group in which individual H atoms or C groups can also be substituted by the abovementioned groups, for example the radicals methyl, ethyl, n-propyl, i-propyl, Cyclopropyl, n-butyl, i-butyl, s-butyl, t-butyl, cyclobutyl, 2-methylbutyl, n-pentyl, s-pentyl, t-pentyl, 2-pentyl, neo-pentyl, cyclopentyl, n-hexyl, s-hexyl, t -hexyl, 2-hexyl, 3-hexyl, neohexyl, cyclohexyl, 1-methylcyclopentyl, 2-methylpentyl, n-heptyl, 2-heptyl, 3-heptyl, 4-heptyl, cycloheptyl, 1- Methylcyclohexyl, n-octyl, 2-ethylhexyl, cyclooctyl, 1-bicyclo [2,2,2] octyl, 2-bicyclo [2,2,2] octyl, 2- (2,6-dimethyl) octyl, 3- ( 3,7-dimethyl) octyl, adamantyl, trifluoromethyl, pentafluoroethyl, 2,2,2-trifluoroethyl, 1, 1-dimethyl-n-hex-1-yl, 1, 1-dimethyl-n-hept-1 -yl, 1, 1-dimethyl-n-oct-1-yl, 1, 1-dimethyl-n-dec-1-yl, 1, 1-dimethyl-n-dodec-1-yl, 1 , 1-Dimethyl-n-tetradec-1-yl, 1, 1-dimethyl-n-hexadec-1-yl, 1, 1-dimethyl-n-octade c-1-yl, 1, 1-diethyl-n-hex-1-yl, 1, 1-diethyl-n-hept-1-yl, 1, 1-diethyl-n-oct-1-yl -, 1, 1-diethyl-n-dec-1-yl, 1, 1-diethyl-n-dodec-1-yl, 1, 1-diethyl-n-tetradec-1 -yl-, 1, 1 Diethyln-n-hexadec-1-yl, 1,1-diethyl-n-octadec-1-yl, 1 - (n-propyl) -cyclohex-1-yl, 1 - (n-butyl) - cyclohex-1-yl, 1 - (n-hexyl) -cyclohex-1-yl, 1- (n-octyl) -cyclohex-1-yl and 1 - (n-decyl) cyclohex-1-yl - Roger that. An alkenyl group is understood as meaning, for example, ethenyl, propenyl, butenyl, pentenyl, cyclopentenyl, hexenyl, cyclohexenyl, heptenyl, cycloheptenyl, octenyl, cyclooctenyl or cyclooctadienyl. By an alkynyl group is meant, for example, ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl or octynyl. A C 1 to C 20 alkoxy group is understood as meaning, for example, methoxy, trifluoromethoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy or 2-methylbutoxy.

A C 1 to C 20 thioalkyl group is understood to mean, for example, S-alkyl groups, for example thiomethyl, 1-thioethyl, 1-thio-i-propyl, 1-thio-n-propoyl, 1-thio-i-butyl, 1-thio n-butyl or 1-thio-t-butyl.

An aryloxy or heteroaryloxy group with 5 to 40 aromatic

Ring atoms means O-aryl or O-heteroaryl and means that the aryl or heteroaryl group is bonded via an oxygen atom.

An aralkyl or heteroaralkyl group having from 5 to 40 aromatic

Ring atoms means that an alkyl group as described above is substituted with an aryl group or heteroaryl group.

A phosphorescent emitter in the context of the present invention is a compound which exhibits luminescence from an excited state with a higher spin multiplicity, ie a spin state> 1, in particular from an excited triplet state. For the purposes of this application, all luminescent complexes with transition metals or lanthanides are to be regarded as phosphorescent emitters. A more precise definition is given below.

When the composition comprising at least one compound of formula (1) as described above or preferred below

described, and at least one compound of formula (2), as described above or described below, as a matrix material for a phosphorescent emitter is used, it is preferred if their triplet energy is not substantially smaller than the triplet energy of the phosphorescent emitter. In this case, preference is given to the triplet level Ti (emitter) - Ti (matrix) <0.2 eV, more preferably <0.15 eV, most preferably <0.1 eV. Here, Ti (matrix) is the triplet level of the matrix material in the emission layer, which condition applies to each of the two matrix materials, and Ti (emitter) is the triplet level of the phosphorescent emitter. If the emission layer contains more than two matrix materials, the above-mentioned relationship preferably also applies to any further matrix material.

In a preferred embodiment of the invention, compounds of the formula (1) are selected in which Y is selected from O or S, preferably O means.

In compounds of formula (1) the symbol X stands for N twice and once for CR ° or three times for N.

The substituent

therefore has the following meanings, where ^* denotes the point of attachment to the dibenzofuran or dibenzothiophene and R °, Ar ¹ and Ar ^{2 have} one of the meanings given above or have a preferred meaning:

R ° at each occurrence is the same or different preferably selected from the group consisting of H, D, F or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms. R ° is particularly preferred at each occurrence H.

Compounds of the formula (1) in which X in each occurrence is N are represented by the formula (1 a),

wherein Y, L, An, Ar2, R, R ^5, R ^*, n, m and o an above-mentioned

Have meaning or have a meaning given below.

More preferably, at least one compound of formula (1a) is selected for the composition, with substituents previously mentioned

described, preferably described or described below preferred.

Another object of the invention is therefore a

A composition as described above, wherein the compound of formula (1) corresponds to the compound of formula (1 a), preferably when the symbol Y corresponds to O.

In compounds of the formulas (1) or (1a) or preferably described compounds of the formulas (1) or (1a), An and Ar 2 are each, independently of one another, preferably an aryl group having from 6 to 40 carbon atoms. Atoms as described above or preferably described, which may be substituted by one or more radicals R ³ , or for a

Dibenzofuranyl or dibenzothiophenyl group which may be substituted with one or more R ³ radicals.

The linking of the aryl group or the dibenzofuranyl or

Dibenzothiophenyl group is not restricted.

An and Ar 2 may therefore preferably be selected from the following groups Ar-1 to Ar-12, where R ^{3 has} a meaning given above or preferably indicated:

More preferably at least one An or Ar 2 is phenyl and the other aromatic substituent is an aryl group having from 6 to 40 carbon atoms. Atoms which may be substituted by one or more radicals R ³ or a dibenzofuranyl or a dibenzothiophenyl group, preferably selected from Ar-1 to Ar-12. More preferably, at least one An or Ar 2 is phenyl and the other is aromatic

Substituent stands for a phenyl group containing one or more

R ³ may be substituted or for dibenzofuranyl. Most preferably, both groups An and Ar2 are the same. Most preferably, both groups An and Ar 2 are phenyl or both

Groups An and Ar2 represent dibenzofuranyl.

When in compounds of the formulas (1) or (1a) or preferably described compounds of the formulas (1) or (1a) An and Ar2, as previously described or preferably described, an aryl or

Fleteroaryl group which are substituted by one or more radicals R ³ , the substituent R ³ is the same or different preferably selected on each occurrence from the group consisting of D, F or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms. The heteroaromatic ring system having 5 to 40 aromatic ring atoms in this case is preferably derived from dibenzofuran or dibenzothiophene for R ³ . The aromatic ring system having 6 to 40 aromatic ring atoms in this case is preferably phenyl, biphenyl or terphenyl, particularly preferably phenyl or R ³

[1, 1 ', 2', 1 "] -Terphenyl-5'-yl. Preference is given to the aryl group or

Fleteroaryl group in An and Ar2 each independently substituted once with R ³ . Particularly preferred is the aryl group or

Fleteroaryl group in An or Ar2 substituted once with R ³ .

The substituent R ³ on dibenzofuranyl or dibenzothiophenyl is preferably Fl. The substituent R ³ on the aryl group having 6 to 40 carbon atoms is preferably phenyl or Fl when it occurs. Most preferably, the aryl group or fleteroaryl group is unsubstituted in An and Ar 2. In compounds of the formulas (1) or (1a) or preferably described compounds of the formulas (1) or (1a), the substituent R * is, identically or differently, a straight-chain alkyl group having 1 to 10 C atoms or an aryl group at each occurrence 6 to 12 carbon atoms, where the two substituents R * may together form a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system which may be substituted by one or more substituents R ⁵ . R * is preferably the same at each occurrence or two substituents R ^* together form a monocyclic or polycyclic,

aliphatic, aromatic or heteroaromatic ring system.

More preferably R * is selected from methyl, ethyl or phenyl. Particularly preferably, two substituents R * together with the C atom to which they are attached form a ring system selected from

Cyclopentyl or dibenzocyclopentyl with one or more

Substituents R ⁵ may be substituted. The ring system formed by two substituents R * particularly preferably corresponds to a spirobifluorene.

Compounds of the formula (1) in which the substituents R * are a

are preferred as described above, are represented by formulas (1b), (1c), (1d), (1e) or (1f),

Formula (1 b) where X, Y, L, An, Ar ₂ , R, R ⁵ , n, m and o have the meaning given above or preferably indicated meaning or one have the meaning given below and p is 0, 1, 2, 3, 4, 5, 6, 7 or 8.

In compounds of the formulas (1), (1a), (1b), (1c), (1d), (1e) and (1f) or in preferably described compounds of the formulas (1), (1a) , (1 b), (1 c),

(1 d), (1e) and (1f) n is preferably 0 or 1, wherein R has the meaning given above or has the meaning given below. N is particularly preferred. In compounds of the formulas (1), (1a), (1 b), (1c), (1 d), (1e) and (1f) or in compounds of the formulas (1) which are preferably described. , (1 a), (1 b), (1 c),

(1d), (1e) and (1f) m is preferably 0 or 1, where R is a previously

has the meaning given or a meaning given below. Particularly preferred is m 0.

In compounds of the formulas (1), (1a), (1b), (1c), (1d), (1e) and (1f) or in preferably described compounds of the formulas (1), (1a), (1 b), (1 c),

(1 d), (1e) and (1f) is the sum of n and m, abbreviated (n + m), preferably 0, 1 or 2, wherein R has the meaning given above or has the meaning given below. More preferably, (n + m) is 0 or 1. Most preferably, (n + m) is 0.

In compounds of formulas (1), (1 a), (1 b), (1 c), (1 d), (1 e) and (1f) or in preferably described compounds of the formulas (1), (1 a ), (1 b), (1 c), (1 d), (1 e) and (1 f) o is preferably 0, 1 or 2, wherein R ^{5 has} a meaning given above or has the meaning given below. Particularly preferred is o 0.

In compounds of the formula (1f) or preferably described

Compounds of the formula (1f) p is preferably 0, 1 or 2, where R ^{5 has} a meaning given above or one given below

Meaning has. Particularly preferred is p 0. When in compounds of the formulas (1), (1 a), (1 b), (1c), (1 d), (1 e) and (1f) or in compounds of the formulas (1), (1 a) preferably described ), (1 b), (1 c), (1 d), (1 e) and (1 f) n or m is greater than 0, then the substituent R in each occurrence is the same or different preferably selected from

Group consisting of D, F, an alkyl group having 1 to 40 carbon atoms or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms. The heteroaromatic ring system with 5 to 40 aromatic ring atoms in this case is preferably derived from R for dibenzofuran or dibenzothiophene. The aromatic ring system having 6 to 40 aromatic ring atoms in this case is preferably phenyl, biphenyl or terphenyl, particularly preferably phenyl or [1, 1 ', 2', 1 "] - terphenyl-5'-yl up to 40 carbon atoms in this case, R is preferably a linear or branched alkyl group having 1 to 4 C atoms, particularly preferably methyl, ethyl, n-propyl or n-butyl, very particularly preferably methyl.

When in compounds of the formulas (1), (1 a), (1 b), (1c), (1 d), (1 e) and (1f) or in compounds of the formulas (1), (1 a) preferably described ), (1 b), (1 c), (1 d), (1e) and (1f) o or p is greater than 0, the substituent R ⁵ in each occurrence is the same or different preferably selected from the group consisting of D or phenyl.

In compounds of the formulas (1), (1a), (1b), (1c), (1d), (1e) and (1f) or in preferably described compounds of the formulas (1), (1a), (1 b), (1c),

(1 d), (1e) and (1f) L is the same or different at each occurrence as a single bond or an aromatic ring system of 6 to 30

aromatic ring atoms which may be substituted by one or more radicals R ⁵ , wherein R ^{5 has} a meaning, as before

described. R ⁵ is preferably selected from the group consisting of D or phenyl. Preferably L is a single bond or an aromatic ring system having 6 to 18 carbon atoms, preferably phenylene, Biphenylene, naphthylene, phenanthrenylene or triphenylenylene, wherein the connection to the other substituents is not limited. In this case, phenylene can be linked, for example, in the ortho, meta or para position with the dibenzofuran / dibenzothiophene unit and the fluorenyl unit.

L can therefore preferably be selected from the following linkers L-1 to L-20 which are unsubstituted or may be substituted by R ⁵ as described above:

Preferably, the linkers L-1 to L-20 are unsubstituted.

Most preferably, the linkers L-1 to L-7 are used. Preferably, L is linked as phenylene in the meta position.

In compounds of the formulas (1), (1a), (1b), (1c), (1d), (1e) and (1f) or in preferably described compounds of the formulas (1), (1a), (1 b), (1 c), (1 d), (1 e) and (1 f) L may be bonded in any position to the fluorenyl. L, as described above or described as preferred, is more preferably linked to position 2 and 4 of the fluorenyl radical, most preferably linked to position 2 of the fluorenyl radical.

L, as described above or described as preferred, is preferably linked in position 2, 3 or 4 of the bispirofluorenyl radical, or very particularly preferably linked in position 2 of the bispirofluorenyl radical.

Particularly preferred compounds of the formula (1) correspond to the formulas (1d) and (1 f), as described above.

Another object of the invention are also specific

Compounds of the formula (1 a)

where the symbols and indices used are:

Y is selected from O or S;

L is identical or different at each instance and is an aromatic ring system having 6 to 18 C atoms, preferably phenylene, biphenylene, naphthylene, phenanthrenylene or triphenylenylene, which may be substituted by one or more radicals R ⁵ ; An, Ar2 are each independently in each occurrence an aryl or heteroaryl group having 5 to 40 aromatic ring atoms, which may be substituted ³ with one or more radicals R;

R * is the same or different at each occurrence as a straight-chain alkyl group having 1 to 10 C atoms or an aryl group having 6 to 12 C atoms, where two substituents R * together form a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system may be substituted with one or more R ⁵ ;

R is the same or different at each occurrence selected from the group consisting of D, F, CN or an aryl group having 6 to 10 carbon atoms;

R ³ in each occurrence is identically or differently selected from the group consisting of H, D, F, CN, N (Ar) 2, an aliphatic hydrocarbon radical having 1 to 20 C atoms or an aromatic or heteroaromatic ring system having 5 to Aromatic ring atoms in which one or more H atoms can be replaced by D, F, Cl, Br, I or CN and which may be substituted by one or more alkyl groups each having 1 to 4 carbon atoms, in which case two or more more adjacent substituents R ³ together form a mono- or polycyclic aliphatic ring system;

R ⁵ is the same or different on each occurrence selected from the group consisting of D, F, CN and an aryl group having 6 to 18 carbon atoms, while two or more adjacent substituents R ⁵ together form a mono- or polycyclic aliphatic ring system ;

n and m independently of each other denote 0, 1, 2 or 3 and each

o means independently at each occurrence 0, 1, 2, 3, 4, 5, 6 or 7. The meanings given as preferred for Y, L, Ar ¹ , Ar ² , R, R ³ , R ⁵ , R ^* , n, m and o apply correspondingly, as described above.

Accordingly, the preferred compounds of the following formulas (1 g), (1 h), (1 i), (1j) and (1 k) are likewise provided by the invention,

wherein Y, An, Ar2, R, R ^5, n, m, o and p is a defined above or, preferably, have the meaning given and q is 0, 1, 2, 3 or 4. If q is greater than 0, R ^{5 is} preferably D or phenyl.

In compounds of formulas (1), (1 a), (1g), (1h), (1i), (1j) and (k-1) Y is preferably O, Ar ¹ and Ar ² are preferably phenyl, dibenzofuranyl .

Dibenzothiophenyl and biphenyl as described above and n, m, o, p and q are preferably 0.

Compounds of formulas (1g), (1h), (1i), (1j) and (1k) are preferably selected for the composition of the invention.

Compounds of the formula (1 k) are preferably the subject of the invention or are particularly preferred for the inventive

Composition selected, wherein the symbols used have a specified or preferred meaning. Examples of suitable compounds of the formulas (1), (1 a), (1 b), (1 c), (1 d), (1 e), (1 f), (1 g), (1 h), (1 i ), (1j) and (1k), which are selected according to the invention, are the structures of Table 1 below.

Table 1:

30 -41

-42

-44

-46

-48

-51

-71

30

30 -81

30 -91

I111

30

Particularly suitable compounds of formula (1), (1a), (1b), (1c), (1d), (1e), (1f), (1g), (1h), (1i), (1j ) or (1k), which are selected according to the invention, are the compounds 1 to 11 of Table 2.

Table 2:

The preparation of the compounds of the formula (1) or of the preferred compounds of the formulas (1a) to (1k) and of the compounds 1 to 11 is known to the person skilled in the art. The compounds can after the

Expert known synthesis steps, such as halogenation, preferably bromination, and a subsequent organometallic coupling reaction, eg Suzuki coupling, Heck coupling or Hartwig-Buchwald coupling, are produced. The preparation of the compounds of the formula (1) or of the preferred compounds of the formulas (1a) to (1k) and the compounds 1 to 11 can be derived in particular from WO 2015/169412, in particular page 63 and the synthesis examples of pages 77 to 114.

The preparation of the compounds of the formulas (1) to (1 f), where L is a single bond, can be carried out according to the following scheme 1, where X, Y, R *, An, Ar 2 has one of the meanings given above and R in Scheme 1 an alkyl group having 1 to 4 carbon atoms.

Scheme 1

The preparation of the compounds of the formulas (1) to (1 k) in which L is a linker group can be carried out according to the following scheme 2, wherein X, Y, R *, An, Ar 2 has one of the meanings given above.

Scheme 2:

Hole transporting hosts correspond to the formula (2),

Formula (2)

where the symbols and indices used are:

RA is H, -L3-Ar ₄ or -Li-N (Ar) 2;

RB is Ar3 or -L2-N (Ar) 2;

Li _, L2 _{, the} same or different at each occurrence, a single bond or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, which may be substituted by one or more radicals R ³ ;

L3 is a single bond or an aromatic or

heteroaromatic ring system with 5 to 30 aromatic

Substituents R ³ can form a ring; AG ₃ is an aromatic ring system with 6 to 40 aromatic

R ¹ is the same or different at each occurrence selected from the

Group consisting of H, D, F, Cl, Br, I, CN, NO 2, N (Ar) 2, N (R ² ) 2, C (= O) Ar, C (= O) R ² , P (= 0) (Ar) ₂ , P (Ar) ₂ , B (Ar) ₂ , Si (Ar) ₃ , Si (R ² ) ₃ , a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 20 carbon atoms or a branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 20 C atoms or an alkenyl group having 2 to 20 C atoms, each of which may be substituted by one or more R ² radicals, one or more non-adjacent CF 3 Groups by R ² C = CR ² , Si (R ² ) 2, C = O, C = S, C = NR ² , P (= O) (R ² ), SO, SO ₂ , NR ² , O, S or CONR ² can be replaced and wherein one or more H atoms by D, F, CI, Br, I,

CN or NO2 may be replaced, an aromatic or heteroaromatic ring system with 5 to 40 aromatic

Ring atoms, each of which may be substituted with one or more R ² , an aryloxy or Fleteroaryloxygruppe having 5 to 40 aromatic ring atoms, which with one or more

R ² may be substituted, or an aralkyl or

Fleteroaralkylgruppe with 5 to 40 aromatic ring atoms, which with one or more radicals R ² may be substituted; optionally two substituents R ° and / or R and / or R ¹ attached to the same carbon atom or to adjacent ones

Carbon atoms are bonded, a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic

Form a ring system which may be substituted by one or more radicals R ² ;

R ² is the same or different on each occurrence selected from the group consisting of H, D, F, Cl, Br, I, CN, NO 2, N (Ar) 2, NH 2, N (R ³ ) ₂ , C (= 0 ) Ar, C (= O) H, C (= O) R ³ , P (= 0) (Ar) ₂ , a straight-chain

Alkyl, alkoxy or thioalkyl group having 1 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy or

Thioalkyl group having from 3 to 40 carbon atoms or an alkenyl or alkynyl group having from 2 to 40 carbon atoms, each of which may be substituted by one or more R ³ radicals, one or more non-adjacent CFh groups represented by HC = CH, R ³ C = CR ³ ,

C = Se, C = NR ³ , or CONR ³ may be replaced and wherein one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO ² , an aromatic or heteroaromatic ring system having 5 to 60 aromatic

Ring atoms which may each be substituted by one or more radicals R ³ , an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms which may be substituted by one or more radicals R ³ , or a combination thereof

Systems wherein optionally two or more adjacent substituents R ^{2 may form} a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system which may be substituted with one or more R ³ radicals; R ³ is the same or different at each occurrence selected from the group consisting of H, D, F, CN, N (A, an aliphatic Hydrocarbon radical having 1 to 20 carbon atoms or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, in which one or more H atoms may be replaced by D, F, Cl, Br, I or CN and the may be substituted by one or more alkyl groups each having 1 to 4 carbon atoms; two or more adjacent substituents R ^{3 may} together form a mono- or polycyclic, aliphatic ring system;

R ⁴ is identically or differently chosen on each occurrence from the group consisting of H, D, F, CN, an aliphatic hydrocarbon radical having 1 to 20 C atoms or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, in which one or more Fl atoms by D, F, CI, Br,

I, a straight-chain or branched alkyl group having 1 to 4

Carbon atoms or CN may be replaced; two or more adjacent substituents R ^{4 may} together form a mono- or polycyclic ring system;

independently of each other means 0, 1, 2 or 3 at each occurrence;

P independently of each occurrence represents 0, 1, 2, 3 or 4. In one embodiment of the invention, compounds of the formula (2) are selected as described above, which are reacted with compounds of the formulas (1), (1 a), ( 1 b), (1 c), (1 d), (1 e), (1 f), (1 g), (1 h), (1 i), (1 j) and (1 k), as before described or preferably described, or with the compounds of Table 1 or the compounds 1 to 11, are used in the composition.

Compounds of the formula (2) can be represented by the following formulas (2a), (2b) (2c) and (2d)

Formula (2d)

wherein Li, L2, L3, Ar, Ar 3, Ar _4, R ^1, p and q have a foregoing or the following stated meaning.

Preferred compounds of the formula (2a) are compounds of the formulas (2e), (2f), (2g), (2h) and (2i),

wherein RB, Ar, R ¹ , R ⁴ , q and p have the same meaning as or below, l_ ₃ in the formulas (2h) and (2i)

aromatic or heteroaromatic ring system with 5 to 30

represents aromatic ring atoms which may be substituted by one or more radicals R ³ , where a substituent R ¹ on the carbazole with a substituent R ³ may form a ring, r and s are each independently 0, 1, 2, 3 or 4, Z is C (R ¹ ) 2, N-Ar, O or S and t is 0 or 1.

In compounds of the formulas (2a) to (2i), H is excluded from the definition of the substituents R ¹ if p, q, r or s are greater than 1.

Another object of the invention is therefore a

Composition as described above, wherein the compound of Formula (2) corresponds to one of the compounds of the formulas (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) or (2i).

In the compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i), a substituent R ¹ and a substituent R ^{4 form} a ring, for example in formula (2f) also defined by [Z] t, wherein preferably the following rings Z-1 to Z-7 are formed and the dashed lines represent the bond to the carbazoles:

In the compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i), two substituents R ¹ may be used - or several times together form a ring or two substituents R ⁴ may form one or more times together a ring, which is preferably selected from the following structures (S1) to (S9), where # and # are the respective

Represents linkage site with the carbon atoms and the structures may each be substituted with one or more substituents R ² :

R ² in the partial structures (S1) to (S9) is preferably H or an aromatic or heteroaromatic ring system having 5 to 40 ring atoms, which may be substituted by R ³ , preferably H or phenyl.

In the compounds of formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i), the linkers Li, L2 and L3, unless they are

Single bond are each independently selected from the linkers L-2.1 to L-2.33,

L-2.22 L-2.23 L-2.24 L-2.25 L-2.2

L-2.

L-28.02

wherein W is N-Ar, O, S or C (CH3) 2, Ar has a meaning given above, the linker L-1 to L-33 may be substituted by one or more radicals R ³ and the dashed lines connect to the carbazoles mean. For the linker L3, a radical R ³ can form a ring on one of the linkers L-2.1 to L-2.33 with a radical R ^{1 of} the carbazole. The linkers L-2.1 to L-2.33 are preferably unsubstituted or substituted by a phenyl.

Preferred linkers for Li are selected from structures L-2.1 to L-2.33 in which W is S or O, more preferably O is. Preferred linkers for L3 are selected from structures L-2.1 to L-2.33 in which W is O, S or N-Ar, more preferably O or N-Ar. In a preferred embodiment, the compounds of formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i) are the two Carbazoles each linked together in 3-position.

In compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i) q is preferably 0, 1 or 2, wherein R ^{1 is} a previously stated

Has meaning or a meaning given below. More preferably, q is 0 or 1. Most preferably, q is 0.

In compounds of formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i) q is greater than 0, then the substituent R ¹ in each

Occurs identically or differently preferably selected from the group consisting of D, F, an alkyl group having 1 to 40 carbon atoms or an aromatic or heteroaromatic ring system having 5 to 40

aromatic ring atoms which may be substituted by one or more R ² radicals. The aromatic or heteroaromatic

Ring system having 5 to 40 aromatic ring atoms in this R ¹ is preferably derived from benzene, dibenzofuran, dibenzothiophene, 9-phenyl-carbazole, biphenyl and terphenyl, which may be substituted by one or more R ² radicals. The preferred position of the

Substituents [R ¹ ] _q is position 1, 2, 3 or 4 or the combinations of positions 1 and 4 and 1 and 3, particularly preferably 1 and 3, 2 or 3, very particularly preferably 3, where R ^{1 is} one of the above given preferred meanings and q is greater than 0. Particularly preferred substituents R ¹ in [R ¹ ] _q are carbazol-9-yl, biphenyl, terphenyl and dibenzofuranyl. In compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i) r is preferably 0, 1 or 2, wherein R ^{4 has} a meaning given above or has the meaning given below. More preferably, r is 0 or 1, most preferably 0.

When in compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f),

(2g), (2h) and (2i) r is greater than 0, the substituent R ⁴ in each occurrence is the same or different preferably selected from the group consisting of D, F, an alkyl group having 1 to 20 carbon atoms or a aromatic or heteroaromatic ring system with 5 to 30

Aromatic ring atoms in which one or more Fl atoms by D, F, CI, Br, I, a straight-chain or branched alkyl group having 1 to 4

Carbon atoms or CN can be replaced. Two or more adjacent substituents R ^{4 may} together form a mono- or polycyclic ring system. The aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms in this R ⁴ is preferably derived from benzene, dibenzofuran, dibenzothiophene, 9-phenyl-carbazole, biphenyl, terphenyl and triphenylene.

The preferred position of the substituent [R ⁴ ] _r is position 1, 2 or 3, more preferably 3, wherein R ^{4 has} one of the preferred meanings given above and r is greater than 0.

In compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i) s is preferably 0, 1 or 2, wherein R ^{4 has} a meaning given above or has the meaning given below. More preferably, s is 0 or 1, most preferably 0.

When in compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f),

(2g), (2h) and (2i) s is greater than 0, the substituent R ^{4 is} preferably the same or different at each occurrence as previously described for r. Ar in N (Ar) 2 is preferably derived from benzene, dibenzofuran, fluorene, spirobifluorene, dibenzothiophene, 9-phenyl-carbazole, biphenyl and

Terphenyl which may be substituted with one or more substituents R ³ . Ar is preferably unsubstituted here.

The substituent R ² in each occurrence is the same or different preferably selected from the group consisting of D, F, Cl, Br, I, CN, NO ₂ , N (Ar) ₂ , NH ₂ , N (R ³ ) ₂ , C (= 0) Ar, C (= O) H, C (= O) R ³ , P (= O) (Ar) ₂ , a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 40 C atoms or one branched one or cyclic alkyl, alkoxy or thioalkyl group having 3 to 40 carbon atoms or an alkenyl or alkynyl group having 2 to 40 carbon atoms, each of which may be substituted by one or more R ³ radicals, an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, each of which may be substituted by one or more radicals R ³ , an aryloxy or Fleteroaryloxygruppe having 5 to 60 aromatic ring atoms, which may be substituted by one or more radicals R ³ . The substituent R ² is particularly preferably an aromatic or heteroaromatic when it occurs

Ring system as described above, preferably selected from the group carbazole, 9-phenyl-carbazole, dibenzofuran, dibenzothiophene, fluorene, terphenyl or spirobifluorene derived, most preferably derived from a dibenzofuran.

In the case of the substitution of one of the substituents R ² , as described above, with a substituent R ³ , the meanings of R ^{3 are} as described above or preferably described.

In compounds of formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i) as described above, Ar ₃ each independently aromatic ring system having 6 to 40 aromatic ring atoms or a heteroaromatic ring system having 10 to 40 aromatic ring atoms, which may be substituted by one or more radicals R ³ . Ar ₃ is preferably derived from benzene, dibenzofuran, fluorene,

Spirobifluorene, dibenzothiophene, 9-phenyl-carbazole, biphenyl and

Terphenyl which may be substituted with one or more substituents R ³ , wherein R ^{3 has} a meaning given above.

In the heteroaromatic ring systems having 10 to 40 carbon atoms, which may be substituted with one or more of the substituents R ³ , electron-rich ring systems are particularly preferred, the

optionally substituted by R ³ substituted ring system preferably contains in the entirety only one N atom or optionally substituted by R ³ substituted ring system in the entirety one or more O and / or S atoms.

Compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i) or preferably described compounds of the formulas ( 2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i), Ar3 is preferably selected from the aromatic or heteroaromatic ring systems Ar- 1 to Ar-22 selected

Ar- 15 Ar- 16 Ar- 17

Ar-20 Ar-21 Ar-22 where Y ^{3 is,} identically or differently, O, NR ^# , S or C (R ^# ) ₂ in each occurrence, the radical R ^# bound to N not being H and R ^{3 has} the meaning previously mentioned or a preferred below and the dashed bond represents the bond to the N-atom.

The radical R ^# is identical or different at each occurrence H, D, F, CI, Br,

I, CN, NO ₂ , N (Ar) ₂ , N (R ² ) ² _J C (= O) Ar, C (= O) R ² , P (= O) (Ar) ₂ P (Ar) ₂ , B (Ar) ₂

Si (Ar) 3, Si (R ² ) 3, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 20 C atoms or a branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 20 C atoms or a Alkenyl group having 2 to 20 carbon atoms, each of which may be substituted with one or more R ² radicals, wherein one or more non-adjacent CH ₂ groups by R ² C = CR ² , Si (R ² ) ₂ , C = 0, C = S, C = NR ² , P (= O) (R ² ), SO, SO ₂ , NR ² , O, S or CONR ² may be replaced and where one or more H atoms are replaced by D, F , CI, Br, I, CN or N0 ₂ may be substituted, an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, each of which may be substituted by one or more radicals R ² , a Aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms which may be substituted with one or more R ² , or an aralkyl or heteroaralkyl group having 5 to 40 aromatic ring atoms which may be substituted with one or more R ² ; Optionally, two substituents R ^# attached to the same carbon atom or to adjacent carbon atoms may form a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system which may be substituted with one or more R ² groups.

Y ³ is preferably O, S or C (CH 3) 2. Y ³ is most preferably O.

In the structures Ar-1 to Ar-22, the substituent R ³ in each occurrence is identically or differently selected from the group consisting of H, D, F, CN, an aliphatic hydrocarbon radical having 1 to 20 C atoms or an aromatic or heteroaromatic Ring system with 5 to 30 aromatic ring atoms in which one or more H atoms are represented by D,

F, CI, Br, I or CN may be replaced and may be substituted by one or more alkyl groups each having 1 to 4 carbon atoms; two or more adjacent substituents R ^{3 may} together form a mono- or polycyclic aliphatic ring system. In the structures Ar-1 to Ar-22, the substituent R ^{3 is} preferably at each

Occurs identically or differently selected from the group consisting of H, F, CN, an aliphatic hydrocarbon radical having 1 to 10 C atoms or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms. In the structures Ar-1 to Ar-22, the substituent R ^{3 is} preferably the same or different at each occurrence selected from the group consisting of Fl or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, as described above, but preferably dibenzofuran,

Dibenzothiophene, 9-phenyl-carbazole or spirobifluorene. In the structures Ar-1 to Ar-22, the substituent R ^{3 is} particularly preferable at each occurrence of H.

Examples of suitable compounds of formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i), which are selected according to the invention , the structures listed below are of Table 3.

Table 3:

30

30 Particularly suitable examples of compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i) selected according to the invention are compounds 12 to 34, as described in Table 4.

Table 4:

The preparation of the compounds of the formula (2) or the preferred compounds of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i), as well as the compounds of Table 3 and 4 is known in the art. The compounds can be synthesized according to synthetic steps known to those skilled in the art, e.g. Halogenation, preferably bromination, and a subsequent organometallic coupling reaction, e.g.

Suzuki coupling, rear coupling or Hartwig-Buchwald coupling, are produced. In part, the compounds of formula (2) are commercially available.

The aforementioned host materials of the formulas (1), (1a), (1b), (1c), (1d), (1e), (1f), (1g), (1h), ( 1 i), (1j) or (1 k) and their preferred embodiments described or the compounds of Table 1 and Table 2 can according to the invention with any of the mentioned

Host materials of the formulas (2), (2a), (2b), (2c), (2d), (2e), (2f), (2g), (2h) and (2i) and their preferred embodiments described or the compounds of Table 3 or 4.

Particularly preferred mixtures of the host materials of the formula (1) with the host materials of the formula (2) for the inventive Composition is obtained by combining the compounds 1 to 11 of Table 2 with the compounds of Table 3.

Very particularly preferred mixtures of the host materials of the formula (1) with the host materials of the formula (2) for the novel compounds

Composition is obtained by combination of compounds 1 to 11 of Table 2 with compounds 12 to 34 of Table 4, as shown in Table 5 below. Table 5:

The concentration of the electron-transporting host of formula (1) as previously described or preferably described in U.S.P.

Composition of the invention ranges from 5% to 90%, preferably from 10% to 85%, more preferably from 20% to 85%, by weight. more preferably in the range of from 30% to 80%, more preferably in the range of from 20% to 60%, and most preferably in the range of from 30% to 50% Wt .-%, based on the total

Composition.

The concentration of the hole-transporting host of formula (2) as previously described or described as being preferred in U.S. Pat

Composition is in the range of 10 wt .-% to 95 wt .-%, preferably in the range of 15 wt .-% to 90 wt .-%, more preferably in Range of from 15% to 80%, more preferably in the range of from 20% to 70%, most preferably in the range of from 40% to 80%, by weight most preferably in the range of 50% to 70% by weight, based on the total composition.

In a further preferred embodiment, the composition according to the invention may, in addition to at least one compound of the formula (1), as described above or described as preferred, be an electron-transporting host or electron-transporting host

Matrix material, and at least one compound of formula (2), as described above or described as preferred, as a hole-transporting floss or hole-transporting matrix material, more

Compounds, in particular organic functional materials containing. The composition in this embodiment preferably forms an organic layer in an electronic device, as described below.

The present invention therefore also relates to a composition which, in addition to the abovementioned materials, contains at least one further compound which is selected from the group consisting of hole injection materials, hole transport materials, hole blocking materials, wide band gap materials, fluorescent emitters, phosphorescent materials Emitters, host materials,

Electron blocking materials, electron transport materials and

Electron injection materials, n-dopants and p-dopants. It does not give the skilled person any difficulty to select these from a variety of materials known to him.

By n-dopants are meant herein reducing agents, ie electron donors. Preferred examples of n-dopants are W (hpp) ₄ and further electron-rich metal complexes according to WO 2005/086251 A2, P = N compounds (eg WO 2012/175535 A1, WO 2012/175219 A1), Naphthylenecarbodiimides (eg WO 2012/168358 A1), fluorenes (eg

WO 2012/031735 A1), radicals and diradicals (for example EP 1837926 A1,

WO 2007/107306 A1), pyridines (e.g., EP 2452946 A1, EP 2463927 A1), N-heterocyclic compounds (e.g., WO 2009/000237 A1) and acridines, and phenazines (e.g., US 2007/145355 A1).

P-dopants are understood here to mean oxidizing agents, ie electron acceptors. Preferred examples of p-dopants are F ₄ -TCNQ, Fe-TNAP, NDP-2 (Novaled), NDP-9 (Novaled), quinones (eg EP 1538684 A1, WO 2006/081780 A1, WO 2009 / 003455 A1,

WO 2010/097433 A1), Radialenes (for example EP 1988587 A1, US 2010/102709 A1, EP 2180029 A1, WO 2011/131185 A1, WO 2011134458 A1,

US 2012/223296 A1), S-containing transition metal complexes (e.g.

WO 2007/134873 A1, WO 2008/061517 A2, WO 2008/061518 A2,

DE 102008051737 A1, WO 2009/089821 A1, US 2010/096600 A1), bisimidazoles (for example WO 2008/138580 A1), phthalocyanines (e.g.

WO 2008/058525 A2), boron tetraazapentalenes (e.g., WO 2007/115540 A1), fullerenes (e.g., DE 102010046040 A1), and main group halides (e.g., WO 2008/128519 A2).

Under wide-band-gap material herein is a material in the sense of

Revelation of US 7,294,849 understood, which is characterized by a bandgap of at least 3.5 eV, where band gap is the distance between FIOMO and LUMO energy of a material is understood.

It is preferred if the composition according to the invention comprising a bipolar host and an electron-transporting flost additionally comprises at least one light-emitting compound or an emitter, with phosphorescent emitters being particularly preferred. The term phosphorescent emitter typically includes compounds in which the light emission by a spin-forbidden

Transition from an excited state with a higher spin multiplicity, ie a spin state> 1, takes place, for example, by a transition from a triplet state or a state with an even higher one

Spin quantum number, for example, a quintet state. In this case, a transition from a triplet state is preferably understood.

Suitable phosphorescent emitters (= triplet emitters) are suitable

in particular compounds which emit light, preferably in the visible range, with suitable excitation and also contain at least one atom of atomic number greater than 20, preferably greater than 38 and less than 84, particularly preferably greater than 56 and less than 80, in particular a metal with this atomic number. Preferred phosphorescence emitters are compounds which contain copper, molybdenum, tungsten, rhenium,

Ruthenium, osmium, rhodium, iridium, palladium, platinum, silver, gold or europium, especially compounds containing iridium or platinum. For the purposes of the present invention, all luminescent compounds which contain the abovementioned metals are regarded as phosphorescent emitters.

In general, all phosphorescent complexes which are used according to the prior art for phosphorescent OLEDs and as are known to the person skilled in the art of organic electroluminescent devices are suitable.

Examples of the emitters described above can be found in the applications WO 2016/015815, WO 00/70655, WO 2001/41512, WO 2002/02714,

WO2002 / 15645, EP1191613, EP1191612, EP1191614, WO05 / 033244, WO05 / 019373, US2005 / 0258742, WO2009 / 146770, WO2010 / 015307, WO2010 / 031485, WO2010 / 054731, WO 2010/054728, WO 2010/086089, WO 2010/099852, WO 2010/102709, WO 2011/032626, WO 2011/066898, WO 2011/157339, WO 2012/007086, WO 2014/008982, WO 2014/023377, WO 2014/094961, WO 2014/094960, WO 2015/036074, WO 2015/104045, WO 2015/117718, WO 2016/015815, WO 2016/124304, WO 2017/032439, WO 2015/036074, WO 2015/117718 and WO 2016/015815 are taken.

Preferred examples of phosphorescent emitters are listed in Table 6 below.

Table 6:

30

Preferred examples of phosphorescent polypodal emitters are listed in Table 7 below.

Table 7:

In the composition according to the invention is preferably each

Mixture M1, M2, M3, M4, M5, M6, M7, M8, M9, M10, M11, M12, M13, M14, M15, M16, M17, M18, M19, M20, M21, M22, M23, M24, M25 , M26,

M27, M28, M29, M30, M31, M32, M33, M34, M35, M36, M37, M38, M39,

M40, M41, M42, M43, M44, M45, M46, M47, M48, M49, M50, M51, M52,

M53, M54, M55, M56, M57, M58, M59, M60, M61, M62, M63, M64, M65,

M66, M67, M68, M69, M70, M71, M72, M73, M74, M75, M76, M77, M78,

M79, M80, M81, M82, M83, M84, M85, M86, M87, M88, M89, M90, M91,

M92, M93, M94, M95, M96, M97, M98, M99, M100,

M101, M102, M103, M104, M105, M106, M107, M108, M109, M110, M111,

M112, M113, M114, M115, M116, M117, M118, M119, M120, M121, M122,

M123, M124, M125, M126, M127, M128, M129, M130, M131, M132, M133,

M134, M135, M136, M137, M138, M139, M140, M141, M142, M143, M144,

M145, M146, M147, M148, M149, M150, M151, M152, M153, M154, M155,

M156, M157, M158, M159, M160, M161, M162, M163, M164, M165, M166,

M167, M168, M169, M170, M171, M172, M173, M174, M175, M176, M177,

M178, M179, M180, M181, M182, M183, M184, M185, M186, M187, M188,

M189, M190, M191, M192, M193, M194, M195, M196, M197, M198, M199,

M200,

M201, M202, M203, M204, M205, M206, M207, M208, M209, M210, M211,

M212, M213, M214, M215, M216, M217, M218, M219, M220, M221, M222,

M223, M224, M225, M226, M227, M228, M229, M230, M231, M232, M233,

M234, M235, M236, M237, M238, M239, M240, M241, M242, M243, M244,

M245, M246, M247, M248, M249, M250, M251, M252 or M253 combined with a compound from Table 6 or 7.

The composition according to the invention comprising at least one phosphorescent emitter preferably forms an infra-red emitting yellow, orange, red, green, blue or ultraviolet emitting layer, more preferably a yellow or green emitting layer, and most preferably a green emitting layer. In this case, a yellow-emitting layer is understood as meaning a layer whose photoluminescence maximum lies in the range from 540 to 570 nm. An orange-emitting layer is understood as meaning a layer whose photoluminescence maximum lies in the range from 570 to 600 nm.

A red-emitting layer is understood as meaning a layer whose photoluminescence maximum lies in the range from 600 to 750 nm. A green-emitting layer is understood as meaning a layer whose photoluminescence maximum lies in the range from 490 to 540 nm. A blue-emitting layer is understood as meaning a layer whose maximum photoluminescence lies in the range from 440 to 490 nm. The photoluminescence maximum of the layer is determined by measuring the photoluminescence spectrum of the layer with a layer thickness of 50 nm at room temperature, wherein the layer has the composition according to the invention, ie contains emitter and matrix.

15 The recording of the photoluminescence spectrum of the layer takes place

for example, with a commercially available photoluminescence spectrometer.

The photoluminescence spectrum of the selected emitter is usually measured in oxygen-free solution, 10-5 molar, the measurement being carried out at room temperature and any solvent is suitable, in which the selected emitter dissolves in said concentration. Particularly suitable solvents are usually toluene or 2-methyl-THF, but also

Dichloromethane. Measured with a commercial

Photolumineszenzspektrometer. The triplet energy T1 in eV is determined from the 25 photoluminescence spectra of the emitter. It will be the first

Peak maximum Plmax. (in nm) of the photoluminescence spectrum. The peak maximum Plmax. (in nm) is then converted into eV according to: E (T1 in eV) = 1240 / E (T1 in nm) = 1240 / PLmax. (in nm).

Q f)

Accordingly, preferred phosphorescent emitters are infra-red emitters, preferably from Table 5 or 6, whose triplet energy Ti is preferably from ~ 1.9 eV to ~ 1.0 eV. Accordingly, preferred phosphorescent emitters are red emitters, preferably from Table 5 or 6, whose triplet energy Ti is preferably from ~ 2.1 eV to ~ 1.9 eV.

Accordingly, preferred phosphorescent emitters are yellow emitters, preferably from Table 5 or 6, whose triplet energy Ti is preferably from ~ 2.3 eV to ~ 2.1 eV.

Accordingly, preferred phosphorescent emitters are green emitters, preferably from Table 5 or 6, whose triplet energy Ti is preferably from ~ 2.5 eV to ~ 2.3 eV.

Accordingly, preferred phosphorescent emitters are blue emitters, preferably from Table 5 or 6, whose triplet energy Ti is preferably ~ 3.1 eV to ~ 2.5 eV.

Accordingly, preferred phosphorescent emitters are ultraviolet emitters, preferably from Table 5 or 6, whose triplet energy Ti is preferably ~ 4.0 eV to ~3.1 eV.

Accordingly, particularly preferred phosphorescent emitters are green or yellow emitters, preferably from Table 6 or 7, as described above.

Very particularly preferred phosphorescent emitters are accordingly green emitters, preferably from Table 6 or 7, whose triplet energy Ti is preferably from ~ 2.5 eV to ~ 2.3 eV.

Very particular preference is given to green emitters, preferably from Table 6 or 7, as described above, for the invention

Composition or inventive emitting layer selected. Preferred fluorescent emitters are selected from the class of arylamines. An arylamine or an aromatic amine in the context of this invention is understood as meaning a compound which contains three substituted or unsubstituted aromatic or heteroaromatic ring systems bonded directly to the nitrogen. At least one of these aromatic or heteroaromatic ring systems is preferably a condensed ring system, particularly preferably having at least 14 aromatic ring atoms. Preferred examples of these are aromatic anthracene amines, aromatic anthracenediamines, aromatic pyrenamines, aromatic pyrene diamines, aromatic chrysenamines or aromatic

Chrysenediamines. By an aromatic anthracene amine is meant a compound in which a diarylamino group is bonded directly to an anthracene group, preferably in the 9-position. An aromatic anthracenediamine is understood to mean a compound in which two diarylamino groups are bonded directly to an anthracene group, preferably in the 9,10-position. Aromatic pyrenamines, pyrenediamines, chrysenamines and chrysenediamines are defined analogously thereto, the diarylamino groups being attached to the pyrene preferably in the 1-position or in the 1,6-position. Further preferred fluorescent emitters are indeno-fluorenamines or -diamines, for example according to WO 2006/108497 or WO 2006/122630, benzoindenofluoreneamines or -diamines, for example according to WO 2008/006449, and dibenzoindenofluoreneamines or -diamines, for example according to WO 2007 / 140847, as well as the indenofluorene derivatives with condensed aryl groups disclosed in WO 2010/012328.

In a further preferred embodiment of the invention, the composition according to the invention is used as a component of mixed-matrix systems. The mixed-matrix systems preferably comprise three or four different matrix materials, more preferably three different matrix materials (that is, a further matrix component in addition to the invention

Composition). Particularly suitable matrix materials, which in Combination with the composition according to the invention as

Matrix components of a mixed-matrix system can be used are selected from wide-band-gap materials,

Electron Transport Materials (ETM) and Hole Transport Materials (HTM).

Preference is given to using mixed-matrix systems in phosphorescent organic electroluminescent devices. More detailed information on mixed-matrix systems is contained inter alia in the application WO 2010/108579. Particularly suitable matrix materials which can be used in combination with the composition according to the invention as matrix components of a mixed-matrix system in phosphorescent or fluorescent organic electroluminescent devices are selected from the below-mentioned preferred matrix materials for phosphorescent emitters or the preferred matrix materials for fluorescent emitters, as the case may be which type of emitter is used. Preferably, the mixed-matrix system is optimized for an emitter of Table 6 or 7.

As further host materials, preferably for fluorescent emitters, in addition to the composition according to the invention, as described above, comprising particularly preferably a mixture of materials selected from M1 to M253, different classes of substances in question. Preferred further host materials are selected from the classes of the oligoarylenes (for example 2,2 ', 7,7'-tetraphenylspirobifluorene according to EP 676461 or US Pat

Dinaphthylanthracene), in particular containing the oligoarylenes

condensed aromatic groups, the oligoarylenevinylenes (eg DPVBi or spiro-DPVBi according to EP 676461), the polypodal metal complexes (eg according to WO 2004/081017), the hole-conducting compounds (eg according to WO 2004/058911 ), the electron-conducting compounds, in particular ketones, phosphine oxides, sulfoxides, etc. (for example according to US Pat

WO 2005/084081 and WO 2005/084082), the atropisomers (for example according to WO 2006/048268), the boronic acid derivatives (for example according to US Pat WO 2006/117052) or the benzanthracenes (for example according to US Pat

WO 2008/145239). Particularly preferred host materials are selected from the classes of oligoarylenes containing naphthalene, anthracene, Benzanthracen and / or pyrene or atropisomers of these compounds, the oligoarylenevinylenes, the ketones, the phosphine oxides and the sulfoxides. Very particularly preferred matrix materials are selected from the classes of oligoarylenes containing anthracene, benzanthracene,

Benzphenanthren and / or pyrene or atropisomers of these compounds. In the context of this invention, an oligoarylene is to be understood as meaning a compound in which at least three aryl or arylene groups are bonded to one another.

As further matrix materials, preferably for phosphorescent emitters, in addition to the composition according to the invention, as described above, comprising a mixture are particularly preferred

Materials selected from M1 to M253, different substance classes in question. Preferred further matrix materials are selected from the classes of the aromatic amines, in particular triarylamines, z. In accordance with US 2005/0069729, carbazole derivatives (for example CBP, N, N-biscarbazolylbiphenyl) or compounds according to WO 2005/039246,

US 2005/0069729, JP 2004/288381, EP 1205527 or WO 2008/086851, bridged carbazole derivatives, for. B. according to WO 2011/088877 and

WO 2011/128017, indenocarbazole derivatives, e.g. B. according to WO 2010/136109 and WO 2011/000455, Azacarbazolderivate, z. B. according to EP 1617710, EP 1617711, EP 1731584, JP 2005/347160, Indolocarbazolderivate, z. B. according to WO 2007/063754 or WO 2008/056746, ketones, z. B. according to WO 2004/093207 or WO 2010/006680, phosphine oxides, sulfoxides and

Sulfones, e.g. B. according to WO 2005/003253, oligophenylenes, bipolar

Matrix materials, e.g. B. according to WO 2007/137725, silanes, z. B. according to WO 2005/111172, azaborole or boronic esters, z. B. according to WO 2006/117052,

Triazine derivatives, e.g. B. according to WO 2010/015306, WO 2007/063754 or WO 2008/056746, zinc complexes, for. B. according to EP 652273 or WO 2009/062578, aluminum complexes, e.g. B. BAIq, Diazasilol- and

Tetraazasilol derivatives, eg. B. according to WO 2010/054729, diazaphosphole derivatives, z. B. according to WO 2010/054730 and aluminum complexes, for. B. BAIQ.

According to an alternative embodiment of the present invention, the composition contains besides the ingredients

electron-transporting host and hole-transporting host no other ingredients, that is, functional materials. It is in this embodiment, material mixtures, which are used as such for the production of the organic layer. These systems are also referred to as premix systems, which is used as the only source of material in the vapor deposition. As a result, the vapor deposition of a layer with a uniform distribution of the components can be achieved in a simple and rapid manner, without a precise

Control of a variety of material sources is necessary.

Another object of the invention is therefore a

A composition consisting of a compound of the formula (1), (1a) to (1 k) or a compound selected from 1 to 11 and a

A compound of the formula (2), (2a) to (2i) or a compound selected from 12 to 34.

The composition according to the invention, as described or preferred described above, is suitable for use in one

organic electronic device. It is under a

organic electronic device understood a device which contains at least one layer containing at least one organic compound. The device can also be inorganic

Contain materials or layers which are composed entirely of inorganic materials. Another object of the invention is therefore the use of a composition as described or preferred

described, in particular a mixture selected from M1 to M253, in an organic electronic device.

The components or components of the compositions can be processed by vapor deposition or from solution. If the compositions are applied from solution

Formulations of the composition according to the invention containing at least one further solvent required. These formulations may be, for example, solutions, dispersions or emulsions. It may be preferable to use mixtures of two or more solvents for this purpose. A further subject of the present invention is therefore a formulation containing a composition according to the invention and at least one solvent.

Suitable and preferred solvents are, for example, toluene, anisole, o-, m- or p-xylene, methyl benzoate, mesitylene, tetralin, veratrol, THF, methyl-TFIF, THP, chlorobenzene, dioxane, phenoxytoluene, in particular 3-phenoxytoluene, (-) -Fenchone, 1, 2,3,5-tetramethylbenzene, 1, 2,4,5-tetramethylbenzene, 1-methylnaphthalene, 2-methylbenzothiazole, 2-phenoxyethanol, 2-pyrrolidinone, 3-methylanisole, 4-methylanisole, 3,4 Dimethylanisole, 3,5-dimethylanisole, acetophenone, a-terpineol,

Benzothiazole, butyl benzoate, cumene, cyclohexanol, cyclohexanone,

Cyclohexylbenzene, decalin, dodecylbenzene, ethyl benzoate, indane,

Methyl benzoate, NMP, p-cymene, phenol, 1,4-diisopropylbenzene, dibenzyl ether, diethylene glycol butyl methyl ether, triethylene glycol butyl methyl ether, diethylene glycol dibutyl ether, triethylene glycol dimethyl ether, diethylene glycol monobutyl ether, tripropylene glycol dimethyl ether, tetraethylene glycol di- methyl ether, 2-isopropylnaphthalene, pentylbenzene, hexylbenzene, heptylbenzene, octylbenzene, 1, 1-bis (3,4-dimethylphenyl) ethane, hexamethylindane or mixtures of these solvents. The formulation may also contain at least one further organic or inorganic compound which is also disclosed in the

electronic device is used, in particular an emitting compound, in particular a phosphorescent emitter and / or another matrix material. Suitable emissive compounds and other matrix materials have already been listed above.

The present invention also relates to the use of the composition according to the invention in an organic

electronic device, preferably in an electron-transporting and / or in an emitting layer.

The organic electronic device is preferably selected from organic integrated circuits (OlCs), organic field effect transistors (OFETs), organic thin film transistors (OTFTs), organic electroluminescent devices, organic solar cells

(OSCs), organic optical detectors and organic photoreceptors, with the organic electroluminescent devices being particularly preferred. Very particularly preferred organic electroluminescent devices for the use of the composition according to the invention are organic light-emitting transistors (OLETs), organic field quench devices (OFQDs), organic light-emitting electrochemical cells (OLECs, LECs, LEECs), organic laser diodes (O-lasers) and organic light-emitting diodes (OLEDs), particularly preferred are OLECs and OLEDs and most preferred are OLEDs. Preferably, the composition according to the invention, as described above or described as preferred, is used in an electronic device in a layer with electron-transporting function. The layer is preferably an electron-injection layer (EIL), an electron-transport layer (ETL), a hole-blocking layer (HBL) and / or an emission layer (EML), particularly preferably an ETL, EIL and / or an EML. Most preferably, the composition according to the invention is used in an EML,

in particular as a matrix material.

A further subject of the present invention is therefore an organic electronic device which is selected in particular from one of the abovementioned electronic devices and which contains the inventive composition as described above or preferably described, preferably in an emission layer (EML), in one Electron transport layer (ETL), in one

Electron injection layer (EIL) and / or in a hole blocking layer (HBL), more preferably in an EML, EIL and / or ETL and whole

especially preferred in an EML.

If it is an emitting layer, then it is

particularly preferred is a phosphorescent layer which is characterized in that it has, in addition to the composition as described above or preferably described

contains phosphorescent emitter, in particular together with an emitter of Table 6 or 7 or a preferred emitter, as described above.

In a particularly preferred embodiment of the present invention

The invention therefore relates to an electronic electroluminescent device in the electronic device, most preferably to an organic light-emitting diode (OLED), the inventive A composition as previously described or preferably described together with a phosphorescent emitter in the

Emissions layer (EML) contains. The composition according to the invention according to the preferred embodiments and the emissive compound contains

preferably between 99.9 and 1% by volume, more preferably between 99 and 10% by volume, particularly preferably between 98 and 60% by volume, very particularly preferably between 97 and 80% by volume of matrix material of at least one Compound of formula (1) and at least one

Compound of formula (2) according to the preferred embodiments, based on the total composition of emitter and matrix material. Accordingly, the composition preferably contains between 0.1 and 99% by volume, more preferably between 1 and 90% by volume, particularly preferably between 2 and 40% by volume, very particularly preferably between 3 and 20% by volume of Emitters based on the total composition of emitter and matrix material. Will the

Connections processed from solution, so instead of the above

given amounts in Vol .-% preferably the corresponding amounts used in wt .-%.

In addition to the cathode, anode and the layer containing the composition according to the invention, an electronic device may contain further layers. These are, for example, selected from in each case one or more hole injection layers, hole transport layers,

Hole blocking layers, emitting layers, electron transport layers, electron injection layers, electron blocking layers, exciton blocking layers, interlayers,

Charge Generation Layers (IDMC 2003, Taiwan, Session 21 OLED (5), T. Matsumoto, T. Nakada, J. Endo, K. Mori, N. Kawamura, A. Yokoi, J. Kido, Multiphoton Organic EL Device Having Charge Generation Layer) and / or organic or inorganic p / n Transitions. It should be noted, however, that not necessarily each of these layers must be present.

The sequence of layers in an organic electroluminescent device is preferably the following:

Anode / hole injection layer / hole transport layer / emitting layer / electron transport layer / electron injection layer / cathode.

This sequence of layers is a preferred sequence.

It should again be noted that not all of the layers mentioned must be present, and / or that additional layers may be present.

An organic electroluminescent device containing the composition of the invention may contain a plurality of emitting layers. In this case, these emission layers particularly preferably have a total of several emission maxima between 380 nm and 750 nm, so that overall white emission results, ie. H. In the emitting layers, various emitting compounds are used which can fluoresce or phosphoresce and which emit blue or yellow or orange or red light. Particular preference is given to three-layer systems, that is to say systems having three emitting layers, the three layers exhibiting blue, green and orange or red emission (for the basic structure see, for example, US Pat.

WO 2005/011013). It should be noted that for the production of white light instead of multiple colored emitting

Emitter compounds may also be a single emitter used, which emits in a wide wavelength range. Suitable charge transport materials, as used in the hole injection or hole transport layer or in the electron blocking layer or in the electrolysis layer. The transport layer of the organic electroluminescent device according to the invention can be used, for example, those disclosed in Y. Shirota et al., Chem. Rev. 2007, 107 (4), 953-1010

Compounds or other materials, as used in the prior art in these layers.

As materials for the electron transport layer, it is possible to use all materials as used in the prior art as electron transport materials in the electron transport layer. In particular, aluminum complexes, for example Alq3, are suitable.

Zirconium complexes, for example Zrq ₄ , benzimidazole derivatives, triazine derivatives, pyrimidine derivatives, pyridine derivatives, pyrazine derivatives, quinoxaline derivatives, quinoline derivatives, oxadiazole derivatives, aromatic ketones,

Lactams, boranes, diazaphosphole derivatives and phosphine oxide derivatives.

Further suitable materials are derivatives of the above

Compounds as described in JP 2000/053957, WO 2003/060956,

WO 2004/028217, WO 2004/080975 and WO 2010/072300 are disclosed. Particularly preferred as hole transport materials are materials which can be used in a hole transport, hole injection or electron blocking layer, such as indenofluorenamine derivatives (for example according to WO 06/122630 or WO 06/100896), the amine derivatives disclosed in EP 1661888 , Hexaazatriphenylene derivatives (for example according to WO 01/049806), fused aromatic amine derivatives (for example according to US Pat. No. 5,061,569), the amine derivatives disclosed in WO 95/09147, monobenzoindenofluorenamines (for example according to WO 08/006449 ), Dibenzoindenofluoreneamines (eg according to WO 07/140847), spirobifluorene amines (eg according to WO 2012/034627 or the not yet disclosed EP 12000929.5), fluorene amines (eg according to WO 2014/015937 WO 2014/015938 and WO 2014/015935), Spiro

Dibenzopyran amines (eg according to WO 2013/083216) and dihydroacridine derivatives (eg WO 2012/150001). As the cathode of electronic devices, metals are lower

Work function, metal alloys or multilayer structures

various metals, such as alkaline earth metals, alkali metals, main group metals or lanthanides (eg, Ca, Ba, Mg, Al, In, Mg, Yb, Sm, etc.). Furthermore, alloys of an alkali or alkaline earth metal and silver, for example an alloy of

Magnesium and silver. In multilayer structures, it is also possible, in addition to the metals mentioned, to use further metals which have a relatively high work function, such as, for example, As Ag or Al, which then usually combinations of metals, such as Ca / Ag, Mg / Ag or Ba / Ag are used. It may also be preferred to introduce between a metallic cathode and the organic semiconductor a thin intermediate layer of a material with a high dielectric constant. For this example, come alkali metal or

Alkaline earth metal fluorides, but also the corresponding oxides or

Carbonates in question (eg LiF, L12O, BaF2, MgO, NaF, CsF, CS2CO3, etc.). Furthermore, lithium quinolinate (LiQ) can be used for this purpose. The

Layer thickness of this layer is preferably between 0.5 and 5 nm.

As the anode, high workfunction materials are preferred. Preferably, the anode has a work function greater than 4.5 eV. Vacuum up. On the one hand metals with a high redox potential are suitable for this purpose, such as, for example, Ag, Pt or Au. On the other hand, metal / metal oxide electrodes (eg Al / Ni / NiO _x , Al / PtO _x ) may also be preferred. For some applications, at least one of the electrodes must be transparent or

be partially transparent to either the irradiation of the organic

Material (organic solar cell) or the extraction of light (OLED, O-LASER) to allow. Preferred anode materials here are conductive mixed metal oxides. Particular preference is given to indium-tin

Oxide (ITO) or indium-zinc oxide (IZO). Preference is furthermore given to conductive, doped organic materials, in particular conductive doped polymers. Furthermore, the anode can also consist of several layers, for example of an inner layer of ITO and an outer layer of a metal oxide, preferably tungsten oxide, molybdenum oxide or vanadium oxide.

The organic electronic device is used in the manufacture

structured accordingly (depending on the application), contacted and finally sealed because the life of the devices according to the invention in the presence of water and / or air shortened.

In a further preferred embodiment, the organic electronic device containing the composition according to the invention is characterized in that one or more organic layers containing the composition according to the invention are coated with a sublimation method. The materials are vacuum deposited in vacuum sublimation at an initial pressure of less than 10 ⁵ mbar, preferably less than 10 ⁶ mbar. However, it is also possible that the initial pressure is even lower, for example less than 10 ⁷ mbar.

Also preferred is an organic electroluminescent device, characterized in that one or more layers are coated with the OVPD (Organic Vapor Phase Deposition) method or with the aid of a carrier gas sublimation. The materials are applied at a pressure between 10 ⁵ mbar and 1 bar. A special case of this process is the OVJP (Organic Vapor Jet Printing) process, in which the materials are applied directly through a nozzle and thus structured (for example, BMS Arnold et al., Appl. Phys. Lett., 2008, 92, 053301).

Further preferred is an organic electroluminescent device, characterized in that one or more organic layers containing the inventive composition of solution, such. B. by spin coating, or by any printing method, such as. As screen printing, flexographic printing, Nozzle Printing or offset printing, but particularly preferably LITI (Light Induced Thermal Imaging, thermal transfer printing) or ink-jet printing (ink jet printing), are produced. For this purpose, soluble compounds of the components of the invention

Composition needed. High solubility can be achieved by suitable substitution of the corresponding compounds. Processing from solution has the advantage that the layer containing the

Composition of the invention can be applied very easily and inexpensively. This technique is particularly suitable for the mass production of organic electronic devices.

Furthermore, hybrid processes are possible in which, for example, one or more layers are applied from solution and one or more further layers are vapor-deposited.

These methods are generally known to those skilled in the art and can be applied to organic electroluminescent devices. Another object of the invention is therefore a method for

Production of an organic electronic device containing a composition according to the invention as described above or preferably described, characterized in that at least one organic layer containing a composition according to the invention by vapor deposition, in particular with a

Sublimation method and / or with an OVPD (Organic Vapor Phase Deposition) method and / or by means of a carrier gas sublimation, or from solution, in particular by spin coating or with a

Printing process is applied.

In the production of an organic electronic device by means of vapor deposition, there are basically two possibilities, such as an organic layer which is intended to contain the composition according to the invention and which may comprise a plurality of different constituents, can be applied to any desired substrate or vapor-deposited. For one, the materials used in each case in one

Material source submitted and finally from the various

Material sources are evaporated ("co-evaporation"). On the other hand, the various materials can be premixed and the mixture presented in a single source of material, from which it is finally evaporated (premix-evaporation). As a result, the vapor deposition of a layer with a uniform distribution of the components can be achieved in a simple and rapid manner, without a precise

Control of a variety of Materialqellen is necessary.

Another object of the invention is therefore a process, characterized in that the at least one compound of formula (1), as described above or described as preferred, and the at least one compound of formula (2), as described above or described as preferred , successively or simultaneously from at least two sources of material, optionally with further materials, as described above or preferably described, are deposited from the gas phase and form the organic layer.

In a preferred embodiment of the present invention, the at least one organic layer is applied by means of vapor deposition, wherein the constituents of the composition are premixed and evaporated from a single source of material.

Another object of the invention is therefore a method, characterized in that the composition of the invention, as described above or preferably described, is used as a material source for vapor deposition of the flea system, and

optionally with other materials forming organic layer. Another object of the invention is a method for producing an organic electronic device containing a

Composition according to the invention as previously described or preferably described, characterized in that the

inventive formulation, as previously described, is used to apply the organic layer.

The compositions according to the invention or the

Devices according to the invention are characterized by the following surprising advantages over the prior art:

The use of the compositions according to the invention in organic electronic devices, in particular in organic electroluminescent devices, and in particular in an OLED or OLEC, leads to significant increases in the lifetime of the devices.

The use of the compositions according to the invention in organic electronic devices, in particular in an organic electroluminescent device, and in particular in an OLED or OLEC, likewise leads to a significant increase in the efficiency and / or operating voltage of the devices. As can be seen in Example 1 below, good voltages and efficiencies can be achieved by using compounds according to the prior art, for example compound SoA1, with mean emitter concentrations in the EML of 12%. The life of the components is low.

An improvement in life by 10 to 40%, for example, representative of the examples of Table 10 from 12 to 37%, at comparable operating voltage and comparable or improved current efficiency can be achieved by the inventive combination of

Compounds of formula (1) as described above can be obtained with compounds of formula (2) as described above.

This improvement in lifetime at comparable operating voltage and comparable or improved current efficiency may be favored by the inventive combination of compounds of formula (1) as described above with compounds of formula (2) as before

be achieved at emitter concentrations of 2 to 15 wt .-% in the emission layer.

The difference from the comparative example lies in the electronic structure of the electron-transporting host of compounds 1 and 6 for comparative compound SoA1, as shown in Table 9.

For the expert unpredictable, causes the exchange of

Carbazole to a spirobifluorenyl linked directly or via a linker to the dibenzofuran / dibenzothiophene, an improvement in the lifetime of electronic devices, especially OLEDs, of about 10 to 40%.

Unpredictable to one skilled in the art, the linkage in positions 1 and 8 of dibenzofuran or dibenzothiophene will result in comparison to linkage in positions 4 and 6 of dibenzofuran or

Dibenzothiophene an improvement in the life of electronic devices.

The compositions according to the invention are very suitable for use in an emission layer and show improved performance data, in particular for the service life, operating voltage and / or

Current efficiency, compared to prior art compounds, as previously described. The compositions according to the invention can be easily processed and are therefore very well suited for mass production in commercial applications.

The compositions according to the invention can be premixed and vapor-deposited from a single source of material so that an organic layer with uniform distribution of the components used can be prepared in a simple and rapid manner.

These advantages mentioned above are not accompanied by a deterioration of the further electronic properties of an electronic device.

It should be understood that variations of the embodiments described in the present invention are within the scope of this invention. Each feature disclosed in the present invention may be provided with alternative features, the same, an equivalent or the like, unless explicitly excluded

Serve purpose, be exchanged. Thus, unless otherwise stated, each feature disclosed in the present invention is to be considered as an example of a generic series or as an equivalent or similar feature.

All features of the present invention may be combined in any manner, unless certain features and / or steps are mutually exclusive. This is especially true for preferred features of the present invention. Likewise, features of non-essential combinations can be used separately (and not in combination). The teaching on technical action disclosed with the present invention can be abstracted and combined with other examples. The invention is explained in more detail by the following examples without wishing to restrict them thereby.

General methods:

Determination of orbital energies and electronic states

The HOMO and LUMO energies as well as the triplet level and the

Singlet levels of materials are quantum chemical

Bills determined. For this purpose, the program package "Gaussian09, Revision D.01" (Gaussian Inc.) is used in the present case. For the calculation of organic substances without metals (with the method "org.") Is first a geometry optimization with the semi-empirical method AM1 (Gaussian input line "# AM1 opt") with the charge (charge) 0 and the

Multiplicity (multiplicity) 1 performed. This is followed by an energy calculation (single point) for the electronic ground state and the triplet level based on the optimized geometry. Here is the time dependent density functional theory (TDDFT) method B3PW91 with the base set 6-31 G (d) (Gaussian input line "# B3PW91 / 6-31 G (d) td = (50-50, nstates = 4) ") (Charge 0, multiplicity 1). For

organometallic compounds (termed "M-org.") the geometry is optimized using the Hartree-Fock method and the LanL2MB basic set (Gaussian input line "# HF / LanL2MB opt") (charge 0,

Multiplicity 1). The energy bill is, as described above, analogous to that of the organic substances, with the difference that for the metal atom, the base set "LanL2DZ" and for the ligands of the basic set "6-31 G (d)" is used (Gaussian input line " # B3PW91 / gen

pseudo = lanl2 td = (50-50, nstates = 4) "). From the energy calculation we obtain the HOMO as the last orbital occupied by two electrons (Alpha occ. Eigenvalues) and LUMO as the first unoccupied orbital (Alpha virt.

eigenvalues) in Hartree units, where HEh and LEh are for the HOMO Energy in Hartree units or for the LUMO energy in Hartree units. This is the basis of

Cyclic voltammetry calibrated HOMO and LUMO value in electron volts determined as follows:

HOMO (eV) = (HEh ^* 27.212) ^* 0.8308-1.118;

LUMO (eV) = (LEh ^* 27.212) ^* 1.0658-0.5049.

The triplet level T1 of a material is defined as the relative

Excitation energy (in eV) of the triplet state with the lowest energy, which results from the quantum chemical energy calculation.

The singlet level S1 of a material is defined as the relative

Excitation energy (in eV) of the singlet state with the second lowest energy, which results from the quantum chemical energy calculation. The energetically lowest singlet state is called SO.

The method described here is independent of the software package used and always gives the same results. Examples of frequently used programs for this purpose are "Gaussian09" (Gaussian Inc.) and Q-Chem 4.1 (Q-Chem, Inc.). In the present case, the program package "Gaussian09, Revision D.01" is used to calculate the energies.

Example 1: Production of the OLEDs

In the following Examples V1 to E10 (see Table 8), the use of the material combinations according to the invention in OLEDs is presented.

Pretreatment for Examples V1 to E10: Glass slides coated with structured ITO (indium tin oxide) 50 nm thick are first treated with an oxygen plasma followed by an argon plasma prior to coating. These plasma-treated glass slides form the substrates to which the OLEDs are applied. In principle, the OLEDs have the following layer structure: substrate / hole injection layer (HIL) / hole transport layer (HTL) / electron blocking layer (EBL) / emission layer (EML) / optional hole blocking layer (HBL) / electron transport layer (ETL) / optional electron injection layer (EIL) and finally a cathode. The cathode is formed by a 100 nm thick aluminum layer. The exact structure of the OLEDs can be found in Table 8. The materials needed to make the OLEDs are shown in Table 9. The data of the OLEDs are listed in Table 10. Examples V1-V8 are comparative examples according to the prior art, examples E1 to E10 show data of OLEDs according to the invention.

All materials are thermally evaporated in a vacuum chamber. In this case, the emission layer always consists of at least one matrix material (host material, host material), in the sense of the invention at least two matrix materials, and an emitting dopant (dopant, emitter), which penetrates the matrix material or the matrix materials

Cover vaporization is mixed in a certain volume fraction. An indication such as SoA1: CoH1: TEG1 (45%: 45%: 10%) here means that the material SoA1 in a volume fraction of 45%, CoH1 in a proportion of 45% and TEG1 in a proportion of 10% in the layer is present. Similarly, the electron transport layer may consist of a mixture of two materials. The OLEDs are characterized by default. For this purpose, the

Electroluminescence spectra and the current efficiency (SE, measured in cd / A) as a function of the luminance, calculated from current-voltage-luminance characteristics assuming a lambertian

Radiation characteristic, as well as the life determined. The

Electroluminescence spectra are determined at a current density of 10mA / cm ² and used to calculate the CIE 1931 x and y color coordinates. The Specification U 10 in Table 10 indicates the voltage required for a current density of 10mA / cm ² . SE10 denotes the current efficiency achieved at a current density of 10mA / cm ² .

The lifetime LD is defined as the time after which the luminance drops from the start luminance to a certain proportion L1 when operating at a constant current density jo. An indication L1 = 80% in Table 10 means that the lifetime given in column LD corresponds to the time after which the luminance drops to 80% of its initial value. Use of mixtures according to the invention in OLEDs

The material combinations according to the invention can be found in the

Emission layer can be used in phosphorescent green OLEDs. The combinations according to the invention of compounds 1 and 6 with compound 15, 19, 23, 26 or 27 are used in examples E1 to E10 as matrix material in the emission layer.

Table 8: Structure of the OLEDs

Table 9: Structural formulas of materials for OLEDs

Table 10: OLEDs data

Example 2: Synthesis of compounds of the invention a) 2- {12-chloro-8-oxatricyclo [7.4.0.0 ^{2 7} ] trideca-1 (13), 2 (7), 3,5,9,11-hexaen-3-yl} - 4- {8 -oxatricyclo [7.4.0.0 ^{2 7} ] trideca-1 (9), 2,4,6,10,12-hexaen-3-yl} -6-phenyl-1,3,5-triazine

58 g (210 mmol, 1.00 eq.) Of 1-boronyl-8-chloro-dibenzofuran [CAS 162667-19-4], 90.2 g (252 mmol, 1.20 eq.) Of 2-chloro-4- {8-oxatricyclo [7.4.0.0 ² ' ⁷ ] trideca- 1 (9), 2 (7), 3,5,10,12-hexaen-3-yl} -6-phenyl-1,3,5-triazine [CAS 1883265-32-4] and 44.5 g (420 mmol, 2.00 eq.) Of sodium carbonate [CAS 497-19-8] are dissolved in a mixture of 1000 ml of dioxane [CAS 123-91-1], 1000 ml of toluene [CAS 108-88-3] and 400 ml of water. To this suspension is added 4.85 g (4.20 mmol, 0.02 eq.) Of tetrakis (triphenylphosphine) palladium (0) [CAS 14221-01-3] and the reaction mixture is heated at reflux for 16 h. After cooling, the organic phase is separated, filtered through silica gel, washed three times with 200 ml_ of water and then concentrated to dryness. The yield is 79.1 g (151 mmol, 72% of theory).

Analogously, the following compounds can be obtained:

[CAS 1822310-63-3] [CAS 1365812-76-5]

100 g (209 mmol, 1.00 eq.) Of 2- {12-bromo-8-oxatricyclo [7.4.0.0 ² ' ⁷ ] trideca-

20

1 (9), 2 (7), 3, 5, 10, 12-hexaen-3-yl} -4,6-diphenyl-1,3,5-triazine [CAS 1 160861-53-9],

114 g (220 mmol, 1.05 eq.) Of (3- {9,9'-spirobi [fluoren] -2-yl} phenyl) boronic acid [CAS

1365812-76-5] and 133 g (627 mmol, 3.00 eq.) Of tripotassium phosphate [CAS 14593-

46-5] in a mixture of 800 mL dioxane [CAS 123-91-1], 800 mL toluene [CAS

108-88-3] and 800 mL of water. To this suspension are 3.86 g

25 (4.80 mmol, 4.5 mol%) of dicyclohexyl- (2 ', 6'-dimethoxybiphenyl-2-yl) phosphanes

(SPhos) [CAS 657408-07-6] and 2.87 g (3.14 mmol, 1.5 mol%)

Tris (dibenzylideneacetone) dipalladium [CAS 51364-51-3] was added and the

Reaction mixture is heated under reflux for 16 h. The reaction mixture is cooled to room temperature and phases are separated. After extraction of the aqueous phase, the combined organic phases with saline ou

washed and dried over sodium sulfate. After filtration through Alox, the solvent is removed. The resulting solid is extracted twice from ethyl acetate recrystallized. After final sublimation under high vacuum, the purified product is obtained as a colorless solid 96.3 g (122 mmol, 58%).

Analogously, the following compounds can be obtained:

Claims

claims

Formula (2)

where the symbols and indices used are:

Y is selected from O or S;

aromatic ring atoms which may be substituted by one or more radicals R ⁵ ;

R _A is H, -I_3-Ar ₄ or -Li-N (Ar) 2;

RB is Ar3 or -l_2-N (Ar) 2;

Li _, l_2 _, are the same or different at each occurrence

Single bond or an aromatic or heteroaromatic ring system having from 5 to 30 aromatic ring atoms which may be substituted by one or more R ³ radicals; L3 is a single bond or an aromatic or

heteroaromatic ring system with 5 to 30 aromatic

Substituents R ³ can form a ring;

Ar3 is an aromatic ring system with 6 to 40 aromatic

Ar ₄ is the same or different at each occurrence and is an unsubstituted or substituted 9-aryl-carbazolyl or unsubstituted or substituted carbazol-9-yl having one or more radicals

R ⁴ can be substituted and wherein independently of one another or several times each two radicals R ⁴ or a radical R ⁴ together with a radical R ^{1 can form} a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring, wherein aryl is an aromatic or heteroaromatic

Ring system having 5 to 30 aromatic ring atoms, which may be substituted by R ³ ;

R °, R, R ¹ are identically or differently selected on each occurrence from the group consisting of H, D, F, Cl, Br, I, CN, NO 2, N (Ar) 2,

N (R ² ) ₂ , C (= O) Ar, C (= O) R ² , P (= O) (Ar) ₂ , P (Ar) ₂ , B (Ar) ₂ , Si (Ar) ₃ , Si (R ² ) 3, a straight-chain alkyl, alkoxy or thioalkyl group with 1 to 20 C atoms or a branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 20 C atoms or an alkenyl group having 2 to 20 C atoms, each of which may be substituted by one or more radicals R ² , wherein one or more non-adjacent Chh groups by R ² C = CR ² , Si (R ² ) 2,

C = O, C = S, C = NR ² , P (= O) (R ² ), SO, SO ₂ , NR ² , O, S or CONR ² may be replaced and where one or more H atoms are replaced by D , F, Cl, Br, I, CN or N0 ₂ can be replaced, an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, each of which may be substituted by one or more R ² , an aryloxy or heteroaryloxy group with 5 bis 40 aromatic ring atoms which may be substituted by one or more radicals R ² , or an aralkyl or

R ² is the same or different on each occurrence selected from the group consisting of H, D, F, Cl, Br, I, CN, NO ₂ , N (Ar) ₂ , NFI ₂ , N (R ³ ) ₂ , C (= 0 ) Ar, C (= O) H, C (= O) R ³ , P (= O) (Ar) ₂ , a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 40 C atoms or a branched or cyclic alkyl -, alkoxy or

Thioalkyl group having from 3 to 40 carbon atoms or an alkenyl or alkynyl group having from 2 to 40 carbon atoms, each of which may be substituted with one or more R ³ radicals, one or more non-adjacent CFh groups represented by FIC = CFI, R ³ C = CR ³ ,

C = Se, C = NR ³ , or CONR ³ replaced and wherein one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO 2, an aromatic or heteroaromatic ring system having from 5 to 60 aromatic

R ³ in each occurrence is identically or differently selected from the group consisting of H, D, F, CN, N (Ar) 2, an aliphatic hydrocarbon radical having 1 to 20 C atoms or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, in which one or more Fl atoms may be replaced by D, F, CI, Br, I or CN and which may be substituted by one or more alkyl groups each having 1 to 4 carbon atoms; two or more adjacent substituents R ^{3 may} together form a mono- or polycyclic, aliphatic ring system;

R ⁴ is the same or different at each occurrence selected from the group consisting of Fl, D, F, CN, an aliphatic hydrocarbon radical having 1 to 20 carbon atoms or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, in which one or more Fl atoms by D, F, CI, Br,

I, a straight-chain or branched alkyl group having 1 to 4

R ⁵ is the same or different on each occurrence selected from the group consisting of D, F, CN and an aryl group having 6 to 18 C atoms, two or more adjacent substituents R ⁵ can together form a mono- or polycyclic, ali phatic ring system;

Ar is the same or different at each occurrence an aromatic or heteroaromatic ring system with 5 to 30 aromatic

Ring atoms which may be substituted with one or more non-aromatic radicals R ³ ; in this case, two radicals Ar, which bind to the same N atom, P atom or B atom, also by a single bond or a bridge selected from N (R ³ ), C (R ³ ) ₂ , O or S, with each other be bridged and

n and m independently of each other denote 0, 1, 2 or 3,

p independently of each occurrence means 0, 1, 2, 3 or 4.

2. Composition according to claim 1, characterized in that Y in formula (1) is O.

3. Composition according to claim 1 or 2, characterized in that the compound of the formula (2) corresponds to one of the formulas (2a) to (2d),

Formula (2d)

where the symbols and indices used Li, L2, L3, Ar, Ar 3, Ar _4, R ^1, q and p have meaning as in claim 1.

4. Composition according to one or more of claims 1 to 3, characterized in that the composition contains at least one further compound which is selected from the group consisting of hole injection materials, hole transport materials, hole blocking materials, wide-band-gap materials, fluorescent emitters, phosphorescent emitters, host materials, matrix materials, electron blocking materials, electron transport materials and electron injection materials, n-dopants and p-dopants.

5. Composition according to one or more of claims 1 to 4, characterized in that the composition consists of a compound of formula (1) and a compound of formula (2).

6. Formulation containing a composition according to one or more of claims 1 to 5 and at least one solvent.

7. Use of a composition according to one or more of claims 1 to 5 in an organic electronic device.

8. Use according to claim 7, characterized in that the

organic electronic device is selected from the group of organic integrated circuits (OlCs), organic field effect transistors (OFETs), organic thin film transistors (OTFTs), organic electroluminescent devices, organic solar cells (OSCs), organic optical detectors, and organic photoreceptors.

9. Organic electronic device containing at least one

Composition according to one or more of claims 1 to 5 in at least one organic layer.

10. The device according to claim 9, characterized in that it consists of the group of organic integrated circuits (OlCs), organic field effect transistors (OFETs), organic

Thin-film transistors (OTFTs), organic

Electroluminescent devices, organic solar cells (OSCs), organic optical detectors and organic photoreceptors is selected.

11.Vorrichtung according to claim 9 or 10, characterized in that it is an electroluminescent device, which is selected from the organic light-emitting transistors (OLETs), organic field quench devices (OFQDs), organic

light-emitting electrochemical cells (OLECs, LECs, LEECs), organic laser diodes (O-lasers) and the organic

light emitting diodes (OLEDs).

12. Device according to one or more of claims 9 to 11,

characterized in that the composition according to one or more of claims 1 to 6 in an emission layer (EML), in an electron transport layer (ETL), in a

Electron injection layer (EIL) and / or in a hole blocking layer (HBL) contains.

13. Device according to one or more of claims 9 to 12,

characterized in that it contains the composition according to one or more of claims 1 to 5 in the emission layer together with a phosphorescent emitter.

14. A method for producing a device according to one or more of claims 9 to 13, characterized in that at least one organic layer containing a composition according to one or more of claims 1 to 5 is applied by vapor deposition or from solution.

15. The method according to claim 14, characterized in that the

at least one compound of the formula (1) and the at least one compound of the formula (2) as described in one of claims 1 to 4, successively or simultaneously from at least two sources of material, optionally with further materials, are deposited from the gas phase and the organic Forming a layer.

16. The method according to claim 14, characterized in that the

A composition according to claim 5 as a material source for

Gas phase separation of the host system is used and

optionally forms the organic layer with other materials.

17. The method according to claim 14, characterized in that the

Formulation according to claim 6 is used to apply the organic layer.

18. Compounds of the formula (1 a)

where the symbols and indices used are:

Y is selected from O or S;

L is identical or different at each occurrence, an aromatic ring system having 6 to 18 carbon atoms, preferably phenylene,

Biphenylene, naphthylene, phenanthrenylene or triphenylenylene, which may be substituted by one or more radicals R ⁵ ;

An, Ar2 are each independently in each occurrence an aryl or Fleteroarylgruppe having 5 to 40 aromatic ring atoms, which may be substituted ³ with one or more radicals R;

R * is the same or different at each occurrence as a straight-chain alkyl group having 1 to 10 C atoms or an aryl group having 6 to 12 C atoms, where two substituents R * together form a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system may be substituted with one or more R radicals; R is the same or different at each occurrence selected from the group consisting of D, F, CN or an aryl group having 6 to 10 carbon atoms;

R ³ is the same or different on each occurrence selected from the group consisting of H, D, F, CN, N (Ar) 2, an aliphatic

Hydrocarbon radical having 1 to 20 carbon atoms or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, in which one or more Fl atoms may be replaced by D, F, Cl, Br, I or CN and the may be substituted by one or more alkyl groups each having 1 to 4 carbon atoms; two or more adjacent substituents R ^{3 may} together form a mono- or polycyclic aliphatic ring system;

R ⁵ is the same or different on each occurrence selected from the group consisting of D, F, CN and an aryl group having 6 to 18

C atoms, while two or more adjacent substituents R ⁵ together form a mono- or polycyclic aliphatic ring system;

n and m independently of each other denote 0, 1, 2 or 3 and each

o means independently at each occurrence 0, 1, 2, 3, 4, 5, 6 or 7.

19. Compounds according to claim 18, selected from the group of

links

25

30