CN100524890C - Organic electroluminescent element, panel display and portable electronic device - Google Patents
Organic electroluminescent element, panel display and portable electronic device Download PDFInfo
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- CN100524890C CN100524890C CNB2005100542684A CN200510054268A CN100524890C CN 100524890 C CN100524890 C CN 100524890C CN B2005100542684 A CNB2005100542684 A CN B2005100542684A CN 200510054268 A CN200510054268 A CN 200510054268A CN 100524890 C CN100524890 C CN 100524890C
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- organic electroluminescent
- electroluminescent element
- optical compensating
- light transmission
- transmission optical
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Abstract
This invention provides an organic electric excitation luminous element including a base plate, a transparent anode, a transparent cathode set oppositely and an organic luminous layer, among which, said transparent anode and cathode are set on said base plate and the organic luminous layer is set between them. Said element also includes a light transmission optical compensation layer made of transition metal oxide and set between the transparent anode and the cathode or on the surface of the cathode.
Description
Technical field
The present invention relates to a kind of organic electroluminescent element (organic electro luminescence device), particularly relate on the transparent anode surface or flat-panel screens and portable electronic device that the transparent cathode surface is provided with the organic electroluminescent element of optical compensating layer (opticalcompensator) and uses this organic electroluminescent element.
Background technology
Organic electroluminescent element does not need to be provided with (backlight) the backlight module as liquid crystal indicator, therefore can simplify technology.Along with the technology of organic electroluminescent element develops rapidly, organic electroluminescent element has been applied to various electronic installations with viewing area gradually, especially portable electronic devices, for example mobile phone, personal digital assistant, portable computer, digital camera, digital code camera etc.The brightness, luminous efficiency that how to improve organic electroluminescent element reduce power consumption and the useful life that prolongs organic electroluminescent element to reach, and are one of important topic of those skilled in the art's research and development.
United States Patent (USP) the 5th, 714, disclose a kind of top emission type organic electroluminescent element for No. 838, by formation calcium film or calcium alloy film at transparency electrode (ZnS, GaN, ITO etc.) and organic luminous layer, in case here the material among the transparency electrode toward the organic luminous layer diffusion.Yet, this calcium film or calcium alloy film be formed with the luminous efficiency that may influence organic electroluminescent element.
United States Patent (USP) the 6th, 831 discloses a kind of Organic Light Emitting Diode No. 407, utilizes and form rough structure among organic luminous layer, and improving luminous efficiency, yet it is comparatively complicated to form the technology of rough structure.
Therefore, have and to provide a kind of and can improve luminous efficiency and simplify the organic electroluminescent element of technology and the flat-panel screens of using this organic electroluminescent element.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of organic electroluminescent element, utilize optical compensating layer to produce constructive interference effect (construction interference), and improve the luminous efficiency (luminance efficiency) of organic electroluminescent element, even improve the colour cast (color shift) on the visual angle.
Another object of the present invention is to provide a kind of organic electroluminescent element, select the transition metal oxide (transition metaloxide) of the single or multiple lift that can form in evaporation modes such as (evaporation) for use, to be adjacent to transparent anode or transparent cathode, do not need complicated technology to use the production efficiency that improves organic electroluminescent element.
According to above-mentioned purpose, the invention provides a kind of organic electroluminescent element, comprise a substrate, transparent anode, the transparent cathode that is oppositely arranged and organic luminous layer, this transparent anode and transparent cathode are arranged on the aforesaid substrate, and organic luminous layer is arranged between above-mentioned transparent anode and the above-mentioned transparent cathode.Above-mentioned organic electroluminescent element also comprises at least one printing opacity sexology layer of compensation, be arranged between transparent anode and the substrate and/or be arranged at the surface of transparent cathode, and this light transmission optical compensation layer material is constituted by transition metal oxide.
Moreover the deposit thickness of being used as the transition metal oxide of optical compensating layer can be below 10,000 dusts, and is wherein better with the thickness of 500 dust to 1000 dusts again.Moreover the optical characteristics of this optical compensating layer for example is, be not more than 3.5 haply in the n value of wavelength of visible light (380nm to 780nm) refractive index (n-ik), and the k value of refractive index (n-ik) is haply less than 0.2.
Moreover above-mentioned optical compensating layer for example is to use light transmittance to reach material more than 40%, in addition, and the high more luminous efficiency that helps more of the light transmittance of optical compensating layer.
Secondly, the method for above-mentioned optical compensating layer formation comprises electron beam deposition, hot evaporation, molecular beam epitaxy, vapour phase epitaxy or Metalorganic chemical vapor deposition method.
In addition, the present invention also provides a kind of flat-panel screens and portable electronic device that uses organic electroluminescent element.
Moreover above-mentioned portable electronic device for example is mobile phone, hand held game device, digital code camera, digital video recorder, digital broadcast device, personal digital assistant or portable computer.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, following conjunction with figs. and preferred embodiment are to illustrate in greater detail the present invention.
Description of drawings
Fig. 1 is the generalized section according to the organic electroluminescent element with optical compensating layer of first embodiment of the invention.
Fig. 2 is the generalized section according to the organic electroluminescent element with optical compensating layer of second embodiment of the invention.
Fig. 3 is the generalized section according to the organic electroluminescent element with optical compensating layer of third embodiment of the invention.
Fig. 4 is the generalized section according to the single layer optical layer of compensation of the embodiment of the invention.
Fig. 5 is the generalized section according to the multilayer optical compensation layer of the embodiment of the invention.
Fig. 6 is the generalized section according to the organic electroluminescent element with optical compensating layer of fourth embodiment of the invention.
Fig. 7 is the generalized section according to the organic electroluminescent element with optical compensating layer of fifth embodiment of the invention.
Fig. 8 is the generalized section according to the organic electroluminescent element with optical compensating layer of sixth embodiment of the invention.
Fig. 9 is the schematic diagram according to the flat-panel screens of the embodiment of the invention.
Figure 10 A is the mobile phone schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention.
Figure 10 B is the digital camera schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention.
Figure 10 C is the personal digital assistant schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention.
Figure 10 D is the hand-held computer schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention.
Figure 10 E is the digital playing device schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention.
Figure 10 F is the digital video recorder schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention.
The simple symbol explanation
10,20,30,40,50,60,70,200～organic electroluminescent element
100～substrate
102,102a, 102b～first light transmission optical compensating layer
103b～hole transmission layer
103a～hole injection layer
104～transparent anode
105～conductive polymer layer
106～organic luminous layer
107a～electron injecting layer
107b～electron transfer layer
108～transparent cathode
110～the second light transmission optical compensating layers
A, B～light emission direction
202～peripheral element
301,401,501,601,701,802～main body
302,602,702～housing
303,402,502,603,702,802～viewing area
306,404,504,604,706,804～operation push-button
307,405,605～external connecting
308～antenna
406～shutter
403,806～image acceptance division
503～mains switch
606～Trackpad mouse
705～medium reading part
707～loud speaker
803～sound input part
805～battery
Embodiment
Fig. 1 is the generalized section according to the dual-side luminescent type organic electroluminescent element with optical compensating layer of first embodiment of the invention.This organic electroluminescent element 10 comprises for example substrate 100, the transparent anode 104 and the transparent cathode 108 that is oppositely arranged of glass material, quartz or plastic base formation.In addition, this organic electroluminescent element 10 also comprises organic luminous layer 106, is arranged between above-mentioned transparent anode 104 and the above-mentioned transparent cathode 108, and directly contacts with transparent cathode 108 with transparent anode 104.This organic electroluminescent element 10 also comprises first light transmission (light transmittable) optical compensating layer 102 that is arranged at respectively between substrate 100 and the transparent anode and is arranged at the second light transmission optical compensating layer 110 on the transparent cathode 108.This first, second light transmission optical compensating layer 102,110 can adopt and be not more than 10, the transition metal oxide of 000 dust constitutes, its preferred thickness is approximately between 500 dust to 1000 dusts, and the n value of this first light transmission optical compensating layer 102 or the second light transmission optical compensating layer, 110 refractive indexes (n-ik) is not more than 3.5 haply between wave-length coverage 380nm to 780nm, and the k value of refractive index (n-ik) between wave-length coverage 380nm to 780nm haply less than 0.2.
The step that forms this organic electroluminescent element 10 is to form the first light transmission optical compensating layer 102, transparent anode 104, organic luminous layer 106, transparent cathode 108 and the second light transmission optical compensating layer 110 in regular turn on substrate 100 surfaces.It should be noted that the above-mentioned first light transmission optical compensating layer 102, the second light transmission optical compensating layer 110 can adopt hot vapour deposition method (thermal evaporation), means of electron beam deposition (electrical beam deposition), molecular beam epitaxy (molecular beam epitaxy), vapour phase epitaxy (vapor phase epitaxy; VPE), Metalorganic chemical vapor deposition method (metal organicchemical vapor deposition; MOCVD) or thermal resistance wire vapour deposition method (resistance heatingevaporation).
Moreover the first light transmission optical compensating layer or the second light transmission optical compensating layer are selected from by titanium dioxide (TiO
2) layer, tungstic acid (WO
3) layer, three oxidations, two tantalum (Ta
2O
3), vanadic oxide (V
2O
5), zinc oxide (ZnO), zirconia (ZrO), ceria (CeO
2), niobium pentaoxide (Nb
2O
5), gadolinium oxide (Gd
2O
3), chrome green (Cr
2O
3), nickel oxide (NiO), bismuth oxide (Bi
2O
3), samarium oxide (SmO) and neodymia (Nd
2O
5) group or its combination that constitute.
The first light transmission optical compensating layer 102 that is formed at substrate 100 surfaces can be the double-decker that comprises below optical compensating layer 102a and top optical compensating layer 102b, as shown in Figure 4.Also can be single layer structure as shown in Figure 5, moreover the thickness of below optical compensating layer 102a and top optical compensating layer 102b be respectively between 500 dust to 1000 dusts, is preferably between 700 dust to 900 dusts.Yet, the invention is not restricted to this, the first light transmission optical compensating layer 102 also can be two-layer above structure.Moreover the second light transmission optical compensating layer 110 also can be individual layer, bilayer or double-deck above structure.
Organic luminous layer 106 for example is three (oxine closes) aluminium (III) Alq that mixes
3 (Tris (8-hydroxyquinolinato) aluminum (III), when organic electroluminescent element 10 is subjected to forward bias voltage drop that direct current produces, the voltage that adds injects organic luminous layer 106 by transparent cathode 108 and transparent anode 104 respectively with electronics and hole, make the chemical molecular among the organic luminous layer 106 be subjected to energy excitation, and produce fluorescence (fluorescence) or phosphorescence (phosphorescence), then discharge toward light emission direction A (direction of arrow) with substrate 100 via transparent anode 104, the first light transmission optical compensating layer 102.On the other hand, the fluorescence of organic luminous layer 106 generations or phosphorescence also discharge toward light emission direction B (direction of arrow) via the transparent cathode 108 and the second light transmission optical compensating layer 110.In detail, the organic electroluminescent element 10 of present embodiment is can upwards luminous (A direction) and the dual-side luminescent type organic electroluminescent element of luminous (B direction) downwards.
Next, please refer to Fig. 2, it is the generalized section according to the organic electroluminescent element with optical compensating layer 20 of second embodiment of the invention, the organic electroluminescent element 20 of second embodiment and the organic electroluminescent element 10 of first embodiment are roughly the same, comprise the first light transmission optical compensating layer 102, transparent anode 104, organic luminous layer 106 and the transparent cathode 108 that are formed at substrate 100 in regular turn, yet do not form the second light transmission optical compensating layer 110 among the organic electroluminescent element 10.
Next, please refer to Fig. 3, it is according to the generalized section of the organic electroluminescent element with optical compensating layer 30 of third embodiment of the invention, the organic electroluminescent element 20 of the 3rd embodiment and the organic electroluminescent element 10 of first embodiment are roughly the same, comprise the transparent anode 104, organic luminous layer 106, transparent cathode 108 and the second light transmission optical compensating layer 110 that are formed at substrate 100 in regular turn, yet do not need to form the first light transmission optical compensating layer 102 among the organic electroluminescent element 10.
Then, please refer to Fig. 6, it is according to the generalized section of the organic electroluminescent element with optical compensating layer 40 of fourth embodiment of the invention.The organic electroluminescent element 40 of the 4th embodiment and the organic electroluminescent element 10 of first embodiment are roughly the same, comprise the first light transmission optical compensating layer 102, transparent anode 104, organic luminous layer 106, transparent cathode 108 and the second light transmission optical compensating layer 110 that are formed at substrate 100 in regular turn, and, organic electroluminescent element 40 also is included between transparent anode 104 and the organic luminous layer 106 conductive polymer layer 105 is set, be used as hole injection layer, for example adopt polystyrene dioxy base thiophene (polystyrene dioxythiophene; PEDT) or sulfonic acid polystyrene (polystyrene sulphonate; PSS) mixture.That the organic luminous layer 106 of present embodiment can adopt is poly-(to the inferior ethene of phenylene) (poly (p-phenylene vinylene); PPV).
Then, please refer to Fig. 7, it is according to the generalized section of the organic electroluminescent element with optical compensating layer 50 of fifth embodiment of the invention.The organic electroluminescent element 50 of the 5th embodiment and the organic electroluminescent element 10 of first embodiment are roughly the same, the organic electroluminescent element 50 that comprises the first light transmission optical compensating layer 102, transparent anode 104, organic luminous layer 106, transparent cathode 108 and the second light transmission optical compensating layer, 110, the five embodiment that are formed at substrate 100 in regular turn also comprises hole transmission layer 103b and electron transfer layer 107b.Above-mentioned hole injection layer 103a can adopt NPB (naphtha-phenyl benzidine), and electron transfer layer 107b can adopt Alq3.
Then, please refer to Fig. 8, it is according to the generalized section of the organic electroluminescent element with optical compensating layer 60 of sixth embodiment of the invention.The organic electroluminescent element 60 of the 6th embodiment and the organic electroluminescent element 50 of the 5th embodiment are roughly the same, the organic electroluminescent element 50 that comprises the first light transmission optical compensating layer 102, transparent anode 104, hole transmission layer 103b, organic luminous layer 106, electron transfer layer 107b, transparent cathode 108 and the second light transmission optical compensating layer, 110, the six embodiment that are formed at substrate 100 in regular turn also comprises hole injection layer 103a and electron injecting layer 107a.Above-mentioned hole injection layer 103a for example is CuPc (copper phthalocyanine).Electron injecting layer 107a can use the lithium fluoride film.
The above embodiment of the present invention is provided with optical compensating layer at the transparent anode 104 of organic electroluminescent element and/or the bright dipping side of transparent cathode 108, after the empirical tests, the luminous efficiency of finding organic electroluminescent element has had significant improvement, in addition, also improved the color offset phenomenon of organic electroluminescent element on the visual angle.
Fig. 9 is the schematic diagram according to the flat-panel screens of the embodiment of the invention, the flat-panel screens after the peripheral element 202 of its any one organic electroluminescent element 200 that comprises the embodiment of the invention and external frame and external circuit makes up.
The example of the portable electronic devices of the organic electroluminescent element that uses the arbitrary embodiment of the present invention is below described.
Figure 10 A is the mobile phone schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention, and this mobile phone comprises main body 301, housing 302, uses viewing area 303, operation push-button 306, external connecting 307, the antenna 308 of the organic electroluminescent element of the arbitrary embodiment of the present invention.
Figure 10 B is the digital camera schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention.Digital camera shown in Figure 10 B comprises main body 401, uses viewing area 402, image acceptance division 403, operation push-button 404, external connecting 405 and the shutter 406 of the organic electroluminescent element of the arbitrary embodiment of the present invention.
Figure 10 C is the personal digital assistant schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention, and this personal digital assistant comprises main body 501, viewing area 502, mains switch 503, operation push-button 504 and the infrared ray port 505 of using the organic electroluminescent element of the arbitrary embodiment of the present invention.
Figure 10 D is the hand-held computer schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention, and this hand-held computer comprises body 601, housing 602, uses viewing area 603, operation push-button 604, external connecting 605 and the Trackpad mouse 606 of the organic electroluminescent element of the arbitrary embodiment of the present invention.
Figure 10 E is the digital playing device schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention, this digital playing-type device that is digital video video disc or similar playing device, it comprises main body 701, housing 702, uses viewing area 703, medium reading part 705, operation push-button 706 and the loud speaker 707 of the organic electroluminescent element of the arbitrary embodiment of the present invention.
Figure 10 F is the digital video recorder schematic diagram that comprises the organic electroluminescent element of the embodiment of the invention, and above-mentioned digital video recording machine comprises main body 801, uses organic electroluminescent element 802, sound input part 803, operation push-button 804, battery 805 and the image acceptance division 806 of the arbitrary embodiment of the present invention.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; those skilled in the art can do a little change and retouching without departing from the spirit and scope of the present invention, thus protection scope of the present invention should with accompanying Claim the person of being defined be as the criterion.
Claims (14)
1. organic electroluminescent element comprises:
One substrate;
The transparent cathode that one transparent anode and is oppositely arranged is arranged on this substrate;
One organic luminous layer is arranged between this transparent anode and this transparent cathode;
One first light transmission optical compensating layer is arranged between this transparent anode and this substrate; And
One second light transmission optical compensating layer is arranged on this transparent cathode;
Wherein this first light transmission optical compensating layer or the second light transmission optical compensating layer are selected from group or its combination that is made of tungstic acid, three oxidations, two tantalums, vanadic oxide, ceria, niobium pentaoxide, gadolinium oxide, chrome green, nickel oxide, bismuth oxide, samarium oxide and neodymia.
2. organic electroluminescent element as claimed in claim 1, wherein the n value of the refractive index (n-ik) of this first light transmission optical compensating layer or the second light transmission optical compensating layer is not more than 3.5 between wave-length coverage 380nm to 780nm, and the k value of refractive index (n-ik) between wave-length coverage 380nm to 780nm less than 0.2.
3. organic electroluminescent element as claimed in claim 1, wherein this first light transmission optical compensating layer or the second light transmission optical compensating layer are single layer structure.
4. organic electroluminescent element as claimed in claim 1, wherein this first light transmission optical compensating layer or the second light transmission optical compensating layer are sandwich construction.
5. organic electroluminescent element as claimed in claim 1, wherein the thickness of this first light transmission optical compensating layer or the second light transmission optical compensating layer is not more than 10,000 dusts.
6. organic electroluminescent element as claimed in claim 5 is wherein between thickness in 500 to 1000 dusts of this first light transmission optical compensating layer or the second light transmission optical compensating layer.
7. organic electroluminescent element as claimed in claim 1, wherein this transparent anode comprises indium tin oxide or indium-zinc oxide.
8. organic electroluminescent element as claimed in claim 1, wherein this transparent cathode comprises indium tin oxide or indium-zinc oxide.
9. organic electroluminescent element as claimed in claim 1 also comprises a hole injection layer, is arranged between this transparent anode and this organic luminous layer.
10. organic electroluminescent element as claimed in claim 1 also comprises:
One electron transfer layer is adjacent to this transparent cathode; And
One hole transmission layer is adjacent to this transparent anode.
11. organic electroluminescent element as claimed in claim 1, wherein this first light transmission optical compensating layer or the second light transmission optical compensating layer by electron beam deposition, hot evaporation, molecular beam epitaxy, vapour phase epitaxy, and Metalorganic chemical vapor deposition any and form.
12. a flat-panel screens comprises organic electroluminescent element as claimed in claim 1.
13. a portable electronic device comprises organic electroluminescent element as claimed in claim 1.
14. portable electronic device as claimed in claim 13, wherein this portable electronic device comprises mobile phone, hand held game device, digital code camera, digital video recorder, digital broadcast device, personal digital assistant, portable computer.
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| CNB2005100542684A CN100524890C (en) | 2005-03-21 | 2005-03-21 | Organic electroluminescent element, panel display and portable electronic device |
Applications Claiming Priority (1)
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|---|---|---|---|
| CNB2005100542684A CN100524890C (en) | 2005-03-21 | 2005-03-21 | Organic electroluminescent element, panel display and portable electronic device |
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| CN1668154A CN1668154A (en) | 2005-09-14 |
| CN100524890C true CN100524890C (en) | 2009-08-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108666446A (en) * | 2018-05-16 | 2018-10-16 | 云谷（固安）科技有限公司 | Organic electroluminescence device and Organnic electroluminescent device |
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| CN101231407B (en) * | 2007-01-24 | 2010-12-29 | 群康科技(深圳)有限公司 | Flat display device |
| CN103050637B (en) * | 2011-10-17 | 2015-11-25 | 海洋王照明科技股份有限公司 | Semi-hollow spherical organic electroluminescent device and preparation method thereof |
| CN103311447A (en) * | 2012-03-06 | 2013-09-18 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and preparation method thereof |
| CN103367648A (en) * | 2012-04-11 | 2013-10-23 | 海洋王照明科技股份有限公司 | Organic electroluminescence device and manufacturing method thereof |
| CN103378309A (en) * | 2012-04-28 | 2013-10-30 | 海洋王照明科技股份有限公司 | Organic light-emitting device and manufacturing method thereof |
| CN104009161B (en) * | 2013-02-26 | 2017-02-08 | 珠海光合作用光电设计有限公司 | Organic electroluminescent device |
| CN104124358A (en) * | 2013-04-24 | 2014-10-29 | 海洋王照明科技股份有限公司 | Organic light-emitting device and preparation method thereof |
| CN104124341A (en) * | 2013-04-24 | 2014-10-29 | 海洋王照明科技股份有限公司 | Organic light-emitting device and preparation method thereof |
| CN110828699B (en) * | 2019-11-27 | 2022-03-08 | 昆山国显光电有限公司 | Display panel and electronic device |
| CN113760115A (en) * | 2020-06-05 | 2021-12-07 | 瀚宇彩晶股份有限公司 | Touch panel and manufacturing method thereof |
-
2005
- 2005-03-21 CN CNB2005100542684A patent/CN100524890C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108666446A (en) * | 2018-05-16 | 2018-10-16 | 云谷（固安）科技有限公司 | Organic electroluminescence device and Organnic electroluminescent device |
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| CN1668154A (en) | 2005-09-14 |
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