CN105590944A - OLED flexible display device - Google Patents
OLED flexible display device Download PDFInfo
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- CN105590944A CN105590944A CN201410578898.0A CN201410578898A CN105590944A CN 105590944 A CN105590944 A CN 105590944A CN 201410578898 A CN201410578898 A CN 201410578898A CN 105590944 A CN105590944 A CN 105590944A
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Abstract
Disclosed in the invention is an OLED flexible display device comprising a flexible substrate. A cathode layer, an organic light-emitting unit, an anode layer and a coverage layer are prepared successively on the flexible substrate, wherein the material for manufacturing the coverage layer is an inorganic material TiO2 or SiC having good water-resistant and oxygen-resistant performances. According to the OLED flexible display device, the traditional OLED structure is inverted; the flexible substrate is plated with the cathode layer with the easy oxidation property directly; and the organic light-emitting unit, the anode layer and the coverage layer cover the cathode layer, so that an objective that the cathode layer can be protected from being oxidized can be achieved. In addition, the inorganic material with the good water-resistant and oxygen-resistant performances is used as the material for manufacturing the coverage layer, so that the water-resistant and oxygen-resistant performances of the OLED device can be improved and the service life of the OLED device can be prolonged.
Description
Technical field
The present invention relates to OLED Display Technique, refer in particular to a kind of OLED flexible display device.
Background technology
Existing OLED flexible display device (FlexibleOLED), generally adopts top radiation pattern(topemission), the structure of traditional top radiation pattern OLED flexible display device is as Fig. 1 instituteShow, comprise successively from bottom to up: flexible base, board 91, anode layer 92, hole injection layer (HIL)93, hole transmission layer (HTL) 94, organic luminous layer (EML) 95, electron transfer layer (ETL)96, electron injecting layer (EIL) 97, cathode layer 98 and cover layer 99.
Wherein, first evaporation anode layer 92 on flexible base, board 91, anode layer 92 adopts ITO/Ag/ITOFilm, thickness is 100nm～200nm; Evaporation organic layer successively on anode layer 92 again: hole noteEnter layer (HIL) 93, hole transmission layer (HTL) 94, organic luminous layer (EML) 95, electronicsTransport layer (ETL) 96 and electron injecting layer (EIL) 97; Evaporation cathode layer 98 again, cathode layer98 adopt Mg:Ag alloy, and thickness is 15nm～25nm; Finally on cathode layer 98, prepare one againLayer cover layer 99, cover layer 99 adopts organic material conventionally.
For obtaining high pure color and high efficiency, be generally by regulate its micro-cavity structure (be organic layer HIL,One deck in HTL, EML, ETL, EIL or which floor), realize high pure color and high efficiency. But,Traditional OLED flexible display device, the problem that ubiquity efficiency and life-span are too low, is mainlyBecause the packaged type of OLED flexible display device is thin-film package, in deflection process, filmEncapsulation may form tiny passage, makes water oxygen arrive OLED flexible display device. Again becauseCover layer adopts organic material conventionally, and its oxygen ability that blocks water is very weak, and cathode layer employing is comparatively activeMg:Ag alloy, very easily reacts and causes component failure after contact water oxygen.
Summary of the invention
Because very easily occur anti-in above-mentioned prior art after OLED flexible display device contact water oxygenShould to cause component failure problem, in order addressing this problem, to the invention provides a kind of OLED softProperty display device, comprising:
Flexible base, board, is prepared with cathode layer, organic light-emitting units, anode successively on described flexible base, boardLayer and cover layer, described tectal material is the inorganic material TiO with water-fast oxygen2OrSiC。
OLED flexible display device of the present invention, by traditional OLED structure is inverted,The cathode layer of easily oxidation is directly plated and is located on flexible base, board, then cover organic light emission on cathode layerUnit, anode layer and cover layer, reach the not oxidated object of protection cathode layer. In addition, adoptThere is the inorganic material TiO of water-fast oxygen2Or SiC is as tectal material, can strengthen OLEDThe oxygen ability that blocks water of device, the life-span of effectively improving OLED device. And, TiO2With SiC'sRefractive index is higher, can further improve the optical purity of OLED device.
The further improvement of OLED flexible display device of the present invention is, described tectal thicknessFor 50nm～80nm. The refractive index of mixed mulch layer, is arranged on 50nm～80nm by tectal thicknessIn scope, can further improve the optical purity of OLED device.
The further improvement of OLED flexible display device of the present invention is, the material of described anode layerFor Au, Pt or Ti. Good stability and the work function of Au, Pt or Ti are high, preferably stabilityCan protect organic light-emitting units, higher work function can effectively improve the injection efficiency in hole.
The further improvement of OLED flexible display device of the present invention is, the thickness of described anode layerFor 10nm～20nm. (reflectivity and transmissivity are thus anode layer to be made as to half-reflection and half-transmission layer50%), can improve the microcavity effect of OLED device.
The further improvement of OLED flexible display device of the present invention is, the material of described cathode layerFor Mg. The work function of Mg is lower, can effectively improve the injection efficiency of electronics.
The further improvement of OLED flexible display device of the present invention is, the thickness of described cathode layerFor 100nm～200nm. The refractive index of comprehensive cathode material, is made as the thickness of cathode layerWithin the scope of 100nm～200nm, form a total reflection negative electrode, can improve the microcavity of OLED deviceEffect.
The further improvement of OLED flexible display device of the present invention is, described organic light-emitting unitsComprise electron injecting layer, electron transfer layer, organic luminous layer, hole transmission layer and hole injection layer,Described electron injecting layer, electron transfer layer, organic luminous layer, hole transmission layer and hole are injectedLayer is prepared on described cathode layer successively.
The further improvement of OLED flexible display device of the present invention is, described hole injection layer bagDraw together the 3rd hole injection layer, the second hole injection layer and the first hole injection layer, the 3rd described skyCave implanted layer, the second hole injection layer and the first hole injection layer are prepared in described hole transport successivelyOn layer. Different hole injection layer effect differences, the Main Function of the first hole injection layer is to increase noteEnter efficiency, the Main Function of the second hole injection layer and the 3rd hole injection layer is for strengthening microcavity effect.
Brief description of the drawings
Fig. 1 is the structural representation of traditional OLED flexible display device.
Fig. 2 is the structural representation of OLED flexible display device of the present invention.
Fig. 3 is the structural representation of the preferred embodiment of OLED flexible display device of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawingAnd embodiment, the present invention is further elaborated. Should be appreciated that described herein concreteEmbodiment only, in order to explain the present invention, is not intended to limit the present invention.
Fig. 2 is the structural representation of OLED flexible display device of the present invention, coordinates referring to Fig. 2, thisThe OLED flexible display device of invention, comprising:
Flexible base, board 10, is prepared with cathode layer 20, organic light-emitting units successively on flexible base, board 1030, anode layer 40 and cover layer 50, the material of cover layer 50 is have water-fast oxygen inorganicMaterial TiO2Or SiC. Wherein, organic light-emitting units 30 comprises that electron injecting layer 310, electronics passDefeated layer 320, organic luminous layer 330, hole transmission layer 340 and hole injection layer 350, electronicsImplanted layer 310, electron transfer layer 320, organic luminous layer 330, hole transmission layer 340 and skyCave implanted layer 350 is prepared on cathode layer 20 successively.
Preferably, the refractive index of mixed mulch layer, is arranged on 50nm～80nm by the thickness of cover layer 50In scope, can further improve the optical purity of OLED device. TiO2With the refractive index of SiC allHeight, can further improve the optical purity of OLED device. The material of anode layer 40 adopts Au, PtOr Ti. Good stability and the work function of Au, Pt or Ti are high, and stability can be protected organic preferablyLuminescence unit, higher work function can effectively improve the injection efficiency in hole. The thickness of anode layer 40For 10nm～20nm, (reflectivity and transmissivity are thus anode layer 40 to be made as to half-reflection and half-transmission layer50%), can improve the microcavity effect of OLED device. The material of cathode layer 20 adopts Mg, MgWork function lower, can effectively improve the injection efficiency of electronics. The refractive index of comprehensive cathode material, willThe thickness of cathode layer 20 is made as within the scope of 100nm～200nm, forms a total reflection negative electrode, canImprove the microcavity effect of OLED device.
OLED flexible display device of the present invention, by traditional OLED structure is inverted,And change cathode layer, anode layer and tectal material and thickness, have the following advantages:
The first, the cathode layer of easily oxidation is directly plated and is located on flexible base, board, then cover on cathode layerLid organic light-emitting units, anode layer and cover layer, reach the not oxidated object of protection cathode layer.
The second, the material of cathode layer adopts the lower Mg of work function can effectively improve the injection effect of electronicsRate.
The 3rd, the material of anode layer adopts Au, Pt or Ti. The good stability of Au, Pt or Ti alsoAnd work function is high, stability can be protected organic light-emitting units preferably, and higher work function can effectively be carriedThe injection efficiency of high hole. The thickness of anode layer is 10nm～20nm, thus anode layer is made as to halfAnti-semi-permeable layer (reflectivity and transmissivity are 50%), can improve the microcavity effect of OLED device.
The 4th, tectal material adopts the inorganic material TiO with water-fast oxygen2Or SiC, canStrengthen the oxygen ability that blocks water of OLED device, the life-span of effectively improving OLED device. And, TiO2All higher with the refractive index of SiC, can further improve the optical purity of OLED device.
Fig. 3 is the structural representation of the preferred embodiment of OLED flexible display device of the present invention, ginsengRead shown in Fig. 3, in this embodiment, OLED flexible display device of the present invention, comprising:
Flexible base, board 10, is prepared with cathode layer 20, organic light-emitting units successively on flexible base, board 1030, anode layer 40 and cover layer 50, the material of cover layer 50 is have water-fast oxygen inorganicMaterial TiO2Or SiC. Wherein, organic light-emitting units 30 comprises that electron injecting layer 310, electronics passDefeated layer 320, organic luminous layer 330, hole transmission layer 340, the 3rd hole injection layer 353, secondHole injection layer 352 and the first hole injection layer 351, electron injecting layer 310, electron transfer layer320, organic luminous layer 330, hole transmission layer 340, the 3rd hole injection layer 353, the second holeImplanted layer 352 and the first hole injection layer 351 are prepared on cathode layer 20 successively. Different skiesCave implanted layer effect difference, the Main Function of the first hole injection layer 351 is to increase injection efficiency, theThe Main Function of two hole injection layers 352 and the 3rd hole injection layer 353 is for strengthening microcavity effect.
The above is only preferred embodiment of the present invention, not the present invention is done any formalRestriction, although the present invention disclose as above with preferred embodiment, but not in order to limit the present invention,Any those skilled in the art, not departing from the scope of technical solution of the present invention, when can profitMake a little change or be modified to the equivalent embodiment of equivalent variations with the technology contents of above-mentioned announcement, butEvery content that does not depart from technical solution of the present invention, foundation technical spirit of the present invention is to above embodimentAny simple modification, equivalent variations and the modification done, all still belong to the scope of technical solution of the present inventionIn.
Claims (10)
1. an OLED flexible display device, is characterized in that, comprising:
Flexible base, board, is prepared with cathode layer, organic light-emitting units, anode successively on described flexible base, boardLayer and cover layer, described tectal material is the inorganic material TiO with water-fast oxygen2Or SiC.
2. OLED flexible display device as claimed in claim 1, is characterized in that, described in coverThe thickness of cap rock is 50nm～80nm.
3. OLED flexible display device as claimed in claim 1 or 2, is characterized in that, instituteThe material of stating anode layer is Au, Pt or Ti.
4. OLED flexible display device as claimed in claim 3, is characterized in that, described sunThe thickness of utmost point layer is 10nm～20nm.
5. OLED flexible display device as claimed in claim 3, is characterized in that, described the moonThe material of utmost point layer is Mg.
6. OLED flexible display device as claimed in claim 4, is characterized in that, described the moonThe material of utmost point layer is Mg.
7. OLED flexible display device as claimed in claim 5, is characterized in that, described the moonThe thickness of utmost point layer is 100nm～200nm.
8. OLED flexible display device as claimed in claim 6, is characterized in that, described the moonThe thickness of utmost point layer is 100nm～200nm.
9. OLED flexible display device as claimed in claim 7, is characterized in that, described in haveMachine luminescence unit comprise electron injecting layer, electron transfer layer, organic luminous layer, hole transmission layer andHole injection layer, described electron injecting layer, electron transfer layer, organic luminous layer, hole transmission layerAnd hole injection layer is prepared on described cathode layer successively.
10. OLED flexible display device as claimed in claim 8, is characterized in that, described skyCave implanted layer comprises the 3rd hole injection layer, the second hole injection layer and the first hole injection layer, instituteThe 3rd hole injection layer, the second hole injection layer and the first hole injection layer stated are prepared in institute successivelyState on hole transmission layer.
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| CN201410578898.0A CN105590944A (en) | 2014-10-24 | 2014-10-24 | OLED flexible display device |
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| CN201410578898.0A CN105590944A (en) | 2014-10-24 | 2014-10-24 | OLED flexible display device |
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| CN105590944A true CN105590944A (en) | 2016-05-18 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437589A (en) * | 2017-08-10 | 2017-12-05 | 长春海谱润斯科技有限公司 | A kind of OLED of the inverted structure containing coating |
| CN110429122A (en) * | 2019-08-07 | 2019-11-08 | 昆山梦显电子科技有限公司 | Silicon substrate micro display screen and preparation method thereof |
| CN110634443A (en) * | 2019-09-24 | 2019-12-31 | 京东方科技集团股份有限公司 | Light emitting element protection circuit and method for driving light emitting element protection circuit |
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| CN103137881A (en) * | 2011-11-22 | 2013-06-05 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and production method thereof |
| CN103688385A (en) * | 2011-07-19 | 2014-03-26 | 株式会社日立制作所 | Organic light-emitting element, light source device and organic light-emitting element manufacturing method |
| CN203521480U (en) * | 2013-10-12 | 2014-04-02 | 昆山工研院新型平板显示技术中心有限公司 | Package structure of flexible organic photoelectric device |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1202264A2 (en) * | 2000-10-27 | 2002-05-02 | Pioneer Corporation | Optical recording medium |
| CN102110753A (en) * | 2009-12-28 | 2011-06-29 | Lg伊诺特有限公司 | Light emitting device, light emitting device package and illumination system |
| CN103688385A (en) * | 2011-07-19 | 2014-03-26 | 株式会社日立制作所 | Organic light-emitting element, light source device and organic light-emitting element manufacturing method |
| CN102956712A (en) * | 2011-08-22 | 2013-03-06 | 索尼公司 | Display, method of manufacturing the same and electric apparatus |
| CN103137881A (en) * | 2011-11-22 | 2013-06-05 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and production method thereof |
| CN203521480U (en) * | 2013-10-12 | 2014-04-02 | 昆山工研院新型平板显示技术中心有限公司 | Package structure of flexible organic photoelectric device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107437589A (en) * | 2017-08-10 | 2017-12-05 | 长春海谱润斯科技有限公司 | A kind of OLED of the inverted structure containing coating |
| CN110429122A (en) * | 2019-08-07 | 2019-11-08 | 昆山梦显电子科技有限公司 | Silicon substrate micro display screen and preparation method thereof |
| CN110634443A (en) * | 2019-09-24 | 2019-12-31 | 京东方科技集团股份有限公司 | Light emitting element protection circuit and method for driving light emitting element protection circuit |
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