CN1805170A - Electron injection type organic electroluminescent display component - Google Patents
Electron injection type organic electroluminescent display component Download PDFInfo
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- CN1805170A CN1805170A CN 200610041625 CN200610041625A CN1805170A CN 1805170 A CN1805170 A CN 1805170A CN 200610041625 CN200610041625 CN 200610041625 CN 200610041625 A CN200610041625 A CN 200610041625A CN 1805170 A CN1805170 A CN 1805170A
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Abstract
The invention relates to a electric injection organic electroluminescence display device, which comprises a glass basic plate, the ITO conductive layer, cavity transmission layer, lighting layer, electric transmission layer and the metallic cathode which are arranged on the glass basic plate from down to up; wherein, the ITO conductive layer and the metallic cathode layer are connected to the positive and passive electrodes of direct current voltage; the upper and lower surfaces of said metallic cathode and electric transmission layer individually comprise matched protrusions; the upper surface of lighting layer comprises the protrusion matching the lower surface of electric transmission layer whose height is 20-40 nanometers and the distance is 150-300 microns. The invention sets protrusions on the metallic cathode, electric transmission layer and the lighting layer of OLED device, to improve the effective contact area between the electric transmission layer and the metallic cathode and the lighting layer, to improve the electric injection efficiency, improve the compound lighting rate between the electron and the cavity, and improve the lighting efficiency, brightness and service life of OLED device.
Description
Technical field
The invention belongs to the organic elctroluminescent device (OLED) in flat panel display field, be specifically related to a kind of electron injection type organic electroluminescent display component.
Background technology
1987, at first reported since the Tang of Kodak since the Organic Light-Emitting Display device of double-deck high efficiency, high brightness, caused that people pay close attention to greatly, low because of its driving voltage, luminosity is high, rich color and technology simply can be made into the research focus that advantages such as large-area flat-plate demonstration become current flat panel display field.Luminous efficiency and luminescent lifetime are two critical problems of organic electroluminescence device practicability, but there is a theoretical limit in electroluminescent efficiency.In order can under the situation that needs high light such as illumination or Backlight For Liquid Crystal Display Panels etc., to be applied, must develop the organic electroluminescence device of high efficiency, high brightness.
After OLED device layers of material is determined, how better to improve the luminous efficiency of device and the focus that brightness becomes people's research, the luminescence mechanism of organic electroluminescence device comprises that electronics and hole are from the injection of electrode, the formation and the recombination luminescence of exciton, wherein, the injection balance of hole and electronics is very important.In organic electroluminescence device, owing to have energy level difference between organic layer and the electrode, thereby the formation interface potential barrier, organic layer will be injected in electronics and hole just must overcome interface potential barrier, so the contact property of organic layer and electrode directly influences the injection efficiency of charge carrier.Can control the injection of charge carrier by the height of regulating potential barrier between organic layer and the electrode, change the photoelectric characteristic of device then, overcoming the charge carrier injection barrier needs sufficiently high electric field strength, that is to say that injection efficiency is controlled by electric field strength; Under External Electrical Field, improve the injection efficiency of charge carrier, contact berrier is low more good more.Should select the low material of work function to make negative electrode, the material that work function is high is made anode, and that so just can reduce the charge carrier injection can be with potential barrier, thereby reduces required operating voltage.The height of potential barrier depends on the poor of organic material energy level and electrode work function, therefore can effectively control the injection of charge carrier by the electrode that adopts different work functions.Inject in order to be beneficial to charge carrier, should adopt the hole injecting electrode of high work function and the electron injection electrode of low work function as far as possible.Under External Electrical Field, injected holes and electronics move to negative electrode and anode respectively, and this dynamic process is called the transmission of charge carrier.The thickness of organic electroluminescence device only is hundreds of nanometers, so just can produce very high electric field at luminescent layer under lower voltage, the efficiency of transmission of charge carrier is strengthened greatly.Generally in electroluminescence, two kinds of charge carriers need could guarantee that than injecting organic layer with identical speed positive negative carrier is in the effective combination of luminescent layer with high injection from two electrodes, but, be difficult to make simultaneously the negative electrode of low work function and the anode of high work function and conduction band, the valence band of organic layer to be complementary because major part is organic or the forbidden band broad of macromolecular material.
It all is to concentrate in the brightness and efficient that improves organic assembly greatly that people's research work in recent years has.The brightness of organic electroluminescent and efficient all with material in charge carrier inject balance very big relation arranged.For the injection of equilibrium carrier to obtain the device of high efficiency and good stability, people have not only used electronics to inject combination electrodes such as more efficiently LiF/Al and CsF/Al, also used simultaneously the hole resilient coating, between ITO and NPB, use CuPc as S.A.VanSlyke etc., make the stability of device be significantly improved; A.Gyoutoku etc. make the half-life of device above 3500 hours with carbon film; Recently, Y.Kurosaka etc. and Z.B.Deng insert skim Al respectively between ITO and hole transmission layer
2O
3And SiO
2Improved the efficient of device, each layer of traditional OLED device is the plane of rule, and the injection efficiency of charge carrier is subjected to certain limitation, thereby influences the luminous efficiency and the brightness of device.
Summary of the invention
The object of the present invention is to provide a kind of long service life, operating voltage is low, energy consumption is little, the electron injection type organic electroluminescent display component of high brightness high-luminous-efficiency.
For achieving the above object, the technical solution used in the present invention is: the ITO conductive layer, hole transmission layer, luminescent layer, electron transfer layer and the metallic cathode that comprise glass substrate and be successively set on the glass substrate upper surface from bottom to top, be characterized in, the upper and lower surface of metallic cathode and electron transfer layer is respectively arranged with the projection of coincideing mutually, the upper surface of luminescent layer is provided with the projection that the lower surface with electron transfer layer matches equally, and the height of this projection is the 20-40 nanometer, and spacing is the 150-300 micron.
Another characteristics of the present invention are: the ITO conductive layer links to each other with the positive and negative electrode of direct voltage respectively with metallic cathode.
Because the angle that the present invention injects from carrier balance, shape to metallic cathode, electron transfer layer and luminescent layer in the OLED device is optimized design, a series of fluctuatings have clocklike been introduced, increased effective contact area of electron transfer layer and metallic cathode, luminescent layer greatly, improved the injection efficiency of electronics, to better meet the injection equilibrium condition in electronics and hole, therefore in luminescent layer, there is more charge carrier compound, thereby improved the luminous efficiency and the luminosity of OLED device greatly, reduced operating voltage and power consumption.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are described in further detail.
Referring to accompanying drawing, the ITO conductive layer 5, hole transmission layer 4, luminescent layer 3, electron transfer layer 2 and the metallic cathode 1 that the present invention includes glass substrate 6 and be successively set on glass substrate 6 upper surfaces from bottom to top, ITO conductive layer 5 links to each other with the positive and negative electrode of direct voltage respectively with metallic cathode 1, the upper and lower surface of metallic cathode 1 and electron transfer layer 2 is respectively arranged with the projection 7 of coincideing mutually, the upper surface of luminescent layer 3 is provided with the projection that the lower surface with electron transfer layer 2 matches equally, and the height of this projection 7 is the 20-40 nanometer, and spacing is the 150-300 micron.
The present invention is from the carrier balance implant angle, metallic cathode, electron transfer layer and luminescent layer interface shape have been carried out optimal design the projection of coincideing mutually promptly has been set, thereby improved effective injection area of electronics, coordinated the injection balance of electron hole, increase the recombination radiation probability of charge carrier greatly, made luminous efficiency, luminosity and the working life of OLED device significantly improve.
Claims (2)
1, a kind of electron injection type organic electroluminescent display component, the ITO conductive layer [5] that comprises glass substrate [6] and be successively set on glass substrate [6] upper surface from bottom to top, hole transmission layer [4], luminescent layer [3], electron transfer layer [2] and metallic cathode [1], it is characterized in that: the upper and lower surface of said metallic cathode [1] and electron transfer layer [2] is respectively arranged with the projection [7] of coincideing mutually, the upper surface of luminescent layer [3] is provided with the projection [7] that the lower surface with electron transfer layer [2] matches equally, and the height of this projection [7] is the 20-40 nanometer, and spacing is the 150-300 micron.
2, electron injection type organic electroluminescent display component according to claim 1 is characterized in that: said ITO conductive layer [5] links to each other with the positive and negative electrode of direct voltage respectively with metallic cathode [1].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100416258A CN100405632C (en) | 2006-01-10 | 2006-01-10 | Electron injection type organic electroluminescent display component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100416258A CN100405632C (en) | 2006-01-10 | 2006-01-10 | Electron injection type organic electroluminescent display component |
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| Publication Number | Publication Date |
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| CN1805170A true CN1805170A (en) | 2006-07-19 |
| CN100405632C CN100405632C (en) | 2008-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100416258A Expired - Fee Related CN100405632C (en) | 2006-01-10 | 2006-01-10 | Electron injection type organic electroluminescent display component |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222026A (en) * | 2008-01-23 | 2008-07-16 | 京东方科技集团股份有限公司 | Organic light emitting diode display device and manufacturing method thereof |
| CN103413896A (en) * | 2013-07-18 | 2013-11-27 | 陕西科技大学 | Two-side light exiting OLED device and manufacturing method thereof |
| CN108922979A (en) * | 2018-07-11 | 2018-11-30 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof, display device |
| CN109461822A (en) * | 2018-08-30 | 2019-03-12 | 云谷（固安）科技有限公司 | OLED device and preparation method thereof, display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0973983A (en) * | 1995-06-30 | 1997-03-18 | Seiko Precision Kk | El luminous device |
| JP4352474B2 (en) * | 1998-07-23 | 2009-10-28 | 凸版印刷株式会社 | Method for manufacturing organic electroluminescence display element |
| JP2003257662A (en) * | 2002-03-04 | 2003-09-12 | Sanyo Electric Co Ltd | Electroluminescence display device and its manufacturing method |
| CN2881968Y (en) * | 2006-01-10 | 2007-03-21 | 陕西科技大学 | Electronic filling type organic electroluminescent display device |
-
2006
- 2006-01-10 CN CNB2006100416258A patent/CN100405632C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101222026A (en) * | 2008-01-23 | 2008-07-16 | 京东方科技集团股份有限公司 | Organic light emitting diode display device and manufacturing method thereof |
| CN101222026B (en) * | 2008-01-23 | 2016-06-01 | 京东方科技集团股份有限公司 | Organic LED display device and manufacture method thereof |
| CN103413896A (en) * | 2013-07-18 | 2013-11-27 | 陕西科技大学 | Two-side light exiting OLED device and manufacturing method thereof |
| CN103413896B (en) * | 2013-07-18 | 2016-04-06 | 陕西科技大学 | OLED of a kind of two-sided bright dipping and preparation method thereof |
| CN108922979A (en) * | 2018-07-11 | 2018-11-30 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof, display device |
| CN109461822A (en) * | 2018-08-30 | 2019-03-12 | 云谷（固安）科技有限公司 | OLED device and preparation method thereof, display device |
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| Publication number | Publication date |
|---|---|
| CN100405632C (en) | 2008-07-23 |
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Granted publication date: 20080723 Termination date: 20110110 |