CN2337679Y - Organic thin membrance electroluminescent element - Google Patents
Organic thin membrance electroluminescent element Download PDFInfo
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- CN2337679Y CN2337679Y CN98223872U CN98223872U CN2337679Y CN 2337679 Y CN2337679 Y CN 2337679Y CN 98223872 U CN98223872 U CN 98223872U CN 98223872 U CN98223872 U CN 98223872U CN 2337679 Y CN2337679 Y CN 2337679Y
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Abstract
The utility model relates to an organic film electroluminescent element. The utility model comprises a low work function layer and a high conducting layer which form a back electrode layer, and a base plate is successively covered upwards with a transparent conducting electrode layer, a back electrode leading-out electrode layer, a front insulating layer, an organic hole transmitting layer, an organic electron transmitting layer, and a rear insulating layer in a sealed casing which is composed of a sealing cover and the base plate to form the back electrode layer. The outer periphery of the joint of the sealing cover and the base plate is provided with a sealing adhesive layer with desiccant. The space in the sealed casing contains inert gas or vacuum. The utility model has the advantages of high luminescent efficiency, high stability, and long service life. The utility model is especially suitable for the liquid crystal back lighting, or directly being used for the display of various screens, such as TV sets, computers, etc.
Description
The utility model is a kind of organic thin film electroluminescent elements.Be applicable to various electric equipments, the indicator light of power supply, symbol and character show, night weak illumination, and various screen displays etc., the demonstration of particularly suitable computer and microcomputer screen.
Prior art:
1.C.W.Tang Deng the people (referring to Appl.Phys.Lett., 1987,51,913) a kind of organic thin film electroluminescent elements with high brightness and high efficiency sandwich construction is proposed, its basic structure is to accompany hole transmission layer 5 between transparency conductive electrode layer 2 and dorsum electrode layer 9, and (being generally the derivative of aniline) and one deck electron transfer layer 6 (are generally eight hydroxyl Kui quinoline aluminium Alq
3), wherein transparency conductive electrode layer 2 mostly is tin indium oxide (ITO), dorsum electrode layer 9 is the metal alloy such as the magnesium silver alloy of low work function, aluminium, calcium etc.Luminescent layer can unite two into one with electron transfer layer or hole transmission layer.Electronics is injected by back electrode 9 in this structure, and the hole is injected by transparency conductive electrode layer 2 (ITO), and is compound and luminous in luminescent layer.
2.J.H.Burroughes propose the multiple layer polymer organic thin film electroluminescent elements made with polymer Deng people (referring to Narnre, 1990,347,539).Its basic structure is to accompany one layer of polymeric (polyvinyl benzene PPV) layer (Pdypheylene vinylene) its transparency conductive electrode layer 2 to be generally tin indium oxide (ITO) between transparency conductive electrode layer 2 and dorsum electrode layer 9.9 of dorsum electrode layers are the calcium of low work function, and its principle also is that back of the body electroplax layer 9 injects electronics, by transparency conductive electrode layer 2 injected hole, thereby in polymeric layer recombination luminescence.
Above-mentioned element luminous efficiency is all quite high, but stability is still unsatisfactory, and its shelf stability and job stability are all relatively poor, and the life-span is shorter, must further improve.
The purpose of this utility model is the defective that overcomes light-emitting component in the above-mentioned prior art, proposes a kind of high luminous efficiency that both had, and can improve the stability of depositing and working of element simultaneously again, improves the organic thin film electroluminescent elements in its useful life.
Comprise in the organic thin film electroluminescent elements concrete structure of the present utility model in the seal casinghousing that constitutes by seal cover 10 and transparent substrate 1, on substrate 1, be transparency conductive electrode layer 2 on one side, another side is a back electrode extracting electrode layer 3, on transparency conductive electrode layer 2 and back electrode extracting electrode layer 3, front insulation layer 4 is arranged, it on front insulation layer 4 organic cavity transmission layer 5, topped organic electron transport layer 6 on organic cavity transmission layer 5, topped on organic electron transport layer 6 have a back insulating barrier 7.The dorsum electrode layer 11 that composite construction is arranged on the insulating barrier 7 of back.Dorsum electrode layer 11 is by direct topped low work function layer 8 and the composite construction that constitutes of topped high conductive layer 9 on low work function layer 8 on the insulating barrier 7 of back.
Above said front insulation layer 4 be by thickness d
4Inorganic or the organic insulator of the broad stopband of=0.1nm～100nm or semi-insulator constitute.Said back insulating barrier 7 also is by thickness d
7Inorganic or the organic insulator of the broad stopband of=0.1nm～100nm or semi-insulator constitute.Said inorganic insulator or semi-insulator are oxide or the fluoride of zinc Zn, aluminium Al, silicon Si, lithium Li, manganese Mn, yttrium Y, tantalum Ta.Organically insulator is a titanium phthalocyanine compound etc.
Above the dorsum electrode layer 11 of said composite construction, wherein directly topped low work function layer 8 on the insulating barrier 7 of back is by thickness d
8=2nm～200nm has low work function and a good stability, is difficult for that the acolite body of oxidation constitutes.Acolite is bismuth Bi, cadmium Cd, gallium Ga, indium In, manganese Mn, tin Sn, plumbous Pb, tantalum
Tb, silver-colored Ag etc. alloy.
In the dorsum electrode layer 11, topped high conductive layer 9 on low work function layer 8 is by thickness d
9The metal with high conduction performance and high reflectance of=50nm～200nm constitutes.This metal is gold or silver, or aluminium, copper etc.
Above-mentioned organic cavity transmission layer 5 is made of triphenylamine derivative (TPD or NPB).Organic electron transport layer 6 is by organic material eight hydroxyl Kui quinoline germanium body (Alq
3Or Znq
3) constitute.
Above-mentioned each rete all can adopt method preparations such as vacuum evaporation, high-frequency sputtering, whirl coating.
Advantage of the present utility model:
1. the utility model has front insulation layer 4 between transparency conductive electrode layer 2 and back electrode extracting electrode layer 3 and organic cavity transmission layer 5, and back insulating barrier 7 is arranged between organic electron transport layer 6 and dorsum electrode layer 11.In this structure with double hyer insulation layer, electronics or hole enter into organic layer by the bob mechanism of wearing, and so both can improve the injection ratio in electronics and hole, have just improved luminous efficiency, can improve the stability of element again, prolong the life-span of element.
2. dorsum electrode layer 11 of the present utility model is the composite constructions that are made of low work function layer 8 and high conductive layer 9.Low work function layer 8 can improve the injection ratio of electronics, and has a stable interface state, topped one deck has the high conductive layer 9 of high stable performance and high reflectance on low work function layer 8 again, it has suppressed the formation and development of stain greatly, and has slowed down the speed of driving voltage rising in use.Thereby, not only further improved luminous efficiency, improve stability, and prolonged the useful life of element greatly.
3. the utility model has double-layer seal glue- line 13,15 at the joint of seal cover 10 and substrate 1, more advantageously stoped the immersion of steam, more advantageously maintain the inert gas or the vacuum of 12 li of the interior space region of housing, thereby further ensured the stability that element is deposited and worked, more improved useful life.
Description of drawings: Fig. 1 is the structural representation of organic thin film electroluminescent elements of the present utility model.
Embodiment: structure as shown in Figure 1.
At first on through the substrate 1 (getting sheet glass) after cleaning, scribble transparency conducting layer, depict the transparency conductive electrode layer 2 and the back electrode extracting electrode layer 3 of element with the method for photoetching as substrate 1.Again after cleaning, with method evaporation one deck thickness d of vacuum evaporation
4The silicon monoxide of=2nm (SiO) layer is as front insulation layer 4.On front insulation layer 4, be coated with (thermal evaporation method) thickness d is arranged
5The organic cavity transmission layer 5 (TPD) of=70nm, topped one deck thickness d on organic cavity transmission layer 5 then
6Organic electron transport layer 6 (the Alq of=70nm
3), again at organic electron transport layer 6 (Alq
3) on topped (vacuum evaporation) one deck thickness d
7The lithium fluoride of=3nm (LiF) plates (thermal evaporation method) one deck thickness d as back insulating barrier 7 on the insulating barrier 7 of back
8The low work function layer 8 (low melting point alloy) of=20nm, topped one deck thickness d on low work function layer 8
9=200nm silver (Ag) layer is as high conductive layer 9, and the glass that seal cover 10 usefulness are transparent in argon gas atmosphere, seals seal cover 10 and glass substrate 1, seals with the sealant layer 13 of silica gel as drier 14 around the sealed engagement place.Be argon gas in the space region 12 in the shell.Through test, the element work of said structure had only stain seldom after 2000 hours, and the trend that voltage rises is also much smaller than the element of prior art.Prolonged useful life widely.
Claims (9)
1. organic thin film electroluminescent elements, concrete structure comprises:
1. in the seal casinghousing that seal cover (10) and substrate (1) constitute, Yi Bian upward transparency conductive electrode layer (2) is arranged, another side has back electrode extracting electrode layer (3) at substrate (1);
2. topped organic cavity transmission layer (5) and organic electron transport layer (6) on transparency conductive electrode layer (2) and back electrode extracting electrode layer (3);
Dorsum electrode layer (11) is 3. arranged on organic electron transport layer (6);
It is characterized in that:
4. between transparency conductive electrode layer (2) and back electrode extracting electrode layer (3) and organic cavity transmission layer (5), front insulation layer (4) is arranged;
5. between organic electron transport layer (6) and dorsum electrode layer (11), back insulating barrier (7) is arranged;
6. dorsum electrode layer (11) be by directly topped on back insulating barrier (7) low work function layer (8) and the composite construction of topped high conductive layer (9) formation on low work function layer (8);
7. the joint at seal cover (10) and substrate (1) has sealant layer (15), is equipped with the sealant layer (13) that contains drier (14) around joint, and district (12) has living space in the seal casinghousing.
2. according to the electroluminescent cell of claim 1, it is characterized in that front insulation layer (4) is by thickness d
4The insulator of the inorganic or organic broad stopband of=0.1nm～100nm or semi-insulator constitute.
3. according to the electroluminescent cell of claim 1, it is characterized in that back insulating barrier (7) is by thickness d
7Inorganic or the organic broad stopband insulator of=0.1nm～100nm or semi-insulator constitute.
4. according to the electroluminescent cell of claim 2 or 3, the inorganic insulator or the semi-insulator that it is characterized in that constituting the broad stopband of front insulation layer (4) or back insulating barrier (7) are oxide or the fluoride of zinc Zn, aluminium Al, silicon Si, lithium Li, manganese Mn, yttrium Y, tantalum Ta; Organically insulator is a titanium phthalocyanine compound.
5. according to the electroluminescent cell of claim 1, the low work function layer (8) that it is characterized in that constituting dorsum electrode layer (11) is by thickness d
8The stable acolite body that is difficult for oxidation with low work function of=2nm～200nm constitutes.
6. according to the electroluminescent cell of claim 1, its characteristic is that constituting the high conductive layer (9) of carrying on the back electroplax layer (11) is by thickness d
9The metal that high reflectance is arranged with high conduction performance of=50nm～200nm constitutes.
7. according to the electroluminescent cell of claim 5, the acolite that it is characterized in that constituting low work function layer (8) is the alloy of bismuth Bi, cadmium Cd, gallium Ga, indium In, manganese Mn, tin Sn, plumbous Pb, tantalum Tb, silver-colored Ag.
8. according to the electroluminescent cell of claim 6, the metal that it is characterized in that constituting high conductive layer (9) is a gold, or silver or aluminium.
9. according to the electroluminescent cell of claim 1, it is characterized in that space region (12) lining in the seal casinghousing is an inert gas, or vacuum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98223872U CN2337679Y (en) | 1998-04-29 | 1998-04-29 | Organic thin membrance electroluminescent element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98223872U CN2337679Y (en) | 1998-04-29 | 1998-04-29 | Organic thin membrance electroluminescent element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2337679Y true CN2337679Y (en) | 1999-09-08 |
Family
ID=33974866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98223872U Expired - Fee Related CN2337679Y (en) | 1998-04-29 | 1998-04-29 | Organic thin membrance electroluminescent element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2337679Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324773C (en) * | 2003-04-24 | 2007-07-04 | 三洋电机株式会社 | Semiconductor laser device |
| WO2012068744A1 (en) * | 2010-11-26 | 2012-05-31 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and fabrication method thereof |
| CN107039497A (en) * | 2017-04-06 | 2017-08-11 | 安徽熙泰智能科技有限公司 | A kind of AMOLED display device |
-
1998
- 1998-04-29 CN CN98223872U patent/CN2337679Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324773C (en) * | 2003-04-24 | 2007-07-04 | 三洋电机株式会社 | Semiconductor laser device |
| WO2012068744A1 (en) * | 2010-11-26 | 2012-05-31 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and fabrication method thereof |
| CN103180994A (en) * | 2010-11-26 | 2013-06-26 | 海洋王照明科技股份有限公司 | Organic electroluminescent device and fabrication method thereof |
| CN107039497A (en) * | 2017-04-06 | 2017-08-11 | 安徽熙泰智能科技有限公司 | A kind of AMOLED display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |