CN2481110Y - Film electroluminescent device - Google Patents
Film electroluminescent device Download PDFInfo
- Publication number
- CN2481110Y CN2481110Y CN 01226553 CN01226553U CN2481110Y CN 2481110 Y CN2481110 Y CN 2481110Y CN 01226553 CN01226553 CN 01226553 CN 01226553 U CN01226553 U CN 01226553U CN 2481110 Y CN2481110 Y CN 2481110Y
- Authority
- CN
- China
- Prior art keywords
- layer
- film electroluminescent
- electroluminescent device
- thin
- luminescent layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Electroluminescent Light Sources (AREA)
Abstract
A film electroluminescent device consists of an insulation layer 5, an illuminant layer 4, a medium layer 7, an illuminant layer 3, an insulation layer 2 and a back electrode 1 which are plated on a transparent conduction base 6. A layer of medium is arranged inside the illuminant layer of the structure of traditional double insulation layer film electroluminescent device. The arrangement of the medium layer can effectively reduce the threshold voltage of the device, meanwhile the transfer charge is increased, interface state is increased, and the electron concentration is improved, and the electric field can be redistributed, and the electron can be effectively accelerated, so the light luminance (visible range) of the device can be effectively improved, thereby providing conditions for the achievement of film electroluminescent colorization.
Description
The utility model relates to a kind of plural layers electroluminescent opto-electronic device, is mainly used in the blue membrane electroluminescent that produces higher brightness.
Development along with information technology, flat panel display is the only way of contemporary electronic display technology development, and electroluminescent is one of major technique in the flat panel display, has unique advantage, such as: active illuminating, total solidsization, reaction are soon, the visual angle is wide, definition is high.The electroluminescent of monochromatic (orange, green) shows the history in 20 years.1974～nineteen eighty-three 10 in the period of, the annual sales amount average growth rate of electronic console is 8.6%, the annual sales amount average growth rate of electroluminescent flat-panel monitor is then up to 63.75%.About electroluminescence display device, its device architecture the earliest is the thin-film electroluminescent device by the double sandwich structure of the quick husband's invention of Japanese pig mouth.It mainly is to be made up of insulating barrier, luminescent layer, insulating barrier, aluminium electrode successively on the glass substrate of band conductive layer.Numerous effort under this framework concentrate on selection matrix and impurity and improve on the crystalline state of blue light material.The material that research is used concentrates on mainly that strontium sulfide is mixed cerium (SrS:Ce), sulphur gallium strontium is mixed cerium (SrGa
2S
4: Ce), strontium sulfide mixes copper (SrS:Cu) etc.; In the technical process of film preparation, people have attempted mending the method for sulphur; Tradition method for annealing and quick heat treatment method improve the indexs such as luminosity of device, but, collect first electronics source, electronics acceleration and these three processes of collision excitation luminescence center in the double sandwich structure in the difficulty of one deck, make these effort can not obtain the high brightness membrane electro luminescent device effectively, the brightness of especially blue look membrane electro luminescent device also can't realize the colored needed minimum requirements that shows.
The purpose of this utility model is, a kind of new construction of thin-film electroluminescent device is provided, make the energy gap increase of material make device send blue light, first electronics source, electronics acceleration and these three processes of collision excitation luminescence center have been avoided collecting in the double sandwich structure again in the difficulty of one deck, these bottleneck processes in the electroluminescent are effectively expanded, obtain the membrane electro luminescent device (visible light, especially blue field photoluminescence) of better performance.
The utility model is to have on the transparent substrates of conductive layer, be coated with a kind of multi-layer film structure device that insulating barrier, luminescent layer, dielectric layer, luminescent layer, insulating barrier and back electrode are formed successively, be primarily characterized in that: added one deck very thin dielectric layer of thickness between one of percentage of luminescent layer gross thickness (4000-8000 ) is to 1/10th in the middle of the luminescent layer, i.e. design one dielectric layer in the luminescent layer of the thin-film electroluminescent device of double sandwich structure, a kind of membrane electro luminescent device of making.
The utility model is compared the beneficial effect that is had with background technology, because the adding of dielectric layer can effectively reduce the threshold voltage of device, conduct charges is increased, increase interfacial state, improve electron concentration, and can make electric field redistribution, more effective accelerated electron, cause the luminosity (visual field) of device to be able to effective raising, electroluminescent device of the present utility model can improve 5 to 6 times at least than the luminosity of conventional interlayer structure devices.For the realization of thin-film electroluminescent colorize creates conditions.
The structural representation of Fig. 1 thin-film electroluminescent device.
Below in conjunction with accompanying drawing this new practical thin-film electroluminescent device is further described.The utility model is a kind of thin-film electroluminescent device of sandwich construction.It is to plate insulating barrier 5, luminescent layer 4, dielectric layer 7, luminescent layer 3, insulating barrier 2 and back electrode 1 successively to constitute on the transparent substrates 6 that has conductive layer.Present embodiment is to plate SiO successively having on the transparent conducting glass substrate 6 of conductive layer
2(400nm)/ZnS:Tm (200nm)/SiO
2(5nm)/ZnS:Tm (200nm)/SiO
2(400nm), adopt thermal evaporation to steam the plated aluminum electrode at last; Above Biao Shu structure: plate insulating barrier 5 on the transparent conducting glass substrate 6 of conductive layer successively and be SiO having
2, thickness 400nm; Luminescent layer 4 is ZnS:Tm, thickness 200nm; Dielectric layer 7 is SiO
2, thickness 5nm; Luminescent layer 3 is ZnS:Tm, thickness 200nm; Insulating barrier 2 is SiO
2, thickness 400nm; Adopt thermal evaporation to steam the plated aluminum electrode at last.
The thickness of dielectric layer 7 of the present utility model be one of the percentage of (4000-8000 ) of luminescent layer (4 and 3) gross thickness between 1/10th, the dielectric layer material can be yttria (Y
2O
3), hafnium oxide (HfO
2), silica (SiO
2), aluminium oxide (Al
2O
3), silicon nitride Si
3N
4, tantalum pentoxide Ta
2O
5And ferroelectric material lead titanates PbTiO
3With barium titanate BaTiO
3Deng.
Different insulating barriers both can adopt same material, also available different materials.The material that insulating barrier can be used: SiO
2, Al
2O
3Si
3N
4, SiON, Ta
2O
5, PbTiO
3, BaTiO
3
Luminescent layer also can adopt identical or different material.The luminescent layer material can be: ZnS:Cu, ZnS:Tb, ZnS:Mn, SrS:Cu, SrS:Ce, SrGa
2S
4: Ce
Claims (2)
1. a thin-film electroluminescent device is made of the insulating barrier (5), luminescent layer, insulating barrier (2) and the back electrode (1) that are plated in successively on the electrically conducting transparent substrate (6); It is characterized in that: in the middle of the luminescent layer (3,4) of double insulation layer thin film electroluminescent device structure, add a dielectric layer (7).
2. thin-film electroluminescent device according to claim 1 is characterized in that: the thickness of the dielectric layer that is added (7) is between one of percentage of luminescent layer (3 and 4) gross thickness is to 1/10th.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01226553 CN2481110Y (en) | 2001-06-07 | 2001-06-07 | Film electroluminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01226553 CN2481110Y (en) | 2001-06-07 | 2001-06-07 | Film electroluminescent device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2481110Y true CN2481110Y (en) | 2002-03-06 |
Family
ID=33642167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01226553 Expired - Fee Related CN2481110Y (en) | 2001-06-07 | 2001-06-07 | Film electroluminescent device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2481110Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606495A (en) * | 2017-08-31 | 2018-01-19 | 张俭 | Electric capacity electroluminescent cold light source and preparation method thereof |
| CN114340073A (en) * | 2021-12-30 | 2022-04-12 | 湖南鼎一致远科技发展有限公司 | Double-sided light-emitting electroluminescent film, preparation method and electroluminescent signboard |
-
2001
- 2001-06-07 CN CN 01226553 patent/CN2481110Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606495A (en) * | 2017-08-31 | 2018-01-19 | 张俭 | Electric capacity electroluminescent cold light source and preparation method thereof |
| CN114340073A (en) * | 2021-12-30 | 2022-04-12 | 湖南鼎一致远科技发展有限公司 | Double-sided light-emitting electroluminescent film, preparation method and electroluminescent signboard |
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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 |