JPH0634391B2 - Electroluminescent device - Google Patents
Electroluminescent deviceInfo
- Publication number
- JPH0634391B2 JPH0634391B2 JP60129692A JP12969285A JPH0634391B2 JP H0634391 B2 JPH0634391 B2 JP H0634391B2 JP 60129692 A JP60129692 A JP 60129692A JP 12969285 A JP12969285 A JP 12969285A JP H0634391 B2 JPH0634391 B2 JP H0634391B2
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting layer
- conductive
- electrode
- substrate
- 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
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 239000011800 void material Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 3
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 239000005083 Zinc sulfide Substances 0.000 description 2
- UFNRFBFHJJPDNF-UHFFFAOYSA-N [Zn].[Ce] Chemical compound [Zn].[Ce] UFNRFBFHJJPDNF-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229910052984 zinc sulfide Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、例えば発光素子やパネルディスプレイなどに
用いられるエレクロトミネッセンス素子（ＥＬ素子）に
関する。TECHNICAL FIELD The present invention relates to an electroluminescence element (EL element) used for, for example, a light emitting element or a panel display.
従来、エレクトロルミネッセンス素子（ＥＬ素子）は、
第３図に示すようにガラス板１に透明電極（ITO)２が形
成された基板３上に亜鉛−セリウム：マンガン（ZnSe：
Mn）発光層４を形成し、この発光層４上にアルミニウム
（Al）電極５をAlの蒸着により形成したものである。Conventionally, electroluminescent elements (EL elements) are
As shown in FIG. 3, zinc-cerium: manganese (ZnSe :) is formed on a substrate 3 having a transparent electrode (ITO) 2 formed on a glass plate 1.
The Mn) light emitting layer 4 is formed, and the aluminum (Al) electrode 5 is formed on the light emitting layer 4 by vapor deposition of Al.
しかしながら、発光層４には、亜鉛−セリウム（ZnSe）
結晶成長時のピンホールや結晶粒界による例えば直径が
０．１μｍ以下の微細な空隙部６を生じており、この空
隙部６に蒸着されたAl微粒子が拡散し、両電極２，５間
を短絡させることになり、発光不良の原因となってい
る。However, the light emitting layer 4 contains zinc-cerium (ZnSe).
A fine void 6 having a diameter of, for example, 0.1 μm or less is generated due to a pinhole or a crystal grain boundary during crystal growth, and Al fine particles vapor-deposited in the void 6 are diffused to form a space between the electrodes 2 and 5. This causes a short circuit, which causes defective light emission.
本発明は、上述の問題に鑑み、発光層上に形成される導
電塗料の導電性物質が発光層の空隙部に拡散することを
防止するエレクトロルミネッセンス素子を提供すること
を目的とする。In view of the above problems, it is an object of the present invention to provide an electroluminescent element that prevents a conductive substance of a conductive coating material formed on a light emitting layer from diffusing into a void portion of the light emitting layer.
本発明のエレクトロルミネッセンス素子は、基板上に形
成された発光層上に、この発光層の空隙部より径大の導
電性物質を有する導電塗料よりなる塗膜電極を形成した
ものである。The electroluminescent element of the present invention comprises a light emitting layer formed on a substrate, and a coating electrode made of a conductive coating material having a conductive substance having a diameter larger than the void portion of the light emitting layer.
本発明のエレクトロルミネッセンス素子は、基板上に形
成された発光層上に、発光層中に生じた空隙部よりも径
大の導電性物質を有する導電塗膜を形成して塗膜電極を
形成したため、空隙部への導電性物質の介入による短絡
を防止する。The electroluminescent element of the present invention, on the light emitting layer formed on the substrate, for forming a coating film electrode by forming a conductive coating film having a conductive substance having a diameter larger than the void portion generated in the light emitting layer , Prevents short circuit due to the intervention of conductive material in the void.
以下、本発明のエレクトロルミネッセンス素子の一実施
例を図面を参照して説明する。An embodiment of the electroluminescent element of the present invention will be described below with reference to the drawings.
１はガラス板で、表面に透明電極（ITO)２が形成されて
基板３を構成している。なお、基板３としては、ガラス
板１とITO 電極２との代りに、ガリウム−ヒ素（GaAs）
基板を用いる場合もある。A glass plate 1 has a transparent electrode (ITO) 2 formed on its surface to form a substrate 3. As the substrate 3, gallium-arsenic (GaAs) is used instead of the glass plate 1 and the ITO electrode 2.
A substrate may be used in some cases.
また、ITO 電極２上には眞空蒸着法分子線エピタキシャ
ル法などにより、ZnSeまたは硫化亜鉛（ZnS）などの半
導体層中に、発光中心となる活性物質のマンガン（Mn）
をドープした発光層４が形成されている。Further, on the ITO electrode 2, by a vacuum evaporation method, a molecular beam epitaxy method, or the like, in a semiconductor layer such as ZnSe or zinc sulfide (ZnS), manganese (Mn), which is an active substance serving as an emission center, is formed.
A light emitting layer 4 doped with is formed.
そして、この発光層４には、成長時に生じたピンホール
や結晶粒界による 0.1μｍφ以下の空隙部６が介在して
いる。The light emitting layer 4 has a void 6 of 0.1 μmφ or less due to a pinhole or a crystal grain boundary generated during growth.
さらに、発光層４上には、導電塗料が印刷またはスプレ
ーによって塗布されて塗膜電極７が形成される。そし
て、この導電塗料は、例えば合成樹脂塗料中に粒径 0.5
〜 0.1μｍφの銅（Cu）など導電粒子が分散されて調整
されている。Further, a conductive coating material is applied on the light emitting layer 4 by printing or spraying to form a coating electrode 7. This conductive paint has a particle size of 0.5 in synthetic resin paint, for example.
Conductive particles such as copper (Cu) having a diameter of 0.1 μm are dispersed and adjusted.
なお、塗膜電極７上には、第２図に示すように、アルミ
ニウム（Al）電極８をさらに蒸着形成する場合もある。An aluminum (Al) electrode 8 may be further vapor-deposited and formed on the coating film electrode 7, as shown in FIG.
次に、上記実施例の作用を説明する。Next, the operation of the above embodiment will be described.
電極２，７間または電極２，８間に電界を印加すること
により発光層４が発光する。The light emitting layer 4 emits light by applying an electric field between the electrodes 2 and 7 or between the electrodes 2 and 8.
そして、この発光層４の発光の際、発光層４に介在され
るピンホールや結晶粒界の空隙部６は、塗膜電極７中に
含まれる導電性粒子よりも径小であるから、この空隙部
６に導電性粒子が介入することがなく、短絡が防止で
き、発光効率を向上できる。When the light emitting layer 4 emits light, the pinholes and the voids 6 of the crystal grain boundaries interposed in the light emitting layer 4 are smaller in diameter than the conductive particles contained in the coating electrode 7. The conductive particles do not intervene in the void portion 6, a short circuit can be prevented, and the luminous efficiency can be improved.
本発明によれば、基板上に形成された発光層上に、発光
層中に生じた空隙部よりも径大の導電性物質を有する導
電塗膜を形成して塗膜電極を形成したため、空隙部への
導電性物質の介入による短絡を防止でき、発光効率を向
上できる。According to the present invention, on the light emitting layer formed on the substrate, a conductive coating film having a conductive material having a diameter larger than that of the void portion formed in the light emitting layer is formed to form the coating electrode, and thus the void is formed. It is possible to prevent a short circuit due to the intervention of a conductive substance into the portion, and improve the luminous efficiency.
第１図、第２図は本発明の夫々異る実施例を示すＥＬ素
子の断面図、第３図は従来のＥＬ素子の断面図である。 １……基板、４……発光層、７……塗膜電極。1 and 2 are cross-sectional views of EL elements showing different embodiments of the present invention, and FIG. 3 is a cross-sectional view of a conventional EL element. 1 ... Substrate, 4 ... Light emitting layer, 7 ... Coating electrode.
Claims (1)
層の空隙部より径大の導電性物質からなる導電塗料の塗
膜電極を形成した ことを特徴とするエレクトロルミネッセンス素子。1. An electroluminescent device comprising: a light emitting layer formed on a substrate; and a coating film electrode of a conductive coating material made of a conductive material having a diameter larger than that of a void portion of the light emitting layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60129692A JPH0634391B2 (en) | 1985-06-14 | 1985-06-14 | Electroluminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60129692A JPH0634391B2 (en) | 1985-06-14 | 1985-06-14 | Electroluminescent device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61288395A JPS61288395A (en) | 1986-12-18 |
| JPH0634391B2 true JPH0634391B2 (en) | 1994-05-02 |
Family
ID=15015829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60129692A Expired - Fee Related JPH0634391B2 (en) | 1985-06-14 | 1985-06-14 | Electroluminescent device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634391B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0438699U (en) * | 1990-07-30 | 1992-03-31 | ||
| JP5311323B2 (en) * | 2007-07-25 | 2013-10-09 | 株式会社ジャパンディスプレイ | Organic EL display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59201392A (en) * | 1983-04-28 | 1984-11-14 | アルプス電気株式会社 | Dispersion electroluminescence |
-
1985
- 1985-06-14 JP JP60129692A patent/JPH0634391B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61288395A (en) | 1986-12-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |