JP3101300B2 - Organic electroluminescent device - Google Patents
Organic electroluminescent deviceInfo
- Publication number
- JP3101300B2 JP3101300B2 JP02185645A JP18564590A JP3101300B2 JP 3101300 B2 JP3101300 B2 JP 3101300B2 JP 02185645 A JP02185645 A JP 02185645A JP 18564590 A JP18564590 A JP 18564590A JP 3101300 B2 JP3101300 B2 JP 3101300B2
- Authority
- JP
- Japan
- Prior art keywords
- organic
- layer
- electroluminescent device
- thin film
- electrode 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
- 239000010410 layer Substances 0.000 claims description 56
- 239000011241 protective layer Substances 0.000 claims description 21
- 239000010409 thin film Substances 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 8
- 238000005401 electroluminescence Methods 0.000 claims description 5
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 4
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005566 electron beam evaporation Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000012044 organic layer Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 229920003319 Araldite® Polymers 0.000 description 1
- 229910000846 In alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 150000004668 long chain fatty acids Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000005394 sealing glass Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- -1 tris (8-quinolinol) aluminum Chemical compound 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
- Luminescent Compositions (AREA)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は有機物質の電界発光（エレクトロ・ルミネッ
スセンス:EL）現象を利用した有機電界発光素子に関す
る。The present invention relates to an organic electroluminescent device utilizing the electroluminescence (EL) phenomenon of an organic substance.
（ロ）従来の技術 電界発光素子のひとつとして、有機電界発光素子が知
られ、この有機電界発光素子が、特開昭63−264692号公
報に開示されている。(B) Conventional technology As one of the electroluminescent devices, an organic electroluminescent device is known, and this organic electroluminescent device is disclosed in Japanese Patent Application Laid-Open No. 63-264692.
斯る有機電界発光素子は、陽極が形成されたガラス基
板上に有機質ホール注入輸送層及び有機質電子注入輸送
層を順次形成し、更にこの有機質電子注入輸送層上に陰
極を形成して作られる。そして、有機電界発光素子の両
電極間に10〜20V程度の電圧を印加すると、有機質電子
注入輸送層中の電子が、有機質ホール注入輸送層と有機
質電子注入輸送層との界面付近で、有機質ホール注入輸
送層中のホールと再結合することによって、発光する。Such an organic electroluminescent device is manufactured by sequentially forming an organic hole injecting and transporting layer and an organic electron injecting and transporting layer on a glass substrate on which an anode is formed, and further forming a cathode on the organic electron injecting and transporting layer. When a voltage of about 10 to 20 V is applied between both electrodes of the organic electroluminescent element, electrons in the organic electron injecting and transporting layer cause an organic hole in the vicinity of the interface between the organic hole injecting and transporting layer and the organic electron injecting and transporting layer. Light is emitted by recombination with holes in the injection transport layer.
ところで、この有機電界発光素子を使用していると、
空気中の湿気や酸素が素子中の有機薄膜層、及び電極層
まで侵入してきて、これらの層間同士が剥離するため
に、素子寿命が短くなってしまう。By the way, when using this organic electroluminescent device,
Moisture and oxygen in the air penetrate into the organic thin film layer and the electrode layer in the device, and these layers are separated from each other, so that the life of the device is shortened.
この欠点を解消するために、無機ELでは、前記素子表
面をアラルダイト等の樹脂、シールガラス、或るいはシ
リコンオイルの保護層で覆っているが、有機ELでは、こ
れらの方法を用いることが困難である。In order to solve this drawback, in the case of inorganic EL, the element surface is covered with a resin such as araldite, sealing glass, or a protective layer of silicon oil, but it is difficult to use these methods in organic EL. It is.
これは、保護層の成分が素子中の有機層及び電極層に
侵入して、これらの層を浸食してしまうことによる。This is because the components of the protective layer penetrate into the organic layer and the electrode layer in the device and erode these layers.
（ハ）発明が解決しようとする課題 本発明は、前記の問題に鑑み成されたもので、有機電
界発光素子中の有機層及び電極層が、素子表面に形成さ
れた保護層によって浸食されないような新規な保護層を
有する有機電界発光素子を提供することを目的とする。(C) Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned problems, and is intended to prevent an organic layer and an electrode layer in an organic electroluminescent element from being eroded by a protective layer formed on the element surface. It is an object of the present invention to provide an organic electroluminescent device having a novel protective layer.
（ニ）課題を解決するための手段 本発明は、基板上に形成された一方の電極層と、この
電極層上に形成された有機薄膜層と、この有機薄膜層上
に形成された他方の電極層と、からなる有機電界発光素
子において、前記他方の電極層と前記有機薄膜層との少
なくとも露出表面を覆う保護層を窒化アルミニウムから
なる保護層としたことを特徴とする。(D) Means for Solving the Problems The present invention provides one electrode layer formed on a substrate, an organic thin film layer formed on this electrode layer, and another electrode layer formed on this organic thin film layer. An organic electroluminescent device comprising an electrode layer, wherein a protective layer covering at least an exposed surface of the other electrode layer and the organic thin film layer is a protective layer made of aluminum nitride.
（ホ）作用 本発明は、基板上に形成された一方の電極層と、この
電極層上に形成された有機薄膜層と、この有機薄膜層上
に形成された他方の電極層と、からなる有機電界発光素
子において、前記他方の電極層と前記有機薄膜層との少
なくとも露出表面を覆う保護層を窒化アルミニウムから
なる保護層としている。(E) Function The present invention comprises one electrode layer formed on a substrate, an organic thin film layer formed on this electrode layer, and another electrode layer formed on this organic thin film layer. In the organic electroluminescent device, a protective layer covering at least an exposed surface of the other electrode layer and the organic thin film layer is a protective layer made of aluminum nitride.
従って、その保護層は、湿気を含まない保護層である
ので、前記他方の電極層、前記有機薄膜層内にその湿気
等が侵入せず、それらに悪影響を及ぼすことがない。Therefore, since the protective layer is a protective layer that does not contain moisture, the moisture and the like do not enter the other electrode layer and the organic thin film layer and do not adversely affect them.
（ヘ）実施例 本発明の有機電界発光素子の断面図を第１図に示す。(F) Example A cross-sectional view of the organic electroluminescent device of the present invention is shown in FIG.
１は透明なガラス基板、２はインジウム、錫酸化物等
からなる陽極、３は層厚が100〜150Åのポリ（Ｎ−ビニ
ルカルバゾール）からなる有機質ホール注入輸送層、４
は層厚が1000Å程度のトリス（８−キノリノール）アル
ミニウムからなる有機質電子注入輸送層、５は層厚が10
00〜2000Åで、電子ビーム蒸着法によって形成されるマ
グネシウム、インジウム合金等からなる陰極、６は層厚
が１μｍ程度のポリイミドからなる保護層である。この
保護層６の他の材料として、絶縁性の良い、ポリブタジ
エン、テフロン、若しくはポリスチレン等の有機高分子
や炭化水素、長鎖脂肪酸等の有機蒸着膜、酸化イットリ
ウム（Y2O3）、酸化アルミニウム（Al2O3）、窒化アル
ミニウム（AlN）、酸化シリコン（SiO2）、窒化シリコ
ン（Si3N4）等の無機蒸着膜が挙げられる。1 is a transparent glass substrate, 2 is an anode made of indium, tin oxide or the like, 3 is an organic hole injecting and transporting layer made of poly (N-vinylcarbazole) having a thickness of 100 to 150 °, 4
Is an organic electron injecting and transporting layer made of tris (8-quinolinol) aluminum having a layer thickness of about
A cathode made of magnesium, an indium alloy, or the like, formed by electron beam evaporation at a temperature of 00 to 2000 °, and 6 is a protective layer made of polyimide having a layer thickness of about 1 μm. Other materials for the protective layer 6 include organic insulating polymers having good insulating properties, such as organic polymers such as polybutadiene, Teflon, or polystyrene, organic vapor-deposited films such as hydrocarbons and long-chain fatty acids, yttrium oxide (Y 2 O 3 ), and aluminum oxide. (Al 2 O 3 ), aluminum nitride (AlN), silicon oxide (SiO 2 ), and silicon nitride (Si 3 N 4 ).
本発明の有機電界発光素子は、後述の如き方法により
形成される。The organic electroluminescent device of the present invention is formed by a method described below.
即ち、ガラス基板１上に陽極２を蒸着法によって形成
し、この上に有機質ホール注入輸送層３、有機質電子注
入輸送層４を順次蒸着によって形成し、更に有機質電子
注入輸送層４上に陰極５を電子ビーム蒸着法によって形
成し、その後、少なくとも陰極５、有機質ホール注入輸
送層３、及び有機質電子注入輸送層４の露出部分を覆う
べく、保護層６を蒸着法によって形成する。That is, an anode 2 is formed on a glass substrate 1 by a vapor deposition method, an organic hole injection / transport layer 3 and an organic electron injection / transport layer 4 are sequentially formed thereon by vapor deposition, and a cathode 5 is formed on the organic electron injection / transport layer 4. Is formed by an electron beam evaporation method, and then a protective layer 6 is formed by an evaporation method so as to cover at least the exposed portions of the cathode 5, the organic hole injection / transport layer 3, and the organic electron injection / transport layer 4.
有機電界発光素子に前記の如き物質からなる保護層６
を蒸着法で形成することによって、保護層を設けないと
きに比べ、素子寿命を２倍以上に延ばすことができた。Protective layer 6 made of the above-mentioned substance in an organic electroluminescent device
Was formed by vapor deposition, the device life could be extended more than twice as compared with the case where no protective layer was provided.
以上は、蒸着法による形成方法を述べたが、スパッタ
リング法による形成方法で行っても良い。In the above, the formation method by the vapor deposition method is described, but the formation method by the sputtering method may be used.
（ト）発明の効果 本発明は、基板上に形成された一方の電極層と、この
電極層上に形成された有機薄膜層と、この有機薄膜層上
に形成された他方の電極層と、からなる有機電界発光素
子において、前記他方の電極層と前記有機薄膜層との少
なくとも露出表面を覆う保護層を窒化アルミニウムから
なる保護層としているので、外気からの侵食を防止する
他、保護層が素子中の有機薄膜層を侵食する恐れもな
く、素子寿命を延ばすことができる。(G) Effect of the Invention The present invention provides one electrode layer formed on a substrate, an organic thin film layer formed on this electrode layer, and another electrode layer formed on this organic thin film layer. In the organic electroluminescent device comprising, since the protective layer covering at least the exposed surface of the other electrode layer and the organic thin film layer is a protective layer made of aluminum nitride, in addition to preventing erosion from the outside air, the protective layer is The lifetime of the device can be extended without fear of eroding the organic thin film layer in the device.
第１図は本発明の有機電界発光素子の模式的断面図を示
す。 １……ガラス基板、２……陽極、３……有機質ホール注
入輸送層、４……有機質電子注入輸送層、５……陰極、
６……保護層。FIG. 1 is a schematic sectional view of the organic electroluminescent device of the present invention. DESCRIPTION OF SYMBOLS 1 ... Glass substrate, 2 ... Anode, 3 ... Organic hole injection / transport layer, 4 ... Organic electron injection / transport layer, 5 ... Cathode,
6 ... Protective layer.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 柴田 賢一 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (72)発明者 辻野 嘉一 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (72)発明者 黒木 和彦 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (56)参考文献 特開 平１−243393（ＪＰ，Ａ) 特開 昭64−43994（ＪＰ，Ａ) 特開 平１−313892（ＪＰ，Ａ) 特開 平４−212284（ＪＰ，Ａ) 特開 平１−243393（ＪＰ，Ａ) 特開 昭61−279096（ＪＰ，Ａ) ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kenichi Shibata 2--18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kaichi Tsujino 2--18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Kazuhiko Kuroki 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-1-243393 (JP, A) JP-A-64 JP-A-43994 (JP, A) JP-A-1-313892 (JP, A) JP-A-4-212284 (JP, A) JP-A-1-243393 (JP, A) JP-A-61-279096 (JP, A) )
Claims (1)
電極層上に形成された有機薄膜層と、この有機薄膜層上
に形成された他方の電極層と、からなる有機電界発光素
子において、 前記他方の電極層と前記有機薄膜層との少なくとも露出
表面を覆う保護層を窒化アルミニウムからなる保護層と
したことを特徴とする有機電界発光素子。An organic electroluminescence comprising one electrode layer formed on a substrate, an organic thin film layer formed on the electrode layer, and another electrode layer formed on the organic thin film layer. The organic electroluminescent device according to claim 1, wherein a protective layer covering at least an exposed surface of the other electrode layer and the organic thin film layer is a protective layer made of aluminum nitride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02185645A JP3101300B2 (en) | 1990-07-13 | 1990-07-13 | Organic electroluminescent device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02185645A JP3101300B2 (en) | 1990-07-13 | 1990-07-13 | Organic electroluminescent device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0473886A JPH0473886A (en) | 1992-03-09 |
| JP3101300B2 true JP3101300B2 (en) | 2000-10-23 |
Family
ID=16174396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02185645A Expired - Fee Related JP3101300B2 (en) | 1990-07-13 | 1990-07-13 | Organic electroluminescent device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3101300B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05253035A (en) * | 1992-01-16 | 1993-10-05 | General Motors Corp <Gm> | Headrest for passenger vehicle seat |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5416438A (en) * | 1992-03-18 | 1995-05-16 | Nec Corporation | Active filter circuit suited to integration on IC chip |
| JP3861400B2 (en) * | 1997-09-01 | 2006-12-20 | セイコーエプソン株式会社 | Electroluminescent device and manufacturing method thereof |
| US6497969B2 (en) | 1997-09-05 | 2002-12-24 | Nessdisplay Co., Ltd. | Electroluminescent device having an organic layer including polyimide |
| JPH11199864A (en) | 1997-10-10 | 1999-07-27 | Koto Gijutsu Kenkyuin Kenkyu Kumiai | Production of electroluminescence device |
| CN1150639C (en) | 1998-12-17 | 2004-05-19 | 剑桥显示技术有限公司 | Organic light-emitting devices |
| DE10238799A1 (en) * | 2002-08-23 | 2004-03-11 | Siemens Ag | Organic light emitting diode (OLED) and / or display, sealing process and use thereof |
| JP2004281247A (en) * | 2003-03-17 | 2004-10-07 | Pioneer Electronic Corp | Organic electroluminescent display panel and its manufacturing method |
| CN103915256A (en) * | 2014-03-25 | 2014-07-09 | 无锡宸瑞新能源科技有限公司 | Thin film capacitor for medium-and-low-power photovoltaic inverter |
-
1990
- 1990-07-13 JP JP02185645A patent/JP3101300B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05253035A (en) * | 1992-01-16 | 1993-10-05 | General Motors Corp <Gm> | Headrest for passenger vehicle seat |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0473886A (en) | 1992-03-09 |
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