JPH1154266A - Luminescent display - Google Patents
Luminescent displayInfo
- Publication number
- JPH1154266A JPH1154266A JP9206849A JP20684997A JPH1154266A JP H1154266 A JPH1154266 A JP H1154266A JP 9206849 A JP9206849 A JP 9206849A JP 20684997 A JP20684997 A JP 20684997A JP H1154266 A JPH1154266 A JP H1154266A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- organic
- light
- emitting display
- moisture
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 claims abstract description 33
- 229920001709 polysilazane Polymers 0.000 claims abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 abstract description 9
- 238000004528 spin coating Methods 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000007598 dipping method Methods 0.000 abstract description 2
- 238000007639 printing Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000004411 aluminium Substances 0.000 abstract 2
- 244000025254 Cannabis sativa Species 0.000 abstract 1
- 238000000151 deposition Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 6
- 238000007740 vapor deposition Methods 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- -1 or the like Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- YRCAUVMBMCBDBX-UHFFFAOYSA-N N-[4-(4-aminophenyl)phenyl]-2,4-dimethylaniline Chemical compound CC1=CC(C)=CC=C1NC1=CC=C(C=2C=CC(N)=CC=2)C=C1 YRCAUVMBMCBDBX-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 125000000319 biphenyl-4-yl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/874—Passivation; Containers; Encapsulations including getter material or desiccant
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は発光ディスプレイに
係わり、更に詳しくは、有機発光材料を用いた発光ディ
スプレイに関する。[0001] 1. Field of the Invention [0002] The present invention relates to a light emitting display, and more particularly, to a light emitting display using an organic light emitting material.
【０００２】[0002]
【従来の技術】近年液晶表示体がワードプロセッサー、
パーソナルコンピュータ等の表示部として盛んに用いら
れている。この液晶表示体は非発光素子であり明るさの
点、特に反射型ディスプレイで用いる時問題となってい
る。ここへきて薄型、軽量の特徴を有す有機の発光材料
（以後有機ＥＬ材料という）を用いた発光ディスプレイ
が注目されている。2. Description of the Related Art In recent years, liquid crystal displays have become word processors,
It is widely used as a display unit of a personal computer or the like. This liquid crystal display is a non-light-emitting element and has a problem in brightness, particularly when used in a reflective display. Attention has been paid to a light-emitting display using an organic light-emitting material having a thin and lightweight characteristic (hereinafter referred to as an organic EL material).
【０００３】この発光ディスプレイの断面図を図１に示
す。図において１はアルミニウム電極を、２は有機ＥＬ
材料を、３はＩＴＯ透明電極を、４はガラス基板を、５
は電源をそれぞれ示す。この発光ディスプレイの作成方
法は以下の通りである。まず、透明基板上にスパッター
法、蒸着法等によりＩＴＯ等の透明電極の薄膜を付け
る。この後、ホトリソグラフィー法等により所望の形状
の電極とする。しかる後、スピンコート法、蒸着法等に
より有機ＥＬ材料をコートし発光層を形成する。更に仕
事関数の低い金属、例えば、マグネシウム、アルミニウ
ム、リチウム等、あるいはこれら金属の合金を蒸着、ス
パッタ法等によりとばすことにより対向電極を得ること
が出来る。以上が基本の工程であるが、発光効率を上げ
るために、更に透明電極を付けた後に、ホール輸送材
料、例えばＮ，Ｎ’−ジフェニル−Ｎ，Ｎ’−（２，４
−ジメチルフェニル）−１，１’−ビフェニル−４，
４’−ジアミンを蒸着法等により付けても良い。また有
機ＥＬ材料を付けた後、電子輸送材料を、例えば２−
（４−ビフェニル）−５−（４−ｔｅｒｔ−ブチルフェ
ニル）−１，３，４−オキシジアゾールを付けても良
い。FIG. 1 shows a cross-sectional view of this light emitting display. In the figure, 1 is an aluminum electrode, 2 is an organic EL
Material, 3 is ITO transparent electrode, 4 is glass substrate, 5
Indicates a power source, respectively. The method of making this light emitting display is as follows. First, a thin film of a transparent electrode such as ITO is formed on a transparent substrate by a sputtering method, a vapor deposition method, or the like. Thereafter, an electrode having a desired shape is formed by photolithography or the like. Thereafter, an organic EL material is coated by a spin coating method, an evaporation method, or the like to form a light emitting layer. Further, a counter electrode can be obtained by blowing a metal having a low work function, for example, magnesium, aluminum, lithium, or the like, or an alloy of these metals by vapor deposition, sputtering, or the like. The above is the basic process, but in order to increase the luminous efficiency, a hole transporting material such as N, N′-diphenyl-N, N ′-(2,4
-Dimethylphenyl) -1,1'-biphenyl-4,
4′-diamine may be attached by a vapor deposition method or the like. After attaching the organic EL material, the electron transporting material is changed to, for example, 2-
(4-biphenyl) -5- (4-tert-butylphenyl) -1,3,4-oxydiazole may be added.
【０００４】この対向する２種の電極に電界を印加する
事により発光させることが出来る。この発光ディスプレ
イの特徴として、１０ボルト以下の低電圧で駆動できる
事がある。この有機ＥＬ材料を用いた発光ディスプレイ
は将来有望な技術であるが、しかし、寿命が短い欠点が
あった。発光ディスプレイの寿命としては色々考えるこ
とができる。例えば有機ＥＬ材の劣化により、電流値の
増加も考えることが出来る。しかし電流値の増加は外観
的には問題ないのでここで考える寿命として発光部の部
分的劣化や発光部の不均一性がでた時をその発光ディス
プレイの寿命とした。このように寿命を定義したとき、
有機ＥＬ材料を用いた従来の発光ディスプレイの、最初
に、発光部の周辺が劣化、黒化するか、あるいは周辺と
中央部に発光強度の不均一が見られる時間は、電流値が
増え始める時間より長くなるが、それでも液晶表示体の
寿命に比べたらかなり短いものになる。Light can be emitted by applying an electric field to the two opposite electrodes. A feature of this light emitting display is that it can be driven at a low voltage of 10 volts or less. The light emitting display using the organic EL material is a promising technology in the future, but has a drawback that the lifetime is short. Various considerations can be given to the life of the light emitting display. For example, an increase in the current value due to deterioration of the organic EL material can be considered. However, the increase in the current value does not cause a problem in appearance. Therefore, the lifetime considered here is defined as the lifetime of the light emitting display when partial deterioration of the light emitting portion or unevenness of the light emitting portion occurs. When life is defined in this way,
First, in the conventional light emitting display using the organic EL material, the time when the periphery of the light emitting portion is deteriorated or blackened or the light emission intensity is uneven at the periphery and the center is the time when the current value starts to increase. It is longer, but still much shorter than the life of the liquid crystal display.
【０００５】[0005]
【発明が解決しようとする課題】本発明はこのような有
機ＥＬ材料を用いた発光ディスプレイの寿命が短いとい
う問題を解決するためになされたもので、その目的は従
来の作成方法をあまり変えることなく、有機ＥＬを用い
た寿命の長い発光ディスプレイを提供するためになされ
たものである。SUMMARY OF THE INVENTION The present invention has been made to solve the problem that the life of a light-emitting display using such an organic EL material is short, and its purpose is to change the conventional manufacturing method very much. Instead, it is intended to provide a long-life light-emitting display using an organic EL.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、発光材料と該発光材料を挟む電極材料よりなる本発
明の発光ディスプレイは、対向電極を形成後、ポリシラ
ザン（東燃製）を塗布し、比較的低い温度で乾燥し、完
全に反応が進まない程度で加熱をやめ、未反応部を残す
ことを特徴とする。塗布の方法としたはスピンコート
法、ディピング法、印刷法等色々考えることが出来る。
どの方法を用いても同じような効果が得られることは自
明のことである。In order to solve the above-mentioned problems, a light-emitting display of the present invention comprising a light-emitting material and an electrode material sandwiching the light-emitting material is provided with a polysilazane (made by Tonen) after forming a counter electrode. It is characterized by drying at a relatively low temperature, stopping the heating to such an extent that the reaction does not completely proceed, and leaving an unreacted portion. Various methods such as a spin coating method, a dipping method, and a printing method can be used as the coating method.
It is self-evident that the same effect can be obtained by any method.
【０００７】本発明は封じ材としてポリシラザン（東燃
製）を用い、完全に反応させずに未反応部を残すことあ
り、発光部の材料、形状、あるいは駆動能方式は以上の
べた他にも考えられることは自明のことである。The present invention uses polysilazane (manufactured by Tonen) as a sealing material and may leave an unreacted portion without completely reacting. Therefore, the material, shape, and driving capability of the light emitting portion are considered in addition to the above. It is self-evident.
【０００８】[0008]
【発明の実施の形態】以上のべた様に対向電極形成後、
ポリシラザンを塗布し、部分的に未反応部分が残るよう
に適当な温度で焼成乾燥することにより、空気中からの
酸素や水分が膜中で反応することにより、酸素や、水分
が発光部に進入しなくなる。このため有機ＥＬ材料の劣
化が防げ、発光ディスプレイの寿命が長くなる。このよ
うな簡単な方法で従来の発光ディスプレイの寿命を効果
的に延ばすことが出来る。以下実施例により本発明を詳
細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, after forming a counter electrode,
Polysilazane is applied and baked and dried at an appropriate temperature so that partially unreacted parts remain. Oxygen and moisture from the air react in the film, so that oxygen and moisture enter the light emitting part. No longer. For this reason, deterioration of the organic EL material can be prevented, and the life of the light-emitting display is prolonged. Such a simple method can effectively extend the life of the conventional light emitting display. Hereinafter, the present invention will be described in detail with reference to examples.
【０００９】[0009]
（実施例１）図２、本発明の断面図を示す。図において
１１、ガラス基板を、１２はＩＴＯ透明電極を、１３有
機ＥＬ材料を、１４はアルミニウム電極を、１５はポリ
シラザンをそれぞれ示す。電極の形状はＩＴＯ透明電極
とアルミニウム電極が交差する部分が５ｍｍ×５ｍｍで
ある。(Embodiment 1) FIG. 2 shows a sectional view of the present invention. In the figure, 11 denotes a glass substrate, 12 denotes an ITO transparent electrode, 13 denotes an organic EL material, 14 denotes an aluminum electrode, and 15 denotes polysilazane. As for the shape of the electrode, a portion where the ITO transparent electrode and the aluminum electrode intersect is 5 mm × 5 mm.
【００１０】まず５ｍｍ幅のＩＴＯ透明電極付きのガラ
ス基板を用意し、アルカリ洗浄した後、イソプロピルア
ルコールで洗浄し、乾燥した。このＩＴＯ付き電極を有
すガラス基板の上にスピンコート法により、ポリパラフ
ェニレンビニレンの０．５重量パーセント前駆体水溶液
を用い、１ミクロンの膜を作成した。更にアルミニウム
金属を２０００オングストローム蒸着した。このように
して得た基板のアルミニウム電極側に、蒸着機から取り
出した直後にスピンコート法により、ポリシラザン膜を
４０００オングストロームコートした。コート後８０度
Ｃで１０間乾燥した。この発光ディスプレイは１０Ｖで
十分駆動できた。放置試験をしたところ３カ月経過して
もなんら問題はなかった。First, a glass substrate having an ITO transparent electrode having a width of 5 mm was prepared, washed with alkali, washed with isopropyl alcohol, and dried. Using a 0.5% by weight aqueous solution of a polyparaphenylenevinylene precursor, a 1-micron film was formed on a glass substrate having an electrode with ITO by spin coating. Further, 2000 Å of aluminum metal was deposited. Immediately after the substrate thus obtained was taken out of the vapor deposition machine, the polysilazane film was coated on the aluminum electrode side by 4000 angstrom by spin coating. After coating, it was dried at 80 ° C. for 10 minutes. This light emitting display could be driven sufficiently at 10V. When the standing test was carried out, there was no problem even after 3 months.
【００１１】（比較例）実施例１と同様にしてポリシラ
ザンをコートしない発光ディスプレイを作成して同じよ
うに試験をしたところ、４日間経過した時点で点灯しな
くなった。Comparative Example A light-emitting display not coated with polysilazane was prepared in the same manner as in Example 1, and the same test was conducted. As a result, no light was emitted after 4 days.
【００１２】以上述べたように発光部の形状をなめらか
にすることにより、発光ディスプレイの寿命を延ばすこ
とが出来る事がわかった。As described above, it has been found that the life of the light emitting display can be extended by making the shape of the light emitting portion smooth.
【００１３】本発明の方法は、本発明の要旨を逸脱しな
い限り、上記以外の、その他のなめらかにする方法、絶
縁材料，有機ＥＬ材料等に適用できるものである。The method of the present invention can be applied to other smoothing methods other than the above, insulating materials, organic EL materials, etc., without departing from the gist of the present invention.
【００１４】例えば、実施例では高分子系の有機ＥＬ材
料を用いたが低分子系の有機ＥＬ材料についても適用で
きるものである。またインクジェットプリンティング装
置により赤、緑、青の三色の有機ＥＬ材料を飛ばすこと
によりフルカラーの発光ディスプレイを作成できること
は自明のことである。また発光効率を上げるためにホー
ル輸送層や電子輸送層を形成出来ることも自明のことで
ある。For example, in the embodiments, a high molecular weight organic EL material is used, but the present invention can be applied to a low molecular weight organic EL material. Also, it is obvious that a full-color light-emitting display can be produced by flying three colors of organic EL materials of red, green and blue by an ink jet printing apparatus. It is also obvious that a hole transport layer or an electron transport layer can be formed in order to increase luminous efficiency.
【００１５】[0015]
【発明の効果】以上実施例で説明したように従来の方法
をあまり変更することなく、単に発光ディスプレイの発
光部の形状をなめらかにするだけで、発光ディスプレイ
の寿命を延ばすことが出来る。As described in the above embodiments, the life of the light emitting display can be extended only by making the shape of the light emitting portion of the light emitting display smooth without changing the conventional method much.
【図１】発光ディスプレイの断面図。FIG. 1 is a cross-sectional view of a light-emitting display.
【図２】本発明の発光ディスプレイの電極の断面図。FIG. 2 is a sectional view of an electrode of the light emitting display of the present invention.
１・・・・アルミニウム電極 ２・・・・有機ＥＬ材料 ３・・・・ＩＴＯ電極 ４・・・・ガラス基板 ５・・・・電源 １１・・・ガラス基板 １２・・・ＩＴＯ透明電極 １３・・・有機ＥＬ材料 １４・・・アルミニウム電極 １５・・・ポリシラザン １６・・・電源 DESCRIPTION OF SYMBOLS 1 ... Aluminum electrode 2 ... Organic EL material 3 ... ITO electrode 4 ... Glass substrate 5 ... Power supply 11 ... Glass substrate 12 ... ITO transparent electrode 13. ..Organic EL material 14 ... Aluminum electrode 15 ... Polysilazane 16 ... Power supply
Claims (2)
該基板上に形成される発光材料、及び発光材料上に形成
される対向電極よりなる発光ディスプレイにおいて、対
向電極形成後、対向電極側の、電極及び発光材料を酸
素、及び水分吸収機能を有す材料で被覆することを特徴
とする発光ディスプレイ。1. A substrate having at least an ITO transparent electrode,
In a light-emitting display including a light-emitting material formed on the substrate and a counter electrode formed on the light-emitting material, after forming the counter electrode, the electrode and the light-emitting material on the counter electrode side have oxygen and moisture absorbing functions. A light emitting display characterized by being coated with a material.
材料がポリシラザンであることを特徴とする発光ディス
プレイ。2. A light-emitting display according to claim 1, wherein the material having the function of absorbing oxygen and moisture is polysilazane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9206849A JPH1154266A (en) | 1997-07-31 | 1997-07-31 | Luminescent display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9206849A JPH1154266A (en) | 1997-07-31 | 1997-07-31 | Luminescent display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1154266A true JPH1154266A (en) | 1999-02-26 |
Family
ID=16530077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9206849A Withdrawn JPH1154266A (en) | 1997-07-31 | 1997-07-31 | Luminescent display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1154266A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001345174A (en) * | 2000-03-27 | 2001-12-14 | Semiconductor Energy Lab Co Ltd | Spontaneous light emitting device and method of manufacturing thereof |
| WO2002009478A1 (en) * | 2000-07-24 | 2002-01-31 | Tdk Corporation | Luminescent device |
| US6501014B1 (en) * | 1999-10-08 | 2002-12-31 | Tdk Corporation | Coated article and solar battery module |
| US6673436B2 (en) | 2000-05-17 | 2004-01-06 | Dynic Corporation | Moisture absorbing formed article |
| EP1503436A2 (en) * | 2003-08-01 | 2005-02-02 | Kabushiki Kaisha Toyota Jidoshokki | EL device and method for manufacturing the same |
| JP2009259788A (en) * | 2008-03-21 | 2009-11-05 | Tdk Corp | Display |
-
1997
- 1997-07-31 JP JP9206849A patent/JPH1154266A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6501014B1 (en) * | 1999-10-08 | 2002-12-31 | Tdk Corporation | Coated article and solar battery module |
| JP2001345174A (en) * | 2000-03-27 | 2001-12-14 | Semiconductor Energy Lab Co Ltd | Spontaneous light emitting device and method of manufacturing thereof |
| JP4618918B2 (en) * | 2000-03-27 | 2011-01-26 | 株式会社半導体エネルギー研究所 | Method for manufacturing self-luminous device |
| US6673436B2 (en) | 2000-05-17 | 2004-01-06 | Dynic Corporation | Moisture absorbing formed article |
| WO2002009478A1 (en) * | 2000-07-24 | 2002-01-31 | Tdk Corporation | Luminescent device |
| US6781148B2 (en) | 2000-07-24 | 2004-08-24 | Tdk Corporation | Light emitting device |
| EP1503436A2 (en) * | 2003-08-01 | 2005-02-02 | Kabushiki Kaisha Toyota Jidoshokki | EL device and method for manufacturing the same |
| EP1503436A3 (en) * | 2003-08-01 | 2010-06-23 | Kabushiki Kaisha Toyota Jidoshokki | EL device and method for manufacturing the same |
| JP2009259788A (en) * | 2008-03-21 | 2009-11-05 | Tdk Corp | Display |
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