JPH06151063A - Organic electroluminescent element - Google Patents
Organic electroluminescent elementInfo
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- JPH06151063A JPH06151063A JP4303841A JP30384192A JPH06151063A JP H06151063 A JPH06151063 A JP H06151063A JP 4303841 A JP4303841 A JP 4303841A JP 30384192 A JP30384192 A JP 30384192A JP H06151063 A JPH06151063 A JP H06151063A
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- electrode
- light
- light emitting
- organic
- emitting layer
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、有機エレクトロルミネ
ッセンス素子（以下、有機ＥＬ素子と称する）に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescence device (hereinafter referred to as an organic EL device).
【０００２】[0002]
【従来の技術】有機ＥＬ素子は、例えば図１に示すよう
に、ガラス基板１上に陽極である透明電極２と陰極であ
る金属電極３との間に、有機化合物からなり互いに積層
された有機正孔輸送層４及び発光層としての有機蛍光体
薄膜５が形成された２層構造が採られている。ここで、
有機正孔輸送層４は、透明電極２から正孔を注入しやす
くする機能と電子をブロックする機能とを有している。
発光層では金属電極３から注入された電子と有機正孔輸
送層４から注入された正孔との再結合によって励起子が
生じ、この励起子が放射失活する過程で光を放ち、この
光が透明電極２及びガラス基板１を介して外部に放出さ
れる。2. Description of the Related Art As shown in FIG. 1, for example, an organic EL element is formed by stacking an organic compound on a glass substrate 1 between a transparent electrode 2 as an anode and a metal electrode 3 as a cathode. A two-layer structure in which a hole transport layer 4 and an organic phosphor thin film 5 as a light emitting layer are formed is adopted. here,
The organic hole transport layer 4 has a function of facilitating injection of holes from the transparent electrode 2 and a function of blocking electrons.
In the light emitting layer, excitons are generated by recombination of electrons injected from the metal electrode 3 and holes injected from the organic hole transport layer 4, and the excitons emit light in the process of radiation deactivation. Are emitted to the outside through the transparent electrode 2 and the glass substrate 1.
【０００３】かかる有機ＥＬ素子は、電流注入型の素子
であるために、その発光効率は各電極１，２の仕事関数
に大きく依存する。そこで、電子を注入する金属電極
１、すなわち陰極については多くの検討がなされてき
た。しかし、電極の少なくとも片側、すなわち図１にお
ける透明電極２は、少なくとも発光層で生じた光を透過
させなければならないために、主にＩＴＯ（Indium Tin
Oxide）や酸化錫（ＳnＯ2）などで形成されることが多
く、透明電極２のキャリヤに対する注入効果については
あまり問題にされなかった。Since such an organic EL element is a current injection type element, the luminous efficiency thereof largely depends on the work functions of the electrodes 1 and 2. Therefore, many studies have been made on the metal electrode 1 for injecting electrons, that is, the cathode. However, since at least one side of the electrode, that is, the transparent electrode 2 in FIG. 1 must transmit at least light generated in the light emitting layer, it is mainly ITO (Indium Tin).
Oxide), tin oxide (SnO 2 ) or the like, and the effect of injecting the transparent electrode 2 into the carrier has not been a problem.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、光を透過さ
せる電極に着眼し、この電極の透過率を維持しつつも発
光効率が高い構造の有機ＥＬ素子を提供することにあ
る。SUMMARY OF THE INVENTION It is an object of the present invention to provide an organic EL device having a structure which focuses on an electrode which transmits light and has a high luminous efficiency while maintaining the transmittance of this electrode.
【０００５】[0005]
【課題を解決するための手段】本発明の有機ＥＬ素子
は、少なくとも有機化合物からなる発光層と、前記発光
層を介して互いに対向する電極対と、が基板上に積層さ
れてなり、前記発光層から光が発せられる有機エレクト
ロルミネッセンス素子であって、前記電極対のうち前記
光を透過せしめる透明電極は、導電性金属酸化物を主成
分とし前記金属酸化物とは異なる仕事関数を有する金属
を添加金属として微量含有するものである。The organic EL device of the present invention comprises a light emitting layer made of at least an organic compound and a pair of electrodes facing each other with the light emitting layer interposed therebetween, and the electrode pair is laminated on the substrate. In the organic electroluminescence element in which light is emitted from the layer, the transparent electrode that transmits the light in the electrode pair is a metal having a work function different from that of the conductive metal oxide as a main component and the metal oxide. It is contained in a trace amount as an added metal.
【０００６】[0006]
【作用】本発明の有機ＥＬ素子において、光が透過する
透明電極の仕事関数は導電性金属酸化物に含まれる添加
金属の種類及び含有量により制御されるので、この透明
電極から発光層への電子及び正孔の少なくとも一方の注
入効率を高くでき、光の透過率が低下することなく有機
ＥＬ素子の発光効率が向上される。In the organic EL device of the present invention, the work function of the transparent electrode through which light is transmitted is controlled by the kind and content of the additive metal contained in the conductive metal oxide. The injection efficiency of at least one of electrons and holes can be increased, and the light emission efficiency of the organic EL element is improved without lowering the light transmittance.
【０００７】[0007]
【実施例】本発明の実施例を図１乃至図４に基づいて説
明する。本実施例による有機ＥＬ素子は、図１に示す従
来の有機ＥＬ素子と同様に、ガラス基板１上に順に透明
電極２、有機化合物層、及び透明電極２に対向する電極
３が積層形成され、これら電極２，３は直流電源６に接
続された構造を採っている。例えば、図１に示すように
透明電極２を陽極として形成した場合、発光層として陽
極２側から順に、例えばＮ，Ｎ´−ジフェニル−Ｎ，Ｎ
´−ビス（３メチルフェニル）−１，１´−ビフェニル
−４，４´−ジアミン（ＴＰＤ）からなる有機正孔輸送
層４と、例えばトリス（８−キノリノール）アルミニウ
ム（Ａlq3）からなる有機蛍光体薄膜５とが積層形成さ
れており、発光層を発した光は陽極２及びガラス基板１
を透過して素子の外部に放出される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In the organic EL element according to the present embodiment, similarly to the conventional organic EL element shown in FIG. 1, a transparent electrode 2, an organic compound layer, and an electrode 3 facing the transparent electrode 2 are sequentially laminated on a glass substrate 1, These electrodes 2 and 3 have a structure connected to a DC power supply 6. For example, when the transparent electrode 2 is formed as an anode as shown in FIG. 1, as a light emitting layer, for example, N, N′-diphenyl-N, N is sequentially formed from the anode 2 side.
An organic hole transport layer 4 made of ′ -bis (3methylphenyl) -1,1′-biphenyl-4,4′-diamine (TPD) and an organic hole transport layer 4 made of, for example, tris (8-quinolinol) aluminum (Alq 3 ). The phosphor thin film 5 is laminated and the light emitted from the light emitting layer is emitted from the anode 2 and the glass substrate 1.
And is emitted to the outside of the device.
【０００８】上記陽極２は、例えばＩＴＯ，ＳnＯ2 ，
酸化亜鉛（ＺnＯ），酸化インジウムカドミウム（ＣdＩ
n2Ｏ2），酸化錫カドミウム（Ｃd2ＳnＯ4）などの導電
性金属酸化物を主成分とし、例えば表１に示す仕事関数
を有する仕事関数の高い白金（Ｐt ）、金（Ａu ）、パ
ラジウム（Ｐd ）等の仕事関数の大きな金属、すなわち
５．０ｅＶ以上のを添加金属として微量含有するものか
らなる。The anode 2 is made of, for example, ITO, SnO 2 ,
Zinc oxide (ZnO), indium cadmium oxide (CdI
n 2 O 2 ), tin cadmium oxide (Cd 2 SnO 4 ), etc. as a main component, and platinum (Pt), gold (Au) with a high work function having the work function shown in Table 1, It is composed of a metal having a large work function such as palladium (Pd), that is, a material containing a trace amount of 5.0 eV or more as an added metal.
【０００９】[0009]
【表１】 [Table 1]
【００１０】上記陽極２は、２元スパッタ法や共蒸着
法、ないしは予めガラス基板１に導電性金属酸化物から
なる導電膜を形成した後で例えば表１の金属を導電膜の
内部にドーピングさせる方法などの適当な方法で、所望
の金属含有率となるように作製される。従って、陽極２
の仕事関数は、添加金属の種類及び含有量により制御さ
れて変化するので、この陽極２から正孔が効率良く発光
層に注入されるようにその種類及び含有量を調整するこ
とができる。The anode 2 is formed by a binary sputtering method or a co-deposition method, or a conductive film made of a conductive metal oxide is formed on the glass substrate 1 in advance, and then the metal shown in Table 1 is doped inside the conductive film. It is produced by a suitable method such as a method so as to have a desired metal content. Therefore, the anode 2
Since the work function of is changed by being controlled by the kind and content of the added metal, the kind and content can be adjusted so that holes can be efficiently injected from the anode 2 into the light emitting layer.
【００１１】次に具体例を示す。 ［具体例１］ガラス基板１に２元スパッタ法にてＩＴＯ
及びＰｔを１０００オングストロームの膜厚で蒸着し
て、０．１０wt％のＰt を含有するＩＴＯからなる陽極
２を作製する。この陽極２上にＴＰＤを５００オングス
トロームの膜厚で蒸着して正孔輸送層４を形成し、この
正孔輸送層４の上にＡlq3 を蒸着して蛍光体層５を形成
し、さらにこの蛍光体層５の上にＭg 及びＡl を原子比
１０：１で１５００オングストロームの膜厚に共蒸着し
て陰極３とし、有機ＥＬ素子を作製した。この素子に電
流７．５mA/cm2を流すと、輝度は５０８cd/m2、電圧
４．５Ｖであった。A specific example will be shown below. [Specific Example 1] ITO is formed on the glass substrate 1 by the two-source sputtering method.
And Pt are vapor-deposited to a film thickness of 1000 angstrom to form the anode 2 made of ITO containing 0.10 wt% of Pt. A hole transport layer 4 is formed by vapor-depositing TPD on the anode 2 to a thickness of 500 Å, and Alq 3 is vapor-deposited on the hole transport layer 4 to form a phosphor layer 5. On the phosphor layer 5, Mg and Al were co-deposited in an atomic ratio of 10: 1 to a film thickness of 1500 Å to form the cathode 3, and an organic EL device was prepared. When a current of 7.5 mA / cm 2 was passed through this element, the brightness was 508 cd / m 2 and the voltage was 4.5V.
【００１２】［比較例］ガラス基板１にＩＴＯの陽極２
を作製した。この陽極２上にＴＰＤを５００オングスト
ロームの膜厚で蒸着して正孔輸送層４を形成し、この正
孔輸送層４の上にＡlq3 を蒸着して蛍光体層５を形成
し、さらにこの蛍光体層５の上にＭg 及びＡl を原子比
１０：１で１５００オングストロームの膜厚に共蒸着し
て陰極３とし、有機ＥＬ素子を作製した。この素子に電
流７．５mA/cm2を流すと、輝度は３１０cd/m2、電圧
５．０Ｖとなった。[Comparative Example] ITO anode 2 on glass substrate 1
Was produced. A hole transport layer 4 is formed by vapor-depositing TPD on the anode 2 to a thickness of 500 Å, and Alq 3 is vapor-deposited on the hole transport layer 4 to form a phosphor layer 5. On the phosphor layer 5, Mg and Al were co-deposited in an atomic ratio of 10: 1 to a film thickness of 1500 Å to form the cathode 3, and an organic EL device was prepared. When a current of 7.5 mA / cm 2 was passed through this element, the brightness was 310 cd / m 2 and the voltage was 5.0 V.
【００１３】このように、具体例１と比較例とを比較す
ると、本発明による素子では発光効率が向上することが
判る。故に、本発明を陽極２に適用した場合、陽極２か
ら発光層に正孔を効率良く注入できるようになり、有機
ＥＬ素子の発光効率を改善することができる。次に、電
極２を陰極として形成した場合について説明する。この
素子においては、図２に示すように、ガラス基板１上に
順に、透明電極３ａ、発光層としての有機蛍光体薄膜５
及び有機正孔輸送層４と、陽極となる電極２ａが積層形
成された構造を採り、発光層を発した光は陰極３ａ及び
ガラス基板１を透過して素子の外部に放出される。As described above, by comparing the specific example 1 with the comparative example, it is understood that the device according to the present invention has improved luminous efficiency. Therefore, when the present invention is applied to the anode 2, holes can be efficiently injected from the anode 2 into the light emitting layer, and the light emitting efficiency of the organic EL element can be improved. Next, a case where the electrode 2 is formed as a cathode will be described. In this device, as shown in FIG. 2, a transparent electrode 3a and an organic phosphor thin film 5 as a light emitting layer are sequentially arranged on a glass substrate 1.
The organic hole transport layer 4 and the electrode 2a serving as an anode are laminated and the light emitted from the light emitting layer passes through the cathode 3a and the glass substrate 1 and is emitted to the outside of the device.
【００１４】上記陰極３ａは、前記陽極２と同様の導電
性金属酸化物に、例えばアルミニウム（Ａl ）、マグネ
シウム（Ｍg ）、カルシウム（Ｃa ）、ストロンチウム
（Ｓr ）、バリウム（Ｂa ）、リチウム（Ｌi ）等の仕
事関数の小さい金属、すなわち４．３ｅＶ以下の金属、
または酸化アルミニウム（Ａl2Ｏ3 ）、酸化マグネシウ
ム（ＭgＯ ）や酸化バリウム（ＢaＯ ）等の酸化物を添
加金属、すなわちドーパントとして微量含有するものか
らなる。この陰極３ａの形成方法は前記陽極２と同様の
適当な方法で、所望の金属含有率となるように作製され
る。The cathode 3a is made of the same conductive metal oxide as the anode 2, for example, aluminum (Al), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), lithium (Li). ) Such as a metal having a small work function, that is, a metal having a work function of 4.3 eV or less,
Alternatively, it is made of an oxide such as aluminum oxide (Al 2 O 3 ), magnesium oxide (MgO) or barium oxide (BaO) as an additive metal, that is, a material containing a trace amount as a dopant. The cathode 3a is formed by an appropriate method similar to that of the anode 2, and is manufactured so as to have a desired metal content.
【００１５】そして、この陰極３ａの仕事関数は、添加
するドーパントの種類及び含有量により変化するので、
この陰極３ａから電子が効率良く発光層に注入されるよ
うにその種類及び含有量を調整することができる。次に
具体例を示す。 ［具体例２］ガラス基板１に２元スパッタ法にてＩＴＯ
及びＢaＯ を１０００オングストロームの膜厚で蒸着し
てＩＴＯ中にＢaＯ が０．０８wt％含有された陰極３ａ
を作製する。この陰極３ａ上に蛍光体層５としてＡlq3
を５００オングストロームの膜厚に蒸着形成し、この蛍
光体層５の上にＴＰＤを３５０オングストロームの膜厚
に蒸着して正孔輸送層４を形成し、この正孔輸送層４の
上にさらに以下の化学式で表されるＣｕ−ＰｃSince the work function of the cathode 3a changes depending on the kind and content of the dopant to be added,
The type and content can be adjusted so that electrons are efficiently injected from the cathode 3a into the light emitting layer. Next, a specific example is shown. [Specific Example 2] ITO is formed on the glass substrate 1 by the dual sputtering method.
And BaO 3 deposited to a thickness of 1000 Å to form a cathode 3a containing 0.08 wt% of BaO 3 in ITO.
To make. Alq 3 as a phosphor layer 5 is formed on the cathode 3a.
Is vapor-deposited to a film thickness of 500 angstrom, TPD is vapor-deposited to a film thickness of 350 angstrom on the phosphor layer 5 to form a hole transport layer 4, and the hole transport layer 4 is further Cu-Pc represented by the chemical formula
【００１６】[0016]
【化１】 [Chemical 1]
【００１７】を３５０オングストロームの膜厚に蒸着し
（図示せず）、さらにこの上に陽極２ａとしてＰt を１
５００オングストロームの膜厚で蒸着形成して有機ＥＬ
素子を作製した。この素子に電流７．５mA/cm2を流す
と、輝度は６２０cd/m2、電圧４．８Ｖであった。この
ように、具体例２と比較例とを比較すると、本発明によ
る素子では発光効率が向上することが判る。Was vapor-deposited to a film thickness of 350 Å (not shown), and Pt 1 was added as an anode 2a thereon.
Organic EL by vapor deposition with a thickness of 500 Å
A device was produced. When a current of 7.5 mA / cm 2 was passed through this element, the brightness was 620 cd / m 2 and the voltage was 4.8 V. Thus, comparing Example 2 with Comparative Example, it can be seen that the device according to the present invention has improved luminous efficiency.
【００１８】また、陰極３ａが光を透過せしめるために
透明であるから、陽極２ａが不透明であっても良く、Ｐ
ｔやＰｄ等の仕事関数の大きい金属からなる陽極２ａの
膜厚を厚く均一に形成することができる。従って、この
ような素子構造においては陽極２ａの素材及び膜厚の選
択の範囲が拡張される。故に、本発明を陰極３ａに適用
した場合、陽極２ａからの正孔の注入効率を向上させる
ことができるとともに陰極３ａからは発光層に電子を効
率良く注入できるので、有機ＥＬ素子の発光効率を改善
することができる。Further, since the cathode 3a is transparent for transmitting light, the anode 2a may be opaque.
The thickness of the anode 2a made of a metal having a large work function such as t or Pd can be made thick and uniform. Therefore, in such an element structure, the range of selection of the material and film thickness of the anode 2a is expanded. Therefore, when the present invention is applied to the cathode 3a, the efficiency of injecting holes from the anode 2a can be improved, and electrons can be efficiently injected from the cathode 3a to the light emitting layer. Can be improved.
【００１９】なお、本願発明による有機ＥＬ素子におい
ては、電極２及び３ａとなる透明電極に含まれる添加金
属の含有量は、光の透過率を損なわず且つ所望の仕事関
数が得られるようにするために０．０１wt％〜１０wt％
が好ましい。この範囲を外れた場合、すなわち添加金属
が１０wt％を越えて含まれる場合には光の透過率が低下
せしめられて素子の発光効率が低下し、一方添加金属が
０．０１wt％を下回る場合には仕事関数の制御が困難と
なってやはり素子の発光効率が低くなるなどの不都合が
生じることとなる。In the organic EL device according to the present invention, the content of the additive metal contained in the transparent electrodes to be the electrodes 2 and 3a is such that the light transmittance is not impaired and a desired work function is obtained. 0.01 wt% to 10 wt%
Is preferred. If the content is out of this range, that is, if the added metal exceeds 10 wt%, the light transmittance is reduced and the luminous efficiency of the device is lowered, while if the added metal is less than 0.01 wt%. However, it becomes difficult to control the work function, which also causes inconvenience such that the luminous efficiency of the device is lowered.
【００２０】さらに、本発明の有機ＥＬ素子において、
陽極２を仕事関数の大きな金属、すなわち５．０ｅＶ以
上の金属を添加金属として含む透明電極で形成し、同時
に陰極３ａを仕事関数の小さな金属、すなわち４．３ｅ
Ｖ以下の金属を添加金属として含む透明電極で形成した
場合、素子の両電極側からそれぞれ発光層の光を取り出
すことができる。従って、例えば図３に示すように上記
構造の有機ＥＬ素子を３層構造に積層形成して各発光層
が基板側から順に青（Ｂ），赤（Ｒ），緑（Ｇ）に発光
するようにすると、カラーの発光表示素子を作製するこ
とができる。Furthermore, in the organic EL device of the present invention,
The anode 2 is formed of a transparent electrode containing a metal having a large work function, that is, a metal having a work function of 5.0 eV or more as an added metal, and at the same time, the cathode 3a is a metal having a small work function, that is, 4.3e
When a transparent electrode containing a metal of V or less as an added metal is used, the light of the light emitting layer can be extracted from both electrode sides of the device. Therefore, for example, as shown in FIG. 3, the organic EL element having the above structure is laminated in a three-layer structure so that each light emitting layer sequentially emits light of blue (B), red (R), and green (G) from the substrate side. When it is set, a color light emitting display element can be manufactured.
【００２１】また、図４に示すように、両電極２，３ａ
をそれぞれ所望の仕事関数を呈する金属を添加金属とし
て含む透明電極で形成し、さらにガラス基板１と発光層
を介して対向する電極３ａの背面に黒色染料を塗布形成
して反射防止膜７とすると、ガラス基板１と発光層を介
して対向する陰極を反射膜として機能させる従来構造の
素子に比較して素子の外部に放出される光のコントラス
トを改善することができる。Further, as shown in FIG. 4, both electrodes 2, 3a
Is formed of a transparent electrode containing a metal exhibiting a desired work function as an additive metal, and a black dye is applied to the back surface of the electrode 3a facing the glass substrate 1 through the light emitting layer to form the antireflection film 7. It is possible to improve the contrast of light emitted to the outside of the device as compared with a device having a conventional structure in which the cathode facing the glass substrate 1 via the light emitting layer functions as a reflective film.
【００２２】[0022]
【発明の効果】本発明によれば、発光層を挟む電極対の
うち光を透過せしめる透明電極は、導電性金属酸化物を
主成分としさらにこの導電性金属酸化物とは異なる仕事
関数を有する金属を添加金属として微量含むものである
から、この透明電極の仕事関数は含まれる添加金属の種
類及び含有量に応じて制御できるので、発光層に効率良
く電子及び正孔の少なくとも一方を注入できて電子及び
正孔の注入効率を高くでき、素子の発光効率を向上させ
ることができる。According to the present invention, the transparent electrode which transmits light among the electrode pair sandwiching the light emitting layer contains a conductive metal oxide as a main component and has a work function different from that of the conductive metal oxide. Since the work function of this transparent electrode can be controlled according to the type and content of the added metal contained because it contains a trace amount of metal as an added metal, it is possible to efficiently inject at least one of an electron and a hole into the light emitting layer. In addition, the injection efficiency of holes can be increased, and the emission efficiency of the device can be improved.
【図１】有機ＥＬ素子を示す構成図である。FIG. 1 is a configuration diagram showing an organic EL element.
【図２】本発明による有機ＥＬ素子の一実施例を示す構
成図である。FIG. 2 is a configuration diagram showing an example of an organic EL device according to the present invention.
【図３】本発明による有機ＥＬ素子を適用した発光表示
素子の構成図である。FIG. 3 is a configuration diagram of a light emitting display device to which an organic EL device according to the present invention is applied.
【図４】本発明による有機ＥＬ素子の他の実施例を示す
構成図である。FIG. 4 is a constitutional view showing another embodiment of the organic EL element according to the present invention.
１ 基板 ２ 透明電極としての陽極 ３ 電極対をなす陰極 ２ａ 電極対をなす陽極 ３ａ 透明電極としての陰極 ４，５ 発光層 1 Substrate 2 Anode as a transparent electrode 3 Cathode forming an electrode pair 2a Anode forming an electrode pair 3a Cathode as a transparent electrode 4,5 Emitting layer
Claims (1)
と、前記発光層を介して互いに対向する電極対と、が基
板上に積層されてなり、前記発光層から光が発せられる
有機エレクトロルミネッセンス素子であって、 前記電極対のうち前記光を透過せしめる透明電極は、導
電性金属酸化物を主成分とし前記金属酸化物とは異なる
仕事関数を有する金属を添加金属として微量含有するこ
とを特徴とする有機エレクトロルミネッセンス素子。1. An organic electroluminescent device comprising: a light-emitting layer made of at least an organic compound; and a pair of electrodes facing each other with the light-emitting layer interposed therebetween, being laminated on a substrate, wherein light is emitted from the light-emitting layer. The transparent electrode that transmits the light in the electrode pair contains a trace amount of a metal having a conductive metal oxide as a main component and a work function different from that of the metal oxide as an added metal. Electroluminescent device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30384192A JP3300065B2 (en) | 1992-11-13 | 1992-11-13 | Organic electroluminescence device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30384192A JP3300065B2 (en) | 1992-11-13 | 1992-11-13 | Organic electroluminescence device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06151063A true JPH06151063A (en) | 1994-05-31 |
| JP3300065B2 JP3300065B2 (en) | 2002-07-08 |
Family
ID=17925954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30384192A Expired - Fee Related JP3300065B2 (en) | 1992-11-13 | 1992-11-13 | Organic electroluminescence device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3300065B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5837391A (en) * | 1996-01-17 | 1998-11-17 | Nec Corporation | Organic electroluminescent element having electrode between two fluorescent media for injecting carrier thereinto |
| US6054809A (en) * | 1996-08-14 | 2000-04-25 | Add-Vision, Inc. | Electroluminescent lamp designs |
| JP2000238325A (en) * | 1999-02-23 | 2000-09-05 | Futaba Corp | Organic el print head |
| JP2003017264A (en) * | 2001-04-27 | 2003-01-17 | Canon Inc | Electroluminescent element and image display device |
| JP2003197368A (en) * | 2001-12-26 | 2003-07-11 | Samsung Sdi Co Ltd | Organic electroluminescent display device |
| JP2004079422A (en) * | 2002-08-21 | 2004-03-11 | Tdk Corp | Organic el element |
| US6873099B2 (en) | 2001-05-31 | 2005-03-29 | Seiko Epson Corporation | EL device, EL display, EL illumination apparatus, liquid crystal apparatus using the EL illumination apparatus and electronic apparatus |
| US7410402B2 (en) | 2002-03-25 | 2008-08-12 | Dai Nippon Printing Co., Ltd. | Electrode for electroluminescence and electroluminescent device using the same |
| US7580014B2 (en) | 2003-06-26 | 2009-08-25 | Casio Computer Co., Ltd. | Display apparatus |
| US7772760B2 (en) | 2003-09-23 | 2010-08-10 | Samsung Mobile Display Co., Ltd. | Active matrix organic light emitting device |
| US8154193B2 (en) | 2002-08-09 | 2012-04-10 | Semiconductor Energy Laboratory Co., Ltd. | Organic electroluminescent device |
-
1992
- 1992-11-13 JP JP30384192A patent/JP3300065B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5837391A (en) * | 1996-01-17 | 1998-11-17 | Nec Corporation | Organic electroluminescent element having electrode between two fluorescent media for injecting carrier thereinto |
| US6054809A (en) * | 1996-08-14 | 2000-04-25 | Add-Vision, Inc. | Electroluminescent lamp designs |
| JP2000238325A (en) * | 1999-02-23 | 2000-09-05 | Futaba Corp | Organic el print head |
| JP2003017264A (en) * | 2001-04-27 | 2003-01-17 | Canon Inc | Electroluminescent element and image display device |
| US6873099B2 (en) | 2001-05-31 | 2005-03-29 | Seiko Epson Corporation | EL device, EL display, EL illumination apparatus, liquid crystal apparatus using the EL illumination apparatus and electronic apparatus |
| JP2003197368A (en) * | 2001-12-26 | 2003-07-11 | Samsung Sdi Co Ltd | Organic electroluminescent display device |
| US7410402B2 (en) | 2002-03-25 | 2008-08-12 | Dai Nippon Printing Co., Ltd. | Electrode for electroluminescence and electroluminescent device using the same |
| US8154193B2 (en) | 2002-08-09 | 2012-04-10 | Semiconductor Energy Laboratory Co., Ltd. | Organic electroluminescent device |
| US8339036B2 (en) | 2002-08-09 | 2012-12-25 | Semiconductor Energy Laboratory Co., Ltd. | Organic electroluminescent device |
| US8890404B2 (en) | 2002-08-09 | 2014-11-18 | Semiconductor Energy Laboratory Co., Ltd. | Organic electroluminescent device |
| US9209419B2 (en) | 2002-08-09 | 2015-12-08 | Semiconductor Energy Laboratory Co., Ltd. | Organic electroluminescent device |
| JP2004079422A (en) * | 2002-08-21 | 2004-03-11 | Tdk Corp | Organic el element |
| US7580014B2 (en) | 2003-06-26 | 2009-08-25 | Casio Computer Co., Ltd. | Display apparatus |
| US7772760B2 (en) | 2003-09-23 | 2010-08-10 | Samsung Mobile Display Co., Ltd. | Active matrix organic light emitting device |
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| Publication number | Publication date |
|---|---|
| JP3300065B2 (en) | 2002-07-08 |
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