JPH02204996A - Organic film type el element - Google Patents
Organic film type el elementInfo
- Publication number
- JPH02204996A JPH02204996A JP1020792A JP2079289A JPH02204996A JP H02204996 A JPH02204996 A JP H02204996A JP 1020792 A JP1020792 A JP 1020792A JP 2079289 A JP2079289 A JP 2079289A JP H02204996 A JPH02204996 A JP H02204996A
- Authority
- JP
- Japan
- Prior art keywords
- organic
- thin film
- hole injection
- polysylilene
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 claims abstract description 29
- 239000007924 injection Substances 0.000 claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract 2
- 239000010409 thin film Substances 0.000 claims description 48
- -1 polysilylene Polymers 0.000 claims description 20
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 15
- 125000003118 aryl group Chemical group 0.000 claims 2
- 125000000547 substituted alkyl group Chemical group 0.000 claims 2
- 125000003545 alkoxy group Chemical group 0.000 claims 1
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 125000000753 cycloalkyl group Chemical group 0.000 claims 1
- 125000005346 substituted cycloalkyl group Chemical group 0.000 claims 1
- 230000006866 deterioration Effects 0.000 abstract description 4
- 239000011521 glass Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000003618 dip coating Methods 0.000 abstract description 2
- 238000005566 electron beam evaporation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical group C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 abstract 1
- DCZNSJVFOQPSRV-UHFFFAOYSA-N n,n-diphenyl-4-[4-(n-phenylanilino)phenyl]aniline Chemical group C1=CC=CC=C1N(C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 DCZNSJVFOQPSRV-UHFFFAOYSA-N 0.000 abstract 1
- 238000007738 vacuum evaporation Methods 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004020 luminiscence type Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 2
- HKEBEJMIPXIINL-UHFFFAOYSA-N 2-methyl-n-[4-[1-[4-(2-methyl-n-(2-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(2-methylphenyl)aniline Chemical compound CC1=CC=CC=C1N(C=1C(=CC=CC=1)C)C1=CC=C(C2(CCCCC2)C=2C=CC(=CC=2)N(C=2C(=CC=CC=2)C)C=2C(=CC=CC=2)C)C=C1 HKEBEJMIPXIINL-UHFFFAOYSA-N 0.000 description 1
- YXYUIABODWXVIK-UHFFFAOYSA-N 4-methyl-n,n-bis(4-methylphenyl)aniline Chemical compound C1=CC(C)=CC=C1N(C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 YXYUIABODWXVIK-UHFFFAOYSA-N 0.000 description 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は平面光源やデイスプレィに使用される有機薄膜
ＥＬ素子に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an organic thin film EL element used for flat light sources and displays.
［従来の技術］
有機物質を原料としたＥＬ（電界発光）素子は、安価な
大面積フルカラー表示素子を実現するものとして注目を
集めている。例えばアントラセンやペリレン等の縮合多
環芳香族系を原料としてＬＢ法や真空蒸着法等で薄膜化
した直流駆動の有機薄膜Ｅｌ素子が製造され、その発光
特性が研究されている。しかし、従来の有機薄膜ＥＬ素
子は駆動電圧が高く、かつその発光輝度・効率が無機薄
膜ＥＬ素子のそれと比べて低かった。また、発光特性の
劣化も著しく、実用レベルのものはできなかった。[Prior Art] EL (electroluminescent) devices using organic materials as raw materials are attracting attention as they can realize inexpensive large-area full-color display devices. For example, DC-driven organic thin-film El elements have been manufactured using condensed polycyclic aromatic systems such as anthracene and perylene as raw materials and made into thin films by the LB method, vacuum evaporation method, etc., and their light-emitting characteristics have been studied. However, conventional organic thin film EL devices require a high driving voltage, and their luminance and efficiency are lower than those of inorganic thin film EL devices. In addition, the luminescence properties deteriorated significantly, making it impossible to achieve a practical level.
ところが、最近、有機薄膜を２層構造にした新しいタイ
プの有機薄膜ＥＬ素子が報告され、強い関心を集めてい
る（アプライド・フィジックス・レターズ、５１巻、９
１３ページ、１９８１年参照）。報告によれば、この有
機薄膜Ｅし素子は、第２図に示すように、強い蛍光を発
する金属キレート鏡体を有機蛍光体薄膜層２４に使用し
、アミン系材料を正孔伝導性有機物の正孔注入層２３に
使用して２層構造とし、これらを透明電極２２および背
面電極２５で挟むことにより、明るい緑色発光を得たこ
とが開示されており、６〜７■の直流電圧印加で数１０
０Ｃｄ／ ｍの輝度を得ている。また、最大発光効率は
１．５ｊ！ｍ／Ｗと、実用レベルに近い性能を持ってい
る。However, recently, a new type of organic thin film EL device with a two-layered organic thin film structure has been reported and is attracting strong interest (Applied Physics Letters, Vol. 51, 9).
(See page 13, 1981). According to reports, this organic thin film element uses a metal chelate mirror that emits strong fluorescence for the organic phosphor thin film layer 24, as shown in FIG. It is disclosed that bright green light emission was obtained by using the hole injection layer 23 to form a two-layer structure and sandwiching these between the transparent electrode 22 and the back electrode 25, and by applying a DC voltage of 6 to 7 μm. number 10
A brightness of 0 Cd/m is obtained. Also, the maximum luminous efficiency is 1.5j! m/W, which has performance close to the practical level.
［発明が解決しようとする課題］
前述したように、有機蛍光体＊ｍと有機物の正孔注入層
とが２層積層した構造を有する新しい有機薄膜ＥＬ素子
は、最大発光輝度が１０００ Ｃｄ／ ｍ以上の明るい
緑色発光を示す。この素子は電流駆動型であるために、
上記の輝度を得るためには１００ｍＡ／ ｃｍ２以上の
電流を流さなければならない。[Problems to be Solved by the Invention] As mentioned above, a new organic thin film EL element having a two-layer structure of an organic phosphor*m and an organic hole injection layer has a maximum luminance of 1000 Cd/m. It emits bright green light. Since this element is current-driven,
In order to obtain the above brightness, a current of 100 mA/cm2 or more must be passed.
しかし、従来使用していた有機物の正孔注入層では安定
して充分な電流を流すことができなかつた。これは通電
とともに正孔注入層が劣化し、その結果、正孔が有機蛍
光体層に注入されにくくなるためでおる。また、電力損
（ジュール熱）の増大で、素子の発光効率低下を招いて
いた。更に、この有機薄膜ＥＬ素子のジュール熱で発光
輝度の劣化速度が加速されていた。However, the conventionally used organic hole injection layer was unable to stably flow a sufficient current. This is because the hole injection layer deteriorates as electricity is applied, and as a result, it becomes difficult for holes to be injected into the organic phosphor layer. In addition, an increase in power loss (Joule heat) causes a decrease in the luminous efficiency of the device. Furthermore, the Joule heat of this organic thin film EL element accelerated the rate of deterioration of the luminance.
本発明は、以上述べたような従来の事情に鑑みてなされ
たもので、素子発光効率が向上し、発光Ｒ度の劣化速度
が低下した有機薄膜ＥＬ素子を提供することを目的とす
る。The present invention has been made in view of the conventional circumstances as described above, and an object of the present invention is to provide an organic thin film EL device with improved device luminous efficiency and a reduced rate of deterioration of luminous R degree.
［課題を解決するための手段］
本発明は、少なくとも一方が透明である一対の電極間に
、少なくとも有機正孔注入層と有機蛍光体薄膜層が積層
されてなる有機薄膜ＥＬ素子において、有機正孔注入層
が、一般式；
（式中、Ｒ１およびＲ２はそれぞれ同一でも異なってい
てもよく、アルキル基、アリール基、シクロアルキル基
、置換アルキル基、置換アリール基、置換シクロアルキ
ル基またはフルコキシ基を示す）の１種または２種以上
を構造単位として有するポリシリレン化合物を含む有機
正孔伝導性薄膜からなることを特徴とする有機薄膜ＥＬ
素子である。[Means for Solving the Problems] The present invention provides an organic thin film EL device in which at least an organic hole injection layer and an organic phosphor thin film layer are laminated between a pair of electrodes, at least one of which is transparent. The pore injection layer has the general formula; An organic thin film EL comprising an organic hole-conducting thin film containing a polysilylene compound having one or more of the following as a structural unit:
It is element.
本発明で用いられるポリシリレン化合物は、平均分子量
が３０．０００〜８０，０００．重合度が２００〜６０
０のものが好ましい。The polysilylene compound used in the present invention has an average molecular weight of 30,000 to 80,000. Degree of polymerization is 200-60
0 is preferred.
また、ポリシリレン化合物の具体的な例としては、ポリ
（メチルフェニルシリレン）、ポリ（メチルフェニルシ
リレンーコージメチルシリレン）、ポリ（シクロヘキシ
ルメチルシリレン）、ポリ（ｔ−ブチルメチルシリレン
）、ポリ（フェニルエチルシリレン）、ポリ（ｎ−プロ
ピルメチルシリレン）、ポリ（ｐ−トリルメチルシリレ
ン）、ポリ（シクロトリメチレンシリレン）、ポリ（シ
クロテトラメチレンシリレン）、ポリ（シクロペンタメ
チレンシリレン）、ポリ（ジーｔ−プチルシリレンーコ
ージメチルシリレン）、ポリ（ジフェニルシリレンーコ
ージメチルシリレン）、ポリ（シアノエチルメチルシリ
レン）、ポリ（２−アセトキシエチルメチルシリレン）
、ポリ（２−カルボメトキシエチルメチルシリレン）、
ポリ（フェニルメチルシリレン）等がある。有機正孔伝
導性薄膜中には、上記のポリシリレン化合物の他に、例
えば、１．１−ビス（４−ジ−ｏ−トリルアミノフェニ
ル）シクロヘキサン、４，４゛−ビス（ジフェニルアミ
ノ）クオドリフェニル、Ｎ、Ｎ、Ｎ−トリス（ｐ−トリ
ル）アミン、オフサジアゾール等を適当な割合で混合し
たものでもよい。有機正孔伝導性薄膜の膜厚は１００八
以上であることが好ましい。Further, specific examples of polysilylene compounds include poly(methylphenylsilylene), poly(methylphenylsilylene-kodimethylsilylene), poly(cyclohexylmethylsilylene), poly(t-butylmethylsilylene), poly(phenylethyl silylene), poly(n-propylmethylsilylene), poly(p-tolylmethylsilylene), poly(cyclotrimethylenesilylene), poly(cyclotetramethylenesilylene), poly(cyclopentamethylenesilylene), poly(di-t- butylsilylene-cordimethylsilylene), poly(diphenylsilylene-cordimethylsilylene), poly(cyanoethylmethylsilylene), poly(2-acetoxyethylmethylsilylene)
, poly(2-carbomethoxyethylmethylsilylene),
Examples include poly(phenylmethylsilylene). In addition to the above-mentioned polysilylene compound, the organic hole-conducting thin film contains, for example, 1,1-bis(4-di-o-tolylaminophenyl)cyclohexane, 4,4'-bis(diphenylamino)quadrion, etc. A mixture of phenyl, N, N, N-tris(p-tolyl)amine, ofthadiazole, etc. in an appropriate ratio may also be used. The thickness of the organic hole-conducting thin film is preferably 100 mm or more.
本発明による有機薄膜ＥＬ素子は、第１図にその基本的
構成を示すように、透明なガラス基板１上に、透明でか
つ正孔注入電極であるＩＴＯ透明電極２が形成され、該
電極上に有機正孔注入層としてポリシリレン薄膜層３が
形成され、ＩＴＯ透明電極２からの正孔注入効率および
正孔注入層内の輸送効率が高められている。ポリシリレ
ン薄膜層３上には有機蛍光体薄膜層４および背面電極５
が形成されて本発明の有機薄膜Ｅし素子が構成されてい
る。また、本発明の有機薄膜ＥＬ素子は、有機蛍光体薄
膜と背面電極の間に有機電子注入層を設置した、いわゆ
る３層構造の有機簿膜ＥＬ素子であってもよい。As shown in FIG. 1, the basic structure of the organic thin film EL device according to the present invention is such that an ITO transparent electrode 2, which is transparent and serves as a hole injection electrode, is formed on a transparent glass substrate 1. A polysilylene thin film layer 3 is formed as an organic hole injection layer to improve hole injection efficiency from the ITO transparent electrode 2 and transport efficiency within the hole injection layer. An organic phosphor thin film layer 4 and a back electrode 5 are disposed on the polysilylene thin film layer 3.
is formed to constitute the organic thin film element of the present invention. Further, the organic thin film EL device of the present invention may be an organic thin film EL device having a so-called three-layer structure in which an organic electron injection layer is provided between an organic phosphor thin film and a back electrode.
本発明による有機薄膜ＥＬ素子は、従来のものに比べ、
効率は２から５倍改善される。また、従来よりも発光効
率が改善されただけ、ジュール熱の発生量が少なくなり
、この結果、素子の発熱に伴う発光特性の劣化も少なく
なる。The organic thin film EL device according to the present invention has the following features compared to conventional ones:
Efficiency is improved by a factor of 2 to 5. Further, as the luminous efficiency is improved over the conventional device, the amount of Joule heat generated is reduced, and as a result, deterioration of the luminous properties due to heat generation of the element is also reduced.
［作用］
２層構造の有機薄膜Ｅ「素子の発光メカニズムは次のよ
うであると考えられている。即ち、ＩＴＱ等の正孔注入
電極から正孔注入層に正孔が注入され、その層を伝導し
て有機蛍光体薄膜層に正孔が注入される。一方、仕事関
数の低い金属を主体とした電子注入電極から電子が有機
蛍光体薄膜層に注入される。注入された電子は有機蛍光
体薄膜層を伝導し、正孔注入層との界面で正孔と再結合
して一重項励起子を生成する。この結果、有機蛍光体層
より発光が生じる。[Operation] The light emitting mechanism of the two-layer organic thin film E device is thought to be as follows. In other words, holes are injected from the hole injection electrode such as ITQ into the hole injection layer, and the layer Holes are injected into the organic phosphor thin film layer by conduction of It conducts through the phosphor thin film layer and recombines with holes at the interface with the hole injection layer to generate singlet excitons.As a result, light is emitted from the organic phosphor layer.
有機薄膜ＥＬ素子の発光効率を向上させるには、電荷注
入効率、電荷の輸送効率、励起子生成および発光遷移確
率を高めることが重要である。特に素子の印加電圧が高
くなると有機蛍光体薄膜層と正孔注入層の界面での再結
合、即ち励起子生成効率が低下するので低電圧で正孔の
注入および輸送効率を改善させることが重要である。従
来の素子で特に問題であった点は、通電とともに有機正
孔注入層が劣化し、その結果、正札の注入および輸送効
率が低下したことである。その結果、正孔注入層の抵抗
が増大し、このことが駆動電圧の上昇およびジュール熱
の増大などの問題を引き起こすことになる。In order to improve the luminous efficiency of organic thin film EL devices, it is important to increase charge injection efficiency, charge transport efficiency, exciton generation, and luminescence transition probability. In particular, as the voltage applied to the device increases, recombination at the interface between the organic phosphor thin film layer and the hole injection layer, that is, exciton generation efficiency, decreases, so it is important to improve hole injection and transport efficiency at low voltages. It is. A particular problem with conventional devices is that the organic hole injection layer deteriorates with electricity, resulting in reduced injection and transport efficiency of the tag. As a result, the resistance of the hole injection layer increases, which causes problems such as an increase in driving voltage and an increase in Joule heat.
本発明においては、有機正孔注入層の材料としてポリシ
リレン化合物薄膜を用いることにより、正孔の注入効率
および正孔注入層内の輸送効率が高められ、その結果、
良好な特性を有する有機薄膜ＥＬ素子を得ることができ
る。In the present invention, by using a polysilylene compound thin film as the material for the organic hole injection layer, the hole injection efficiency and the transport efficiency within the hole injection layer are increased, and as a result,
An organic thin film EL device having good characteristics can be obtained.
［実施例］ 次に本発明の実施例について詳細に説明する。[Example] Next, embodiments of the present invention will be described in detail.
第１図は本発明の一実施例の概略断面図である。FIG. 1 is a schematic sectional view of an embodiment of the present invention.
第１図に示すように、ガラス基板１上にＩＴＯ透明電極
２を形成してからポリ（メチルフェニルシリレン）約６
０重量％にＮ、Ｎ、Ｎ’、Ｎ−テトラフェニル−４，４
−ジアミノビフェニルを約４０重量％混合したポリシリ
レン薄膜層３を１５００人、トルエン溶媒を使用したデ
イツプコーティング法で形成した。その後、有は蛍光体
薄膜層４を５００人、１叶６ 丁ｏｒｒの真空中で蒸着
して形成した。ここで、有機蛍光体としては、トリス（
８−ハイドロキシキノリン）アルミニウムを用いた。最
後に、ＭｇとＡｇを１０：１で混合した合金の背面金属
電極５を電子ビーム蒸着法で１５００人形成して有機薄
膜ＥＬ素子が完成する。As shown in FIG. 1, after forming an ITO transparent electrode 2 on a glass substrate 1, about 6
0% by weight of N, N, N', N-tetraphenyl-4,4
A polysilylene thin film layer 3 containing about 40% by weight of -diaminobiphenyl was formed by 1,500 people by a dip coating method using a toluene solvent. Thereafter, a phosphor thin film layer 4 was formed by vapor deposition by 500 people in a vacuum of 1 6 mm. Here, as the organic phosphor, Tris (
8-hydroxyquinoline) aluminum was used. Finally, 1,500 back metal electrodes 5 made of an alloy of Mg and Ag mixed at a ratio of 10:1 are formed by electron beam evaporation to complete the organic thin film EL device.
この素子の発光特性を乾燥窒素中で測定したところ、約
８ｖの直流電圧の印加で３００ｃｄ／ ′ｒＩｉの発光
が得られた。従来の素子に比べ、発光輝度・効率が２か
ら５倍改善されている。この有機薄膜ＥＬ素子を電流密
度０．５ｍＡ／Ｃｍ２の状態でエージング試験をしたと
ころ、輝度半減時間は１ｏｏｏ時間以上であった。従来
の素子では１００から３００時間であったから、この素
子の信頼性は大幅に改善されている。When the luminescent properties of this device were measured in dry nitrogen, a luminescence of 300 cd/'rIi was obtained when a DC voltage of about 8 V was applied. Compared to conventional elements, luminance and efficiency are improved by 2 to 5 times. When this organic thin film EL element was subjected to an aging test at a current density of 0.5 mA/Cm2, the luminance half-life time was more than 100 hours. The reliability of this device is significantly improved compared to 100 to 300 hours for conventional devices.
なお、ポリ（メチルフェニルシリレンーコージメチルシ
リレン）等のみを単独で用い、アミン類を混合していな
いポリシリレン薄膜でも同様な効果が認められた。A similar effect was also observed in a polysilylene thin film using only poly(methylphenylsilylene-cordimethylsilylene) or the like without mixing amines.
また、本発明の素子はトリス（８−ハイドロキシキノリ
ン）アルミニウム有機蛍光体を用いた場合ばかりでなく
、他の有機蛍光体を用いた場合でも同様な効果が認めら
れた。透明電極はＩＴＯ以外にＳｎＯ２：３ｂＳＺｎＯ
：Ａｊ！やＡＵなどでもよい。Further, in the device of the present invention, similar effects were observed not only when tris(8-hydroxyquinoline)aluminum organic phosphor was used, but also when other organic phosphors were used. The transparent electrode is made of SnO2:3bSZnO in addition to ITO.
:Aj! or AU may be used.
このように本発明で重要な点は、透明な正孔注入層とし
てポリシリレン化合物を含む材料よりなる薄膜を用いる
ことを特徴とした有機薄膜ＥＬ素子であり、正孔注入層
以外の素子を構成する材料そのものを限定するものでは
ない。As described above, an important point of the present invention is an organic thin film EL device characterized in that a thin film made of a material containing a polysilylene compound is used as a transparent hole injection layer, and the elements other than the hole injection layer are The material itself is not limited.
［発明の効果］
以上説明したように、本発明によれば発光特性および信
頼性が大幅に改善された有機薄膜ビし素子が提供される
。[Effects of the Invention] As explained above, according to the present invention, an organic thin film display element with significantly improved light emission characteristics and reliability is provided.
このように、本発明により有機薄膜ＥＬ素子を実用レベ
ルまで引き上げることができ、その工業的価値は高い。As described above, the present invention makes it possible to raise the organic thin film EL device to a practical level, and its industrial value is high.
第１図は本発明の一実施例の概略断面図、第２図は従来
の有機簿膜ＥＬ素子の概略断面図である。
１．２１・・・ガラス基板
２．２２・・・ＩＴＯ透明電極
３・・・ポリシリレン薄膜層
４．２４・・・有機蛍光体薄Ｖ層
５．２５・・・背面電極
２３・・・有機正孔注入層FIG. 1 is a schematic sectional view of an embodiment of the present invention, and FIG. 2 is a schematic sectional view of a conventional organic film EL device. 1.21...Glass substrate 2.22...ITO transparent electrode 3...Polysilylene thin film layer 4.24...Organic phosphor thin V layer 5.25...Back electrode 23...Organic positive pore injection layer
Claims (1)
なくとも有機正孔注入層と有機蛍光体薄膜層が積層され
てなる有機薄膜ＥＬ素子において、有機正孔注入層が、
一般式； ▲数式、化学式、表等があります▼ （式中、Ｒ＾１およびＲ＾２はそれぞれ同一でも異なつ
ていてもよく、アルキル基、アリール基、シクロアルキ
ル基、置換アルキル基、置換アリール基、置換シクロア
ルキル基またはアルコキシ基を示す） の１種または２種以上を構造単位として有するポリシリ
レン化合物を含む有機正孔伝導性薄膜からなることを特
徴とする有機薄膜ＥＬ素子。(1) In an organic thin film EL device in which at least an organic hole injection layer and an organic phosphor thin film layer are laminated between a pair of electrodes, at least one of which is transparent, the organic hole injection layer
General formula; ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (In the formula, R^1 and R^2 may be the same or different, and represent an alkyl group, an aryl group, a cycloalkyl group, a substituted alkyl group, a substituted alkyl group, etc.) 1. An organic thin film EL device comprising an organic hole conductive thin film containing a polysilylene compound having one or more of the following as a structural unit: an aryl group, a substituted cycloalkyl group, or an alkoxy group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1020792A JP2727620B2 (en) | 1989-02-01 | 1989-02-01 | Organic thin film EL device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1020792A JP2727620B2 (en) | 1989-02-01 | 1989-02-01 | Organic thin film EL device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02204996A true JPH02204996A (en) | 1990-08-14 |
| JP2727620B2 JP2727620B2 (en) | 1998-03-11 |
Family
ID=12036932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1020792A Expired - Lifetime JP2727620B2 (en) | 1989-02-01 | 1989-02-01 | Organic thin film EL device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2727620B2 (en) |
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