JPH08193191A - Organic electroluminescent element and organic thin film - Google Patents

Organic electroluminescent element and organic thin film

Info

Publication number
JPH08193191A
JPH08193191A JP7006254A JP625495A JPH08193191A JP H08193191 A JPH08193191 A JP H08193191A JP 7006254 A JP7006254 A JP 7006254A JP 625495 A JP625495 A JP 625495A JP H08193191 A JPH08193191 A JP H08193191A
Authority
JP
Japan
Prior art keywords
layer
group
organic
compound
hole
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
Application number
JP7006254A
Other languages
Japanese (ja)
Other versions
JP3306735B2 (en
Inventor
Hisayuki Kawamura
久幸 川村
Hiroaki Nakamura
浩昭 中村
Chishio Hosokawa
地潮 細川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Kosan Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Priority to JP00625495A priority Critical patent/JP3306735B2/en
Priority to DE69617639T priority patent/DE69617639T2/en
Priority to EP96900715A priority patent/EP0805143B1/en
Priority to CNB961915277A priority patent/CN1152607C/en
Priority to PCT/JP1996/000082 priority patent/WO1996022273A1/en
Priority to US08/860,927 priority patent/US6074734A/en
Publication of JPH08193191A publication Critical patent/JPH08193191A/en
Application granted granted Critical
Publication of JP3306735B2 publication Critical patent/JP3306735B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Luminescent Compositions (AREA)

Abstract

PURPOSE: To obtain an organic electroluminescent element having little risk of dielectric breakdown even after long-term storage and a markedly improved luminous efficiency by making the hole injection layer of a specified triamine compound and to provide an organic thin film desirably usable for this element. CONSTITUTION: This element is composed of an organic compound layer essentially consisting of a hole transport region layer and a luminous region layer and a pair of electrodes between which the organic compound layer is sandwiched. The hole transport region layer essentially consists of a hole injection layer and a hole transport layer, and the hole injection layer is made of a compound represented by formula I (wherein Ar<1> to Ar<5> are each unsubstituted or alkyl-, alkoxyl-, vinyl- or styryl-substituted 6-19C aromatic group) and is contiguous to the anode. It is desirable that the hole transport layer is made of a compound represented by a compound of formula II (wherein X is a single bond, methylene or the like; and Ar<6> to Ar<10> are as defined in formula I).

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は有機電界発光素子及び有
機薄膜に関し、さらに詳しくは、正孔注入層に特定のト
リアミン化合物を用いることにより、長期間保存しても
絶縁破壊のおそれが少なく、かつ著しく発光効率を高め
た有機電界発光素子、及びこの素子や電子写真感光体な
どに好適に用いられる正孔注入・輸送性に極めて優れる
有機薄膜に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescent device and an organic thin film, and more specifically, by using a specific triamine compound in a hole injection layer, there is little risk of dielectric breakdown even when stored for a long period of time. In addition, the present invention relates to an organic electroluminescent device having remarkably improved luminous efficiency, and an organic thin film excellent in hole injecting / transporting property, which is suitably used for this device and an electrophotographic photoreceptor.

【0002】[0002]

【従来の技術】電界発光を利用した電界発光素子は、自
己発光のため視認性が高く、かつ完全固体素子であるた
め、耐衝撃性に優れるなどの特徴を有することから、各
種表示装置における発光素子としての利用が注目されて
いる。この電界発光素子には、発光材料に無機化合物を
用いてなる無機電界発光素子と有機化合物を用いてなる
有機電界発光素子とがあり、このうち、有機電界発光素
子は、印加電圧を大幅に低くしうるために、次世代の表
示素子としてその実用化研究が積極的になされている。
この有機電界発光素子の構成については、陽極/発光層
/陰極の構成を基本とし、これに正孔注入輸送層や電子
注入輸送層を適宜設けたもの、例えば陽極/正孔注入輸
送層/発光層/陰極や、陽極/正孔注入輸送層/発光層
/電子注入輸送層/陰極などの構成のものが知らされて
いる。該正孔注入輸送層は、陽極より注入された正孔を
発光層に伝達する機能を有し、また、電子注入輸送層は
陰極より注入された電子を発光層に伝達する機能を有し
ている。そして、該正孔注入輸送層を発光層と陽極との
間に介在させることによって、より低い電界で多くの正
孔が発光層に注入され、さらに、発光層に陰極又は電子
注入輸送層より注入された電子は、正孔注入輸送層が電
子を輸送しないので、正孔注入輸送層と発光層との界面
に蓄積され発光効率が上がることが知られている。
2. Description of the Related Art An electroluminescent device utilizing electroluminescence has high visibility because it is self-luminous and is a solid-state device, so that it has excellent impact resistance. Attention is being paid to its use as an element. This electroluminescent element includes an inorganic electroluminescent element using an inorganic compound as a light emitting material and an organic electroluminescent element using an organic compound. Among them, the organic electroluminescent element has a significantly low applied voltage. Therefore, the practical use of the display device is being actively researched as a next-generation display device.
The structure of this organic electroluminescent device is based on the structure of anode / light emitting layer / cathode, and is provided with a hole injecting / transporting layer and an electron injecting / transporting layer as appropriate, for example, anode / hole injecting / transporting layer / light emitting. Layers / cathodes and anodes / hole injecting / transporting layers / light emitting layers / electron injecting / transporting layers / cathodes are known. The hole injecting and transporting layer has a function of transmitting holes injected from the anode to the light emitting layer, and the electron injecting and transporting layer has a function of transmitting electrons injected from the cathode to the light emitting layer. There is. By interposing the hole injecting and transporting layer between the light emitting layer and the anode, many holes are injected into the light emitting layer at a lower electric field, and further injected into the light emitting layer from the cathode or the electron injecting and transporting layer. It is known that the generated electrons are accumulated at the interface between the hole injecting and transporting layer and the light emitting layer because the hole injecting and transporting layer does not transport the electrons, and the luminous efficiency is improved.

【0003】ところで、このような有機電界発光素子
は、有機化合物からなる超薄膜が用いられているため、
長期間保存しておくと、該薄膜が結晶化し、絶縁破壊を
もたらすという問題があった。従来、有機電界発光素子
においては、陽極との界面に、正孔注入材料として、一
般にフタロシアニン系材料が使用されているが、このも
のは該素子に用いられる有機化合物の中でも特に結晶化
しやすく、これに代わるアモルファス性の高い正孔注入
材料の開発が望まれていた。そこで、このような要望に
こたえるために、素子の絶縁破壊を抑制する正孔注入材
料として、デンドリマー型アミンを用いる技術が提案さ
れたが(特開平4−308688号公報)、この場合、
得られる素子の発光効率が低いという問題があった。ま
たオリゴマー型有機半導体を正孔注入材料として用いる
技術も開示されている(欧州特許第439627号明細
書)。しかしながら、この技術においても、得られる素
子の発光効率が低く、実用には適さなかった。
By the way, since such an organic electroluminescence device uses an ultrathin film made of an organic compound,
When stored for a long period of time, there is a problem that the thin film crystallizes and causes dielectric breakdown. Conventionally, in an organic electroluminescent device, a phthalocyanine-based material is generally used as a hole injecting material at the interface with the anode, but this is particularly easily crystallized among organic compounds used in the device. It has been desired to develop a hole-injecting material having a high amorphous property, which is an alternative to. Therefore, in order to meet such a demand, a technique of using a dendrimer type amine as a hole injecting material for suppressing the dielectric breakdown of the device has been proposed (Japanese Patent Laid-Open No. 4-308688), but in this case,
There is a problem that the luminous efficiency of the obtained device is low. Also disclosed is a technique of using an oligomer type organic semiconductor as a hole injection material (European Patent No. 439627). However, even with this technique, the luminous efficiency of the obtained device was low, and it was not suitable for practical use.

【0004】[0004]

【発明が解決しようとする課題】本発明は、このような
状況下で、正孔注入材料として結晶化しにくいものを用
い、長期間保存しても絶縁破壊のおそれが少なく、かつ
発光効率を著しく高めた有機電界発光素子、及びこの素
子や電子写真感光体などに好適に用いられる正孔注入・
輸送性に極めて優れる有機薄膜を提供することを目的と
するものである。
Under these circumstances, the present invention uses a hole-injecting material that is difficult to crystallize, has a low risk of dielectric breakdown even when stored for a long period of time, and has a remarkable luminous efficiency. Enhanced organic electroluminescent device and hole injection suitable for use in this device, electrophotographic photoreceptor, etc.
It is an object of the present invention to provide an organic thin film having extremely excellent transportability.

【0005】[0005]

【課題を解決するための手段】本発明者らは、前記目的
を達成するために鋭意研究を重ねた結果、正孔注入材料
として特定のトリアミン化合物を用いた有機電界発光素
子は、長期間保存しても絶縁破壊のおそれが少なく、か
つ発光効率が著しく高いことを見出した。また、該特定
のトリアミン化合物を含有する所定の厚さの層と特定の
化合物を含有する所定の厚さの層との二層からなる有機
薄膜は、正孔注入・輸送性に極めて優れることを見出し
た。本発明は、かかる知見に基づいて完成したものであ
る。すなわち、本発明は、正孔輸送帯域層及び発光帯域
層を少なくとも含む有機化合物化合物層と、この有機化
合物層を挟持する一対の電極とを備えた有機電界発光素
子において、上記正孔輸送帯域層が少なくとも正孔注入
層と正孔輸送層とからなり、かつ該正孔注入層が、一般
式(I)
Means for Solving the Problems As a result of intensive studies to achieve the above-mentioned object, the present inventors have found that an organic electroluminescence device using a specific triamine compound as a hole injection material can be stored for a long period of time. However, it has been found that there is little risk of dielectric breakdown and the luminous efficiency is extremely high. Further, an organic thin film composed of two layers, a layer having a predetermined thickness containing the specific triamine compound and a layer having a predetermined thickness containing the specific compound, is extremely excellent in hole injection / transport properties. I found it. The present invention has been completed based on such findings. That is, the present invention is an organic electroluminescent device comprising an organic compound compound layer including at least a hole transporting band layer and an emission banding layer, and a pair of electrodes sandwiching the organic compound layer, wherein the hole transporting band layer is Is at least a hole injection layer and a hole transport layer, and the hole injection layer has the general formula (I)

【0006】[0006]

【化4】 [Chemical 4]

【0007】〔式中、Ar1 〜Ar5 は、それぞれ無置
換又はアルキル基,アルコキシ基,ビニル基若しくはス
チリル基で置換された炭素数6〜18の芳香族基を示
し、それらはたがいに同一でも異なっていてもよい。〕
で表される化合物を含有するものであって、陽極と接し
ていることを特徴とする有機電界発光素子を提供するも
のである。また、本発明は、上記一般式(I)で表され
る化合物を含有する厚さ5nm〜5μmの層と、一般式
(II)
[In the formula, Ar 1 to Ar 5 each represent an aromatic group having 6 to 18 carbon atoms which is unsubstituted or substituted by an alkyl group, an alkoxy group, a vinyl group or a styryl group, and they are the same in each case. But it can be different. ]
The present invention provides an organic electroluminescent device, which comprises a compound represented by the formula (1) and is in contact with an anode. The present invention also provides a layer having a thickness of 5 nm to 5 μm, containing a compound represented by the general formula (I), and a general formula (II).

【0008】[0008]

【化5】 Embedded image

【0009】〔式中、Xは単結合,メチレン基,フェニ
レン基,ビフェニレン基,−O−,−S−又は
[Wherein X is a single bond, a methylene group, a phenylene group, a biphenylene group, -O-, -S- or

【0010】[0010]

【化6】 [Chemical 6]

【0011】で表される基を示す。Ar6 〜Ar10は、
それぞれ無置換又はアルキル基,アルコキシ基,ビニル
基若しくはスチリル基で置換された炭素数6〜18の芳
香族基を示し、それらはたがいに同一でも異なっていて
もよい。〕で表される化合物を含有する厚さ5nm〜5
μmの層との二層からなる有機薄膜をも提供するもので
ある。本発明の有機電界発光素子は、正孔輸送帯域層及
び発光帯域層を少なくとも含む有機化合物層と、この有
機化合物層を挟持する一対の電極、すなわち陽極及び陰
極とを備えた素子である。この有機電界発光素子におけ
る陽極は、素子中に正孔を注入するための電極であり、
この陽極としては、仕事関数の大きい(4eV以上)金
属,合金,電気伝導性化合物及びこれらの混合物を電極
物質とするものが好ましく用いられる。このような電極
物質の具体例としてはAuなどの金属,CuI,IT
O,SnO2,ZnOなどの導電性透明材料が挙げられ
る。この陽極は、例えばこれらの電極物質を蒸着やスパ
ッタリングなどの方法により、薄膜を形成させることに
より作製することができる。この電極より発光を取り出
す場合には、透過率を10%より大きくすることが望ま
しく、また、電極としてのシート抵抗は数百Ω/□以下
が好ましい。さらに膜厚は材料にもよるが、通常500
nm以下、好ましくは10〜200nmの範囲で選ばれ
る。
A group represented by Ar 6 to Ar 10 are
Each of them represents an aromatic group having 6 to 18 carbon atoms which is unsubstituted or substituted by an alkyl group, an alkoxy group, a vinyl group or a styryl group, and they may be the same or different. ] The thickness 5 nm-5 containing the compound represented by
It also provides an organic thin film consisting of two layers with a layer of μm. The organic electroluminescent element of the present invention is an element including an organic compound layer including at least a hole transporting band layer and an emission banding layer, and a pair of electrodes sandwiching the organic compound layer, that is, an anode and a cathode. The anode in this organic electroluminescent device is an electrode for injecting holes into the device,
As the anode, one having a high work function (4 eV or more) metal, alloy, electrically conductive compound, or a mixture thereof as an electrode substance is preferably used. Specific examples of such an electrode material include metals such as Au, CuI, and IT.
Conductive transparent materials such as O, SnO 2 and ZnO are mentioned. This anode can be produced by forming a thin film of these electrode substances by a method such as vapor deposition or sputtering. When the emitted light is taken out from this electrode, it is desirable that the transmittance is higher than 10%, and the sheet resistance as an electrode is preferably several hundred Ω / □ or less. The film thickness depends on the material, but is usually 500.
nm or less, preferably 10 to 200 nm.

【0012】一方、陰極は、素子中に電子を注入するた
めの電極であり、この陰極としては、仕事関数の小さい
(4eV以下)金属,合金,電気伝導性化合物及びこれ
らの混合物を電極物質とするものが用いられる。このよ
うな電極物質の具体例としては、ナトリウム,ナトリウ
ム−カリウム合金,マグネシウム,アルミニウム,リチ
ウム,マグネシウム/銅混合物,アルミニウム−リチウ
ム合金,Al/Al23 混合物,インジウム,イッテ
ルビウムなどが挙げられる。この陰極は、例えばこれら
の電極物質を蒸着やスパッタリングなどの方法により、
薄膜を形成させることにより、作製することができる。
この電極より発光を取り出す場合には、透過率を10%
より大きくすることが望ましく、また電極としてのシー
ト抵抗は数百Ω/口以下が好ましい。さらに膜厚は材料
にもよるが、通常500nm以下、好ましくは10〜2
00nmの範囲で選ばれる。なお、本発明の素子におい
ては、上記陽極又は陰極のいずれか一方を透明又は半透
明にしておくことが好ましい。これにより発光を効率よ
く透過させ、取り出すことが可能となる。本発明の有機
電界発光素子において、正孔輸送帯域とは、104 〜1
6 V/cmの電界印加時に通常10-6cm2 /V・s
以上の正孔移動度を有する帯域のことを指す。本発明に
おいては、この正孔輸送帯域層は、少なくとも正孔注入
層と正孔輸送層とからなるものであって、該正孔注入層
は、一般式(I)
On the other hand, the cathode is an electrode for injecting electrons into the device. As the cathode, a metal, an alloy, an electrically conductive compound and a mixture thereof having a low work function (4 eV or less) are used as an electrode material. What is done is used. Specific examples of such electrode materials include sodium, sodium-potassium alloy, magnesium, aluminum, lithium, magnesium / copper mixture, aluminum-lithium alloy, Al / Al 2 O 3 mixture, indium, ytterbium and the like. This cathode, for example, by a method such as vapor deposition or sputtering of these electrode substances,
It can be produced by forming a thin film.
When taking out light emission from this electrode, the transmittance is 10%.
It is desirable to make it larger, and the sheet resistance as an electrode is preferably several hundred Ω / hole or less. Further, the film thickness depends on the material, but is usually 500 nm or less, preferably 10 to 2
It is selected in the range of 00 nm. In the device of the present invention, it is preferable that either the anode or the cathode is transparent or semitransparent. This allows the emitted light to be efficiently transmitted and taken out. In the organic electroluminescent device of the present invention, the hole transport band is 10 4 to 1
Usually 10 -6 cm 2 / Vs when an electric field of 0 6 V / cm is applied
It refers to a band having the above hole mobility. In the present invention, this hole-transporting zone layer comprises at least a hole-injecting layer and a hole-transporting layer, and the hole-injecting layer has the general formula (I).

【0013】[0013]

【化7】 [Chemical 7]

【0014】で表される化合物を主として含有すること
が必要である。上記一般式(I)において、Ar1 〜A
5 は、それぞれ無置換又はアルキル基,アルコキシ
基,ビニル基若しくはスチリル基で置換された炭素数6
〜18の芳香族基を示す。ここで、アルキル基及びアル
コキシ基は炭素数1〜6のものが好ましく、また直鎖
状,分岐状,環状のいずれであってもよい。このアルキ
ル基及びアルコキシ基の具体例としては、メチル,エチ
ル基,n−プロピル基,イソプロピル基.n−ブチル
基,イソブチル基,sec−ブチル基,t−ブチル基,
各種ペンチル基,各種ヘキシル基,シクロペンチル基,
シクロヘキシル基,メトキシ基,エトキシ基,n−プロ
ポキシ基,イソプロポキシ基,n−ブトキシ基,イソブ
トキシ基,sec−ブトキシ基,t−ブトキシ基,各種
ペントキシ基,各種ヘキソキシ基,シクロペントキシ
基,シクロヘキソキシ基などが挙げられる。また、置換
基を有する場合、この置換基は芳香環に一つ導入されて
いてもよく、複数導入されていてもよい。またたがいに
結合し、環を形成してもよい。さらに、芳香族基におけ
る芳香環としては、例えばベンゼン環,ナフタレン環,
アセナフテン環,アントラセン環,フルオレン環,フェ
ナントレン環,ピレン環,ビフェル環などが挙げられ
る。該Ar1 〜Ar5 はたがいに同一でも異なっていて
もよい。上記一般式(I)で表される化合物の具体例を
第1表に示す。
It is necessary to mainly contain the compound represented by: In the general formula (I), Ar 1 to A
r 5 has 6 carbon atoms, each of which is unsubstituted or substituted by an alkyl group, an alkoxy group, a vinyl group or a styryl group.
~ 18 aromatic groups are shown. Here, the alkyl group and the alkoxy group preferably have 1 to 6 carbon atoms, and may be linear, branched or cyclic. Specific examples of the alkyl group and the alkoxy group include methyl, ethyl group, n-propyl group, isopropyl group. n-butyl group, isobutyl group, sec-butyl group, t-butyl group,
Various pentyl groups, various hexyl groups, cyclopentyl groups,
Cyclohexyl group, methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, isobutoxy group, sec-butoxy group, t-butoxy group, various pentoxy groups, various hexoxy groups, cyclopentoxy group, cyclohexyl group Examples include soxy group. When it has a substituent, one or more of the substituent may be introduced into the aromatic ring. Also, they may be bonded to each other to form a ring. Furthermore, examples of the aromatic ring in the aromatic group include a benzene ring, a naphthalene ring,
Examples include acenaphthene ring, anthracene ring, fluorene ring, phenanthrene ring, pyrene ring, and bifel ring. The Ar 1 to Ar 5 may be the same or different. Specific examples of the compound represented by the above general formula (I) are shown in Table 1.

【0015】[0015]

【表1】 [Table 1]

【0016】[0016]

【表2】 [Table 2]

【0017】[0017]

【表3】 [Table 3]

【0018】[0018]

【表4】 [Table 4]

【0019】[0019]

【表5】 [Table 5]

【0020】[0020]

【表6】 [Table 6]

【0021】[0021]

【表7】 [Table 7]

【0022】[0022]

【表8】 [Table 8]

【0023】[0023]

【表9】 [Table 9]

【0024】[0024]

【表10】 [Table 10]

【0025】本発明の有機電界発光素子においては、正
孔注入層に上記一般式(I)で表される化合物を一種含
有させてもよく、二種以上組み合わせて含有させてもよ
い。これにより、効果的な正孔の注入が行われるが、そ
のためには、正孔注入層は陽極と接して存在することが
必要である。また、この正孔注入層の厚さは、通常5n
m〜5 μmの範囲で選ばれる。一方、本発明の有機電界
発光素子における正孔輸送層の材料については特に制限
はなく、通常有機電界発光素子に用いられる正孔輸送材
料を使用することができる。例えばトリアゾール誘導体
(米国特許第3,112,197号明細書などに記載の
もの),オキサジアゾール誘導体(米国特許第3,18
9,447号明細書などに記載のもの),イミダゾール
誘導体,ポリアリールアルカン誘導体,ピラゾリン誘導
体及びピラゾロン誘導体,フェニレンジアミン誘導体,
アリールアミン誘導体,アミノ置換カルコン誘導体,オ
キサゾール誘導体,スチリルアントラセン誘導体,フル
オレノン誘導体,ヒドラゾン誘導体,スチルベン誘導
体、さらにはシラザン誘導体,ポリシラン系,アニリン
系共重合体,導電性高分子ポリマー(特にチオフェンオ
リゴマー)などを挙げることができる。
In the organic electroluminescence device of the present invention, the hole injection layer may contain one kind of the compound represented by the general formula (I), or may contain two or more kinds in combination. Thereby, effective hole injection is performed, but for that purpose, the hole injection layer needs to exist in contact with the anode. The thickness of this hole injection layer is usually 5n.
It is selected in the range of m to 5 μm. On the other hand, the material of the hole transport layer in the organic electroluminescent device of the present invention is not particularly limited, and the hole transport material usually used in organic electroluminescent devices can be used. For example, triazole derivatives (described in US Pat. No. 3,112,197 etc.), oxadiazole derivatives (US Pat. No. 3,18).
9, 447 etc.), imidazole derivative, polyarylalkane derivative, pyrazoline derivative and pyrazolone derivative, phenylenediamine derivative,
Arylamine derivatives, amino-substituted chalcone derivatives, oxazole derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, polysilane-based, aniline-based copolymers, conductive polymer (especially thiophene oligomer), etc. Can be mentioned.

【0026】また、芳香族第三級アミン化合物及びスチ
リルアミン化合物なども用いることができ、その代表例
としては、N,N,N’,N’−テトラフェニル−4,
4’−ジアミノフェニル;N,N’−ジフェニル−N,
N’−ジ(3−メチルフェニル)−4,4’−ジアミノ
ビフェニル(TPDA);2,2−ビス(4−ジ−p−
トリルアミノフェニル)プロパン;1,1−ビス(4−
ジ−p−トリルアミノフェニル)シクロヘキサン;N,
N,N’,N’−テトラ−p−トリル−4,4’−ジア
ミノビフェニル;1,1−ビス(4−ジ−p−トリルア
ミノフェニル)−4−フェニルシクロヘキサン;ビス
(4−ジメチルアミノ−2−メチルフェニル)フェニル
メタン;ビス(4−ジ−p−トリルアミノフェニル)フ
ェニルメタン;N,N’−ジフェニル−N,N’−ジ
(4−メトキシフェニル)−4,4’−ジアミノビフェ
ニル;N,N,N’,N’−テトラフェニル−4,4’
−ジアミノジフェニルエーテル;4,4’−ビス(ジフ
ェニルアミノ)ターフェニル;N,N,N−トリ(p−
トリル)アミン;4,4’−ビス〔4−(ジ−p−トリ
ルアミノ)スチルベン〕;4−N,N−ジフェニルアミ
ノ−(2,2−ジフェニルビニル)ベンゼン;3−メト
キシ−4’−N,N−ジフェニルアミノスチルベン;N
−フェニルカルバゾールなどが挙げられる。本発明にお
いては、この正孔輸送層として、特に一般式(II)
Further, aromatic tertiary amine compounds and styrylamine compounds can also be used, and representative examples thereof include N, N, N ', N'-tetraphenyl-4,
4'-diaminophenyl; N, N'-diphenyl-N,
N'-di (3-methylphenyl) -4,4'-diaminobiphenyl (TPDA); 2,2-bis (4-di-p-
Tolylaminophenyl) propane; 1,1-bis (4-
Di-p-tolylaminophenyl) cyclohexane; N,
N, N ', N'-tetra-p-tolyl-4,4'-diaminobiphenyl; 1,1-bis (4-di-p-tolylaminophenyl) -4-phenylcyclohexane; bis (4-dimethylamino) 2-Methylphenyl) phenylmethane; Bis (4-di-p-tolylaminophenyl) phenylmethane; N, N'-diphenyl-N, N'-di (4-methoxyphenyl) -4,4'-diamino Biphenyl; N, N, N ', N'-tetraphenyl-4,4'
-Diaminodiphenyl ether; 4,4'-bis (diphenylamino) terphenyl; N, N, N-tri (p-
Tolyl) amine; 4,4'-bis [4- (di-p-tolylamino) stilbene]; 4-N, N-diphenylamino- (2,2-diphenylvinyl) benzene; 3-methoxy-4'-N , N-diphenylaminostilbene; N
-Phenylcarbazole and the like. In the present invention, as the hole transport layer, particularly the general formula (II)

【0027】[0027]

【化8】 Embedded image

【0028】で表される化合物を主として含有する層を
用いるのが好ましく、これにより高い発光効率を有する
有機電界発光素子が得られる。上記一般式(II)におい
て、Xは単結合,メチレン基,フェニレン基,ビフェニ
レン基,−O−,−S−又は
It is preferable to use a layer mainly containing the compound represented by the formula (1), whereby an organic electroluminescent device having high luminous efficiency can be obtained. In the general formula (II), X is a single bond, a methylene group, a phenylene group, a biphenylene group, -O-, -S- or

【0029】[0029]

【化9】 [Chemical 9]

【0030】で表される基を示す。ここでフェニレン基
及びビフェニレン基の結合位置については特に制限はな
いが、それぞれ1,4−フェニレン基及び4,4’−ビ
フェニレン基が好ましい。また、Ar6 〜Ar10は、そ
れぞれ無置換又はアルキル基,アルコキシ基,ビニル基
若しくはスチリル基で置換された炭素数6〜18の芳香
族基であり、前期Ar1 〜Ar5 と同様である。該Ar
6 〜Ar10はたがいに同一でも異なっていてもよい。上
記一般式(II)で表される化合物の具体例を第2表に示
す。
A group represented by Here, the bonding positions of the phenylene group and the biphenylene group are not particularly limited, but a 1,4-phenylene group and a 4,4′-biphenylene group are preferable, respectively. Further, Ar 6 to Ar 10 are each an aromatic group having 6 to 18 carbon atoms which is unsubstituted or substituted by an alkyl group, an alkoxy group, a vinyl group or a styryl group, and is the same as the above-mentioned Ar 1 to Ar 5. . The Ar
6 to Ar 10 may be the same or different. Specific examples of the compound represented by the general formula (II) are shown in Table 2.

【0031】[0031]

【表11】 [Table 11]

【0032】[0032]

【表12】 [Table 12]

【0033】[0033]

【表13】 [Table 13]

【0034】[0034]

【表14】 [Table 14]

【0035】[0035]

【表15】 [Table 15]

【0036】[0036]

【表16】 [Table 16]

【0037】[0037]

【表17】 [Table 17]

【0038】[0038]

【表18】 [Table 18]

【0039】[0039]

【表19】 [Table 19]

【0040】[0040]

【表20】 [Table 20]

【0041】[0041]

【表21】 [Table 21]

【0042】[0042]

【表22】 [Table 22]

【0043】本発明の有機電界発光素子においては、正
孔輸送層に、上記化合物を一種含有させてもよく、二種
以上組み合わせて含有させてもよい。また、この正孔輸
送層の厚さは、通常5nm〜5μmの範囲で選ばれる。
次に、本発明の有機電界発光素子において、発光帯域と
は、固体状態で蛍光性を示す分子が、正孔と電子との再
結合によって生じるエネルギーを、直接又は間接的に受
け取って励起状態を形成し、発光を生じる帯域のことで
ある。この固体状態で蛍光性を示す分子については特に
制限はなく、通常有機電界発光素子に用いられる発光材
料を使用することができる。該発光材料としては例え
ば、多環縮合芳香族化合物、ベンゾオキサゾール系,ベ
ンゾチアゾール系,ベンゾイミダゾール系などの蛍光増
白剤、金属キレート化オキサノイド化合物、ジスチリル
ベンゼン系化合物など薄膜形成性の良い化合物を用いる
ことができる。ここで、上記多環縮合芳香族化合物とし
ては、例えばアントラセン,ナフタレン,フェナントレ
ン,ピレン,クリセン,ペリレン骨格を含む縮合環発光
物質などを挙げることができる。
In the organic electroluminescent device of the present invention, the hole transport layer may contain one kind of the above compounds or a combination of two or more kinds thereof. The thickness of the hole transport layer is usually selected in the range of 5 nm to 5 μm.
Next, in the organic electroluminescent device of the present invention, the emission band means a molecule that exhibits fluorescence in the solid state, directly or indirectly receiving energy generated by recombination of holes and electrons to form an excited state. It is a band that forms and emits light. There is no particular limitation on the molecule exhibiting fluorescence in the solid state, and a light emitting material usually used for an organic electroluminescence device can be used. Examples of the light emitting material include polycyclic fused aromatic compounds, benzoxazole-based, benzothiazole-based, benzimidazole-based fluorescent whitening agents, metal chelated oxanoide compounds, distyrylbenzene-based compounds, and other thin-film-forming compounds. Can be used. Here, examples of the above-mentioned polycyclic fused aromatic compound include condensed ring luminescent substances containing anthracene, naphthalene, phenanthrene, pyrene, chrysene, and perylene skeleton.

【0044】上記ベンゾオキサゾール系,ベンゾチアゾ
ール系,ベンゾイミダゾール系などの蛍光増白剤として
は、例えば特開昭59−194393号公報に記載され
ているものを用いることができ、その代表例としては、
2,5−ビス(5,7−ジ−t−ペンチル−2−ベンゾ
オキサゾリル)−1,3,4−チアジアゾール;4,
4’−ビス(5,7−t−ペンチル−2−ベンゾオキサ
ゾリル)スチルベン;4,4’−ビス(5,7−ジ−
(2−メチル−2−ブチル)−2−ベンゾオキサゾリ
ル)スチルベン;2,5−ビス(5,7−ジ−t−ペン
チル−2−ベンゾオキサゾリル)チオフェン;2,5−
ビス(5−(α,α,−ジメチルベンジル)−2−ベン
ゾオキサゾリル)チオフェン;2,5−ビス(5,7−
ジ−(2−メチル−2−ブチル)−2−ベンゾオキサゾ
リル)−3,4−ジフェニルチオフェン;2,5−ビス
(5−メチル−2−ベンゾオキサゾリル)チオフェン;
4,4’−ビス(2−ベンゾオキサゾリル)ビフェニ
ル;5−メチル−2−(2−(4−(5−メチル−2−
ベンゾオキサゾリル)フェニル)ビニル)ベンゾオキサ
ゾール;2−(2−(4−クロロフェニル)ビニル)ナ
フト(1,2−d)オキサゾールなどのベンゾオキサゾ
ール系、2,2’−(p−フェニレンジビニレン)−ビ
スベンゾチアゾールなどのベンゾチアゾール系、2−
(2−(4−(2−ベンゾイミダゾリル)フェニル)ビ
ニル)ベンゾイミダゾール;2−(2−(4−カルボキ
シフェニル)ビニル)ベンゾイミダゾールなどのベンゾ
イミダゾール系などの蛍光増白剤が挙げられる。さら
に、他の有用な化合物としては、「ケミストリー・オブ
・シンセティックダイス」第628〜637ページ,6
40ページ(1971年)に記載のものが挙げられる。
As the above-mentioned fluorescent whitening agents of the benzoxazole type, benzothiazole type, benzimidazole type and the like, for example, those described in JP-A-59-194393 can be used, and representative examples thereof can be used. ,
2,5-bis (5,7-di-t-pentyl-2-benzoxazolyl) -1,3,4-thiadiazole; 4,
4'-bis (5,7-t-pentyl-2-benzoxazolyl) stilbene; 4,4'-bis (5,7-di-
(2-Methyl-2-butyl) -2-benzoxazolyl) stilbene; 2,5-bis (5,7-di-t-pentyl-2-benzoxazolyl) thiophene; 2,5-
Bis (5- (α, α, -dimethylbenzyl) -2-benzoxazolyl) thiophene; 2,5-bis (5,7-
Di- (2-methyl-2-butyl) -2-benzoxazolyl) -3,4-diphenylthiophene; 2,5-bis (5-methyl-2-benzoxazolyl) thiophene;
4,4'-bis (2-benzoxazolyl) biphenyl; 5-methyl-2- (2- (4- (5-methyl-2-
Benzoxazolyl) phenyl) vinyl) benzoxazole; benzoxazoles such as 2- (2- (4-chlorophenyl) vinyl) naphtho (1,2-d) oxazole, 2,2 ′-(p-phenylenedivinylene) ) -Bisbenzothiazole and other benzothiazoles, 2-
Examples thereof include (2- (4- (2-benzimidazolyl) phenyl) vinyl) benzimidazole; 2- (2- (4-carboxyphenyl) vinyl) benzimidazole, and other fluorescent whitening agents such as benzimidazole compounds. Further, other useful compounds include “Chemistry of Synthetic Dice”, pages 628 to 637, 6
Those described on page 40 (1971) can be mentioned.

【0045】上記金属キレート化オキサノイド化合物と
しては、例えば特開昭63−295695号公報に記載
されているものを用いることができる。その代表例とし
ては、トリス(8−キノリノール)アルミニウム,ビス
(8−キノリノール)マグネシウム,ビス(ベンゾ
(f)−8−キノリノール)亜鉛,ビス(2−メチル−
8−キノリノラート)アルミニウムオキシド,トリス
(8−キノリノール)インジウム,トリス(5−メチル
−8−キノリノール)アルミニウム,8−キノリノール
リチウム,トリス(5−クロロ−8−キノリノール)ガ
リウム,ビス(5−クロロ−8−キノリノール)カルシ
ウム,ポリ(亜鉛(II)−ビス(8−ヒドロキシ−5−
キノリノニル)メタン)などの8−ヒドロキシキノリン
系金属錯体やジリチウムエピンドリジオンなどが挙げら
れる。また、米国特許第5,141,671号明細書や
米国特許第5,150,006号明細書に記載されてい
る金属キレート化オキサノイド化合物に多環芳香族化合
物をドープさせたものも用いることができる。この具体
例としては、ビス(2−メチル−8−キノリノラート)
(フェノラート)アルミニウム(III) ,ビス(2−メチ
ル−8−キノリノラート)(クレゾラート)アルミニウ
ム(III) ,ビス(2−メチル−8−キノリノラート)
(フェニルフェノラート)アルミニウム(III) ,ビス
(2−メチル−8−キノリノラート)(ナフトラート)
アルミニウム(III) ,ビス(2−メチル−8−キノリノ
ラート)アルミニウム(III) −μ−オキソ−ビス(2−
メチル−8−キノリノラート)アルミニウム(III) など
の8−ヒドロキシキノリン系金属錯体にペリレンやジベ
ンゾペリレンなどの多環芳香族化合物をドープさせたも
のが挙げられる。
As the metal chelated oxanoide compound, for example, those described in JP-A-63-295695 can be used. Typical examples are tris (8-quinolinol) aluminum, bis (8-quinolinol) magnesium, bis (benzo (f) -8-quinolinol) zinc, bis (2-methyl-).
8-quinolinolato) aluminum oxide, tris (8-quinolinol) indium, tris (5-methyl-8-quinolinol) aluminum, 8-quinolinol lithium, tris (5-chloro-8-quinolinol) gallium, bis (5-chloro-) 8-quinolinol) calcium, poly (zinc (II) -bis (8-hydroxy-5-
Examples thereof include 8-hydroxyquinoline-based metal complexes such as quinolinonyl) methane) and dilithium epindridione. It is also possible to use a metal chelated oxanoide compound described in US Pat. No. 5,141,671 or US Pat. No. 5,150,006 doped with a polycyclic aromatic compound. it can. A specific example of this is bis (2-methyl-8-quinolinolate).
(Phenolato) aluminum (III), bis (2-methyl-8-quinolinolate) (cresolate) aluminum (III), bis (2-methyl-8-quinolinolate)
(Phenylphenolate) aluminum (III), bis (2-methyl-8-quinolinolate) (naphtholate)
Aluminum (III), bis (2-methyl-8-quinolinolato) aluminum (III) -μ-oxo-bis (2-
Examples thereof include 8-hydroxyquinoline-based metal complexes such as methyl-8-quinolinolato) aluminum (III) doped with a polycyclic aromatic compound such as perylene or dibenzoperylene.

【0046】他には、欧州特許第0373582号明細
書に記載のジスチリルベンゼン誘導体,同038876
8号明細書に記載のジメチリデン誘導体、特開平2−1
91694号公報のクマリン誘導体、特開平2−252
793号公報のジスチリルピラジン誘導体、特開平2−
196885号公報のペリレン誘導体、特開平2−25
5789号公報のナフタレン誘導体、特開平2−289
676号公報及び同2−88689号公報のフタロペリ
ノン誘導体、特開平2−250292号公報のスチリル
アミン誘導体及び同2−289675号公報のシクロペ
ンタジエン誘導体、欧州特許第387715号明細書に
記載のポリフェニル系化合物など、目的とする発光色及
び性能などから適宜選択することができる。上記の有機
化合物からなる発光帯域層は、所望に応じて2層以上の
積層構造でもよく、米国特許第4,769,292号明
細書や同5,141,671号明細書に開示されている
ように蛍光物質や多環芳香族化合物を加えて形成しても
よい。この場合上記有機化合物は薄膜状の層であり、発
光帯域の機能である注入機能及び発光機能の一部を受持
ち、一方、蛍光物質はその有機化合物の層の中に微量
(数モル%以下)存在させ、電子と正孔の再結合に応答
して発光するといった発光機能の一部を担っている。こ
の発光帯域層は、これらの発光材料一種又は二種以上か
らなる一層で構成されていてもよく、あるいは別種の化
合物からなる発光材料を積層したものであってもよい。
本発明の有機電界発光素子は、陽極と陰極との間に前期
の正孔輸送帯域層と発光帯域層の他に、必要に応じ、例
えば陰極からの電子注入を効率よくするために、あるい
は陰極との付着性を改善するために、別の層を設けても
よい。
In addition, a distyrylbenzene derivative described in European Patent No. 0373582, No. 0388876.
Dimethylidene derivative described in JP-A No. 2-1.
Coumarin derivative of Japanese Patent No. 91694, JP-A-2-252
Distyrylpyrazine derivatives disclosed in Japanese Patent No. 793, JP-A-2-
Perylene derivatives disclosed in 196885, JP-A 2-25
Naphthalene derivatives disclosed in JP-A-5789, JP-A-2-289
No. 676 and No. 2-88689, phthaloperinone derivatives, Japanese Unexamined Patent Publication No. 2-250292, styrylamine derivatives, and No. 2-289675, cyclopentadiene derivatives, European Patent No. 387715. The compound or the like can be appropriately selected depending on the desired emission color and performance. The emission band layer made of the above organic compound may have a laminated structure of two or more layers as desired, and is disclosed in US Pat. Nos. 4,769,292 and 5,141,671. Thus, it may be formed by adding a fluorescent substance or a polycyclic aromatic compound. In this case, the organic compound is a thin film layer, and is responsible for a part of the injection function and the light emitting function of the emission band, while the fluorescent substance is present in the organic compound layer in a trace amount (several mol% or less). When it is present, it plays a part of the light emitting function of emitting light in response to the recombination of electrons and holes. This light emitting band layer may be composed of a single layer of one or more of these light emitting materials, or may be a laminate of light emitting materials of different types of compounds.
The organic electroluminescent device of the present invention includes, in addition to the hole transporting band layer and the light emitting band layer in the preceding period between the anode and the cathode, if necessary, for example, in order to efficiently inject electrons from the cathode, or the cathode. Additional layers may be provided to improve adhesion with

【0047】次に、本発明の有機電界発光素子を作成す
る好適な例を説明する。まず適当な基板上に、所望の電
極物質、例えば陽極用物質からなる薄膜を、500nm
以下、好ましくは10〜200nmの範囲の膜厚になる
ように、蒸着やスパッタリングなどの方法により形成さ
せ、陽極を作製する。次に、この上に素子材料である正
孔注入層,正孔輸送層,発光帯域層の材料からなる薄膜
を形成させる。この薄膜化の方法としては、スピンコー
ト法,キャスト法,蒸着法などがあるが、均質な膜が得
られやすく、かつピンホールが生成しにくいなどの点か
ら、真空蒸着法が好ましい。この薄膜化に、この蒸着法
を採用する場合、その蒸着条件は、使用する化合物の種
類,分子堆積膜の目的とする結晶構造,会合構造などに
より異なるが、一般にボート加熱温度50〜400℃,
真空度10-6〜10-3Pa,蒸着速度0.01〜50nm
/秒,基板温度−50〜300℃,膜厚5nm〜5μm
の範囲で適宜選ぶことが望ましい。これらの層の形成
後、その上に陰極用物質からなる薄膜を、500nm以
下好ましくは10〜200nmの範囲の膜厚になるよう
に、例えば蒸着やスパッタリングなどの方法により形成
させ、陰極を設けることにより、所望の電界発光素子が
得られる。なお、この電界発光素子の作製においては、
作製順序を逆にして、作製することも可能である。
Next, a preferred example for producing the organic electroluminescent element of the present invention will be described. First, a thin film of a desired electrode material, for example, a material for an anode, of 500 nm is formed on a suitable substrate.
Hereinafter, the anode is formed by a method such as vapor deposition or sputtering so that the film thickness is preferably in the range of 10 to 200 nm. Then, a thin film made of the material of the hole injection layer, the hole transport layer, and the emission band layer, which is the element material, is formed on this. The thinning method includes a spin coating method, a casting method, a vapor deposition method and the like, but a vacuum vapor deposition method is preferable because a uniform film is easily obtained and pinholes are hard to be generated. When this vapor deposition method is used for this thinning, the vapor deposition conditions generally vary depending on the type of compound used, the desired crystal structure of the molecular deposited film, the association structure, etc.
Vacuum degree 10 −6 to 10 −3 Pa, vapor deposition rate 0.01 to 50 nm
/ Sec, substrate temperature −50 to 300 ° C., film thickness 5 nm to 5 μm
It is desirable to appropriately select within the range. After forming these layers, a thin film made of a substance for the cathode is formed thereon by a method such as vapor deposition or sputtering so as to have a film thickness of 500 nm or less, preferably 10 to 200 nm, and the cathode is provided. Thus, a desired electroluminescent device can be obtained. In the production of this electroluminescent element,
It is also possible to reverse the order of production.

【0048】このようにして得られた電界発光素子に、
直流電圧を印加する場合には、陽極を+ ,陰極を−の
極性として電圧3〜40V程度を印加すると、発光が観
測できる。また、逆の極性で電圧を印加しても電流は流
れずに発光は全く生じない。さらに、交流電圧を印加す
る場合には、正極が+,負極が−の状態になったときの
み発光する。なお、印加する交流の波形は任意でよい。
本発明の素子は基板に支持されていることが好ましい。
この基板については特に制限はなく、従来有機電界発光
素子に慣用されているものであればよく、例えばガラ
ス,透明プラスチック,石英などからなるものを用いる
ことができる。本発明はまた、前期一般式(I)で表さ
れる化合物を含有する厚さ5nm〜5μmの層と、一般
式(II)で表される化合物を含有する厚さ5nm〜5μm
の層との二層からなる有機薄膜をも提供するものであ
る。この有機薄膜は、正孔注入・輸送性に極めて優れて
おり、有機電界発光素子に好適に用いられるほか、他の
有機デバイスや電子写真感光体などにも広く使用するこ
とができる。この有機薄膜は、前述した有機電界発光素
子の製造における正孔注入層及び正孔輸送層の作製と同
様な方法により作製することができる。
In the electroluminescent device thus obtained,
When a DC voltage is applied, light emission can be observed by applying a voltage of about 3 to 40 V with the anode having a positive polarity and the cathode having a negative polarity. Moreover, even if a voltage is applied with the opposite polarity, no current flows and no light emission occurs. Furthermore, when an AC voltage is applied, light is emitted only when the positive electrode is in the + state and the negative electrode is in the − state. The waveform of the alternating current applied may be arbitrary.
The device of the present invention is preferably supported on a substrate.
The substrate is not particularly limited as long as it is conventionally used in organic electroluminescent devices, and for example, a substrate made of glass, transparent plastic, quartz or the like can be used. The present invention also provides a layer having a thickness of 5 nm to 5 μm containing the compound represented by the general formula (I) and a thickness of 5 nm to 5 μm containing the compound represented by the general formula (II).
It also provides an organic thin film composed of two layers, i.e. This organic thin film is extremely excellent in hole injecting / transporting property, and is suitably used for an organic electroluminescence device, and can also be widely used for other organic devices and electrophotographic photoreceptors. This organic thin film can be produced by the same method as the production of the hole injection layer and the hole transport layer in the production of the organic electroluminescence device described above.

【0049】[0049]

【実施例】次に、実施例により本発明をさらに詳しく説
明するが、本発明は、これらの例によってなんら限定さ
れるものではない。 製造例1 HI−3の製造 300ミリリットルの三つ口フラスコに、4,4’−ジ
アミノ−トリフェニルアミン(ナード研究所社製)1.0
g,3−ヨードトルエン(東京化成社製)4.0g,無水
炭酸カリウム3g及び銅粉(広島和光社製)1gを入
れ、ジメチルスルホキシド(DMSO)200ミリリッ
トルに溶解し、200℃で8時間攪拌して反応させた。
反応終了液をろ過し、母液を塩化メチレンで抽出し、ロ
ータリエバポレーターで溶媒を留去し、残渣をシリカゲ
ル(広島和光社製)を充填したカラムで、トルエンを展
開溶媒として精製し、淡黄色粉末0.78gを得た。この
ものは、NMR及びFD−MS(フィールドディフュー
ジョン マススペクトル)の測定により、4,4’−ビ
ス〔N,N−ジ(3−トリル)アミノ〕トリフェニルア
ミン(HI−3)と同定した。
The present invention will be described in more detail by way of examples, which should not be construed as limiting the invention thereto. Production Example 1 Production of HI-3 In a 300 ml three-necked flask, 4,4'-diamino-triphenylamine (manufactured by Nard Laboratories) 1.0
g, 3-iodotoluene (manufactured by Tokyo Chemical Industry Co., Ltd.) 4.0 g, anhydrous potassium carbonate 3 g and copper powder (manufactured by Hiroshima Wako Co., Ltd.) 1 g were added, dissolved in 200 ml of dimethyl sulfoxide (DMSO), and stirred at 200 ° C. for 8 hours. And reacted.
The reaction-terminated liquid was filtered, the mother liquor was extracted with methylene chloride, the solvent was distilled off with a rotary evaporator, and the residue was purified with toluene as a developing solvent in a column packed with silica gel (Hiroshima Wako), a pale yellow powder. 0.78 g was obtained. This product was identified as 4,4′-bis [N, N-di (3-tolyl) amino] triphenylamine (HI-3) by NMR and FD-MS (field diffusion mass spectrum) measurement.

【0050】製造例2 HI−16の製造 製造例1において、3−ヨードトルエンの代わりに4−
ヨードアニソール(広島和光社製)4.0gを用いた以外
は、製造例1と同様に反応,精製して淡黄色粉末0.66
gを得た。このものは、NMR及びFD−MSの測定よ
り、4,4’−ビス〔N,N−ジ(4−メトキシフェニ
ル)アミノ〕トリフェニルアミン(HI−16)と同定
した。 製造例3 HI−35の製造 製造例1において、3−ヨードトルエンの代わりに4−
ヨードビフェニル(ナード研究所社製)5.0gを用いた
以外は、製造例1と同様に反応,精製して淡黄色粉末0.
34gを得た。このものは、NMR及びFD−MSの測
定より、4,4’−ビス〔N,N−ジ(ジフェノ−4−
イル)アミノ〕トリフェニルアミン(HI−35)と同
定した。
Production Example 2 Production of HI-16 In Production Example 1, 4-iodotoluene was replaced with 4-
Pale yellow powder 0.66 reacted and purified in the same manner as in Production Example 1 except that 4.0 g of iodoanisole (produced by Hiroshima Wako) was used.
g was obtained. This was identified as 4,4′-bis [N, N-di (4-methoxyphenyl) amino] triphenylamine (HI-16) by NMR and FD-MS measurements. Production Example 3 Production of HI-35 In Production Example 1, 4-iodotoluene was replaced with 4-
A pale yellow powder was prepared by reacting and purifying in the same manner as in Production Example 1 except that 5.0 g of iodobiphenyl (Nard Institute) was used.
34 g were obtained. This product was confirmed to be 4,4'-bis [N, N-di (dipheno-4-) by NMR and FD-MS measurements.
Ile) amino] triphenylamine (HI-35).

【0051】製造例4 HT−23の製造 製造例1において、4,4' −ジアミノ−トリフェニル
アミンの代わりにN,N’−ジフェニル−4,4' −ベ
ンジジン2.0gを用いた以外は、製造例1と同様に反
応,精製し、白色粉末1.6gを得た。このものは、NM
R及びFD−MSの測定より、N,N’−ビス(3−ト
リル)−N,N’−ジフェニル−4,4' −ベンジジン
(HT−23)と同定した。 製造例5 HT−39の製造 製造例1において、4,4' −ジアミノ−トリフェニル
アミンの代わりに4,4’−ビス(4−アミノフェニ
ル)トリフェニルアミン1.0gを用い、かつ3−ヨード
トルエンの代わりにヨードベンゼン(広島和光社製)3.
0gを用いた以外は、製造例1と同様に反応,精製し、
白色粉末0.31gを得た。このものは、NMR及びFD
−MSの測定より、4,4’−ビス〔4−(N,N−ジ
フェニルアミノ)フェニル〕トリフェニルアミン(HT
−39)と同定した。
Production Example 4 Production of HT-23 Except that in Production Example 1, 2.0 g of N, N'-diphenyl-4,4'-benzidine was used in place of 4,4'-diamino-triphenylamine. The reaction and purification were conducted in the same manner as in Production Example 1 to obtain 1.6 g of a white powder. This is NM
From R and FD-MS measurements, it was identified as N, N′-bis (3-tolyl) -N, N′-diphenyl-4,4′-benzidine (HT-23). Production Example 5 Production of HT-39 In Production Example 1, 1.0 g of 4,4′-bis (4-aminophenyl) triphenylamine was used in place of 4,4′-diamino-triphenylamine, and 3-HT Iodobenzene (made by Hiroshima Wako) instead of iodotoluene 3.
Reaction and purification were conducted in the same manner as in Production Example 1 except that 0 g was used,
0.31 g of white powder was obtained. This one is NMR and FD
From the measurement of -MS, 4,4'-bis [4- (N, N-diphenylamino) phenyl] triphenylamine (HT
-39).

【0052】製造例6 DPVBiの製造 300ミリリットルの三つ口フラスコに、4,4’−ジ
ブロモメチル−ビフェニル(ナード研究所社製)1.0
g,ベンゾフェノン(東京化成社製)3.0g及びカリウ
ムt−ブトキシド(広島和光社製)0.50g を入れ,DM
SO150ミリリットルに溶解し、室温で12時間攪拌
し、反応させた。反応終了液をトルエンで抽出し、ロー
タリエバポレーターで溶媒を留去し、残渣をシリカゲル
(広島和光社製)を充填したカラムで、トルエンを展開
溶媒として精製し、白色粉末1.1gを得た。このもの
は、NMR及びFD−MSの測定より、4,4’−ビス
(2,2−ジフェニル−1−ビニル)−1,1’−ビフ
ェニル(DPVBi)と同定した。
Production Example 6 Production of DPVBi In a 300 ml three-necked flask, 4,4'-dibromomethyl-biphenyl (manufactured by Nard Laboratories) 1.0
DM, 3.0 g of benzophenone (manufactured by Tokyo Kasei) and 0.50 g of potassium t-butoxide (manufactured by Hiroshima Wako) were added, and DM was added.
It was dissolved in 150 ml of SO and stirred at room temperature for 12 hours for reaction. The reaction completed liquid was extracted with toluene, the solvent was distilled off with a rotary evaporator, and the residue was purified with a column packed with silica gel (Hiroshima Wako Co., Ltd.) with toluene as a developing solvent to obtain 1.1 g of a white powder. This was identified as 4,4′-bis (2,2-diphenyl-1-vinyl) -1,1′-biphenyl (DPVBi) by NMR and FD-MS measurements.

【0053】製造例7 MTDATAの製造 製造例1において、3−ヨードトルエンの代わりに4,
4’,4''−トリヨードトリフェニルアミン1.0gを用
い、かつ4,4' −ジアミノ−トリフェニルアミンの代
わりにN−(3−トリル)−N−フェニルアミン(アル
ドリッチ社製)1.0gを用いた以外は、製造例1と同様
に反応,精製し、淡黄色粉末0.30gを得た。このもの
は、NMR及びFD−MSの測定より、4,4’,4''
−トリス〔N−(3−トリル)−N−フェニルアミノ〕
トリフェニルアミン(MTDATA)と同定した。
Production Example 7 Production of MTDATA In Production Example 1, 4-iodotoluene was replaced by 4,
1.0 g of 4 ', 4 "-triiodotriphenylamine was used, and N- (3-tolyl) -N-phenylamine (manufactured by Aldrich) 1 was used instead of 4,4'-diamino-triphenylamine. Reaction and purification were carried out in the same manner as in Production Example 1 except that 0.00 g was used to obtain 0.30 g of a pale yellow powder. This product was 4,4 ', 4''from NMR and FD-MS measurements.
-Tris [N- (3-tolyl) -N-phenylamino]
It was identified as triphenylamine (MTDATA).

【0054】製造例8 TA−1の製造 300ミリリットルの三つ口フラスコに、N,N’−ジ
フェニル−1,4−フェニレンジアミン(関東化学社
製)2.0g,4−フルオロニトロベンゼン(広島和光社
製)50ミリリットル及び無水炭酸カリウム5g及び銅
粉1gを入れ、200℃で8時間攪拌して反応させた。
反応終了液をろ過し、母液を塩化メチレンで抽出して溶
媒を留去した。残渣をシリカゲル(広島和光社製)を充
填したカラムで、トルエンを展開溶媒として精製した。
次いで、これをジメチルホルムアミド(DMF)100
ミリリットルに溶解し、5wt%Pd−C10gを入
れ、水素ガス気流下で8時間反応させた。これをろ過
し、溶媒を減圧下で留去して、得られた残渣をヨードベ
ンゼン(広島和光社製)100ミリリットルに溶解し、
無水炭酸カリウム10g 及び銅粉1gを加え、200℃で
8時間反応させた。反応終了後をろ過し、母液を塩化メ
チレンで抽出したのち、溶媒をロータリエバポレーター
で留去した。得られた残渣をシリカゲルを充填したカラ
ムで、トルエンを展開溶媒として精製して、黄色粉末0.
24gを得た。このものは、NMR及びFD−MSの測
定から、N,N’−ビス〔4−(N,N−ジフェニルア
ミノ)フェニル〕−N,N’−ジフェニル−1,4−フ
ェニレンジアミン(TA−1)と同定した。
Production Example 8 Production of TA-1 In a 300 ml three-necked flask, 2.0 g of N, N'-diphenyl-1,4-phenylenediamine (manufactured by Kanto Kagaku), 4-fluoronitrobenzene (Hiroshima Wako) (Manufactured by K.K.), 50 ml of anhydrous potassium carbonate, 5 g of anhydrous potassium carbonate and 1 g of copper powder were added, and the mixture was stirred at 200 ° C. for 8 hours to react.
The reaction completion liquid was filtered, the mother liquor was extracted with methylene chloride, and the solvent was distilled off. The residue was purified with a column packed with silica gel (Hiroshima Wako Co., Ltd.) using toluene as a developing solvent.
Then, this is added to dimethylformamide (DMF) 100.
It was dissolved in milliliters, 10 g of 5 wt% Pd-C was added, and the mixture was reacted under a hydrogen gas stream for 8 hours. This was filtered, the solvent was distilled off under reduced pressure, and the resulting residue was dissolved in 100 ml of iodobenzene (Hiroshima Wako),
10 g of anhydrous potassium carbonate and 1 g of copper powder were added, and the mixture was reacted at 200 ° C. for 8 hours. After completion of the reaction, the mixture was filtered, the mother liquor was extracted with methylene chloride, and then the solvent was distilled off with a rotary evaporator. The obtained residue was purified with a column packed with silica gel using toluene as a developing solvent to give a yellow powder.
24 g was obtained. This product was analyzed by NMR and FD-MS to find that N, N′-bis [4- (N, N-diphenylamino) phenyl] -N, N′-diphenyl-1,4-phenylenediamine (TA-1). ) Was identified.

【0055】実施例1 25mm×75mm×1.1mmサイズのガラス基板上に
ITO電極を100nmの厚さで成膜したものを透明支
持基板とした。これをイソプロピルアルコールで5分間
超音波洗浄したのち、純水で5分間洗浄し、最後に再び
イソプロピルアルコールで5分間超音波洗浄した。この
透明支持基板を市販の真空蒸着装置〔日本真空技術
(株)製〕の基板ホルダーに固定し、モリブデン製抵抗
加熱ボートに製造例1で得られたHI−3を入れ、別の
モリブデン製抵抗加熱ボートに製造例4で得られたHT
−23を入れ、さらに別のモリブデン製抵抗加熱ボート
に製造例6で得られたDPVBiを入れ、真空チャンバ
ー内を1×10-3Paまで減圧した。そして、それぞれ
のボートを加熱して、まずHI−3を60nm、次いで
HT−23を20nm、DPVBiを40nmの厚さで
基板上に堆積積層させた。次に、一旦常圧に戻し、別の
モリブデン製抵抗加熱ボートにトリス(8−ヒドロキシ
キノリン)アルミニウム(Alq,同仁化学研究所社
製)を入れ、さらに別のモリブデン製ボートにマグネシ
ウムリボンを、タングステン製バスケットに銀を入れ
た。その後、真空槽を2×10-4Paまで減圧して、ま
ずAlqの入ったボートを通電加熱して、AlqをDP
VBiの上に20nmの厚さで堆積させた。次に、マグ
ネシウムと銀を重量比10:1の割合で蒸発させ、マグ
ネシウムと銀の合金陰電極を200nmの厚さで形成
し、有機電界発光素子を作製した。この素子のITO電
極を正、マグネシウム−銀合金陰電極を負にし、電圧を
印加して素子を発光させたところ、印加電圧8Vで電流
密度:1.6mA/cm2 ,輝度:30cd/m2 ,発光
効率:0.74ルーメン/Wであり、高効率であった。
Example 1 A glass substrate having a size of 25 mm × 75 mm × 1.1 mm and an ITO electrode having a thickness of 100 nm was formed as a transparent supporting substrate. This was ultrasonically cleaned with isopropyl alcohol for 5 minutes, then with pure water for 5 minutes, and finally again with isopropyl alcohol for 5 minutes. This transparent support substrate was fixed to a substrate holder of a commercially available vacuum evaporation system [manufactured by Nippon Vacuum Technology Co., Ltd.], and the HI-3 obtained in Production Example 1 was put in a molybdenum resistance heating boat to obtain another molybdenum resistance. HT obtained in Production Example 4 in a heating boat
-23 was put, and DPVBi obtained in Production Example 6 was put in another molybdenum resistance heating boat, and the pressure in the vacuum chamber was reduced to 1 × 10 −3 Pa. Then, each boat was heated to deposit and stack HI-3 at 60 nm, HT-23 at 20 nm, and DPVBi at a thickness of 40 nm on the substrate. Next, the pressure is returned to normal pressure, tris (8-hydroxyquinoline) aluminum (Alq, manufactured by Dojindo Laboratories) is put in another molybdenum resistance heating boat, and another molybdenum boat is further loaded with magnesium ribbon and tungsten. I put silver in the basket. After that, the pressure in the vacuum chamber was reduced to 2 × 10 −4 Pa, and the boat containing Alq was first electrically heated to DPp Alq.
It was deposited on VBi to a thickness of 20 nm. Next, magnesium and silver were evaporated at a weight ratio of 10: 1 to form an alloy negative electrode of magnesium and silver with a thickness of 200 nm, to fabricate an organic electroluminescence device. When the ITO electrode of this device was made positive and the magnesium-silver alloy negative electrode was made negative and a voltage was applied to cause the device to emit light, a current density of 1.6 mA / cm 2 and a brightness of 30 cd / m 2 at an applied voltage of 8V. , Luminous efficiency: 0.74 lumen / W, which was high efficiency.

【0056】実施例2 実施例1において、HI−3の代わりに製造例2で得ら
れたHI−16を用いた以外は、実施例1と同様にして
有機電界発光素子を作製した。この素子のITO電極を
正、マグネシウム−銀合金陰電極を負にし、電圧を印加
して素子を発光させたところ、印加電圧8Vで電流密
度:2.0mA/cm2 ,輝度:55cd/m2 ,発光効
率:1.1ルーメン/Wであり、高効率であった。
Example 2 An organic electroluminescence device was produced in the same manner as in Example 1 except that HI-16 obtained in Production Example 2 was used in place of HI-3. When the ITO electrode of this device was made positive and the magnesium-silver alloy negative electrode was made negative and a voltage was applied to cause the device to emit light, a current density of 2.0 mA / cm 2 and a brightness of 55 cd / m 2 at an applied voltage of 8V. , Luminous efficiency: 1.1 lumen / W, which was high efficiency.

【0057】実施例3 実施例1において、HI−3の代わりに製造例3で得ら
れたHI−35を用いた以外は、実施例1と同様にして
有機電界発光素子を作製した。この素子のITO電極を
正、マグネシウム−銀合金陰電極を負にし、電圧を印加
して素子を発光させたところ、印加電圧8Vで電流密
度:1.8mA/cm2 ,輝度:40cd/m2 ,発光効
率:0.87ルーメン/Wであり、高効率であった。 実施例4 実施例1において、HT−23の代わりに製造例5で得
られたHT−39を用いた以外は、実施例1と同様にし
て有機電界発光素子を作製した。この素子のITO電極
を正、マグネシウム−銀合金陰電極を負にし、電圧を印
加して素子を発光させたところ、印加電圧8Vで電流密
度:2.1mA/cm2 ,輝度:38cd/m2 ,発光効
率:0.71ルーメン/Wであり、高効率であった。
Example 3 An organic electroluminescence device was produced in the same manner as in Example 1 except that HI-35 obtained in Production Example 3 was used in place of HI-3. When the ITO electrode of this element was positive and the magnesium-silver alloy negative electrode was negative, and a voltage was applied to cause the element to emit light, a current density of 1.8 mA / cm 2 and a brightness of 40 cd / m 2 were applied at an applied voltage of 8V. , Luminous efficiency: 0.87 lumen / W, which was high efficiency. Example 4 An organic electroluminescence device was produced in the same manner as in Example 1 except that HT-39 obtained in Production Example 5 was used instead of HT-23. The ITO electrode of this device was made positive, the magnesium-silver alloy negative electrode was made negative, and a voltage was applied to cause the device to emit light. At an applied voltage of 8 V, the current density was 2.1 mA / cm 2 , and the brightness was 38 cd / m 2. , Luminous efficiency: 0.71 lumen / W, which was high efficiency.

【0058】比較例1 実施例1において、HI−3の代わりに製造例7で得ら
れたMTDATAを用いた以外は、実施例1と同様にし
て有機電界発光素子を作製した。この素子のITO電極
を正、マグネシウム−銀合金陰電極を負にし、電圧を印
加して素子を発光させたところ、印加電圧8Vで電流密
度:2.1mA/cm2 ,輝度:20cd/m2 ,発光効
率:0.37ルーメン/Wであり、低効率であった。MT
DATA
Comparative Example 1 An organic electroluminescent device was prepared in the same manner as in Example 1 except that MTDATA obtained in Production Example 7 was used instead of HI-3. The ITO electrode of this device was made positive, the magnesium-silver alloy negative electrode was made negative, and a voltage was applied to cause the device to emit light. At an applied voltage of 8 V, the current density was 2.1 mA / cm 2 , and the brightness was 20 cd / m 2. , Luminous efficiency: 0.37 lumen / W, which was low efficiency. MT
DATA

【0059】[0059]

【化10】 [Chemical 10]

【0060】比較例2 実施例1において、HT−23を積層しなかったこと以
外は、実施例1と同様にして有機電界発光素子を作製し
た。この素子のITO電極を正、マグネシウム−銀合金
陰電極を負にし、電圧を印加して素子を発光させたとこ
ろ、印加電圧8Vで電流密度:7.0mA/cm2 ,輝
度:6.0cd/m2 ,発光効率:0.03ルーメン/Wで
あり、低効率であった。
Comparative Example 2 An organic electroluminescence device was produced in the same manner as in Example 1 except that HT-23 was not laminated. When the ITO electrode of this device was made positive and the magnesium-silver alloy negative electrode was made negative and a voltage was applied to cause the device to emit light, a current density of 7.0 mA / cm 2 and a brightness of 6.0 cd / at an applied voltage of 8V. m 2 , luminous efficiency: 0.03 lumen / W, which was low efficiency.

【0061】比較例3 実施例1において、HI−3の代わりに製造例8で得ら
れたTA−1を用いた以外は、実施例1と同様にして有
機電界発光素子を作製した。この素子のITO電極を
正、マグネシウム−銀合金陰電極を負にし、電圧を印加
して素子を発光させたところ、印加電圧8Vで電流密
度:1.5mA/cm2 ,輝度:7.0cd/m2 ,発光効
率:0.18ルーメン/Wであり、低効率であった。 TA−1
Comparative Example 3 An organic electroluminescence device was produced in the same manner as in Example 1 except that TA-1 obtained in Production Example 8 was used in place of HI-3. When the ITO electrode of this device was positive and the magnesium-silver alloy negative electrode was negative and a voltage was applied to cause the device to emit light, a current density of 1.5 mA / cm 2 and a brightness of 7.0 cd / at an applied voltage of 8V. m 2 , luminous efficiency: 0.18 lumen / W, which was low efficiency. TA-1

【0062】[0062]

【化11】 [Chemical 11]

【0063】実施例5 アルミニウム基板上に、0.1 μm厚のメトキシメチル化
ナイロン〔ユニチカ(株)製,商品名:T−8〕からな
るアンダーコート層を形成し、このアンダーコート層上
にA型チタニルフタロシアニンとポリビニルブチラール
〔積水化学(株)製,商品名:BX−1 〕を含む0.1 μ
m厚の電荷発生層を形成した。さらに、その上に製造例
1で得られたHI−3及び製造例4で得られたHT−2
3を、実施例1と同様の真空蒸着法によって、それぞれ
60nm及び20nmの厚さで正孔注入性薄膜を形成さ
せた。この膜の電子写真特性の評価を、川口電気社製静
電記録試験装置を用い、次のようにして行った。すなわ
ち、−6kVのコロナ放電で帯電させたのち、3秒間暗
減衰させ、5ルックスの白色光を5秒間昭射して、その
表面電位が1/2になるまでの時間(秒)を求めた。そ
の結果、半減露光量は0.4ルックス秒であった。このよ
うに、本発明の有機薄膜は極めて良好な電子写真特性を
有していた。
Example 5 An undercoat layer made of methoxymethylated nylon [manufactured by Unitika Ltd., trade name: T-8] having a thickness of 0.1 μm was formed on an aluminum substrate, and an A type was formed on the undercoat layer. 0.1μ containing titanyl phthalocyanine and polyvinyl butyral [Sekisui Chemical Co., Ltd., trade name: BX-1]
An m-thick charge generating layer was formed. Furthermore, HI-3 obtained in Production Example 1 and HT-2 obtained in Production Example 4 were further added thereto.
A hole injecting thin film having a thickness of 60 nm and a film having a thickness of 20 nm were formed on the sample No. 3 by the same vacuum deposition method as in Example 1. The electrophotographic characteristics of this film were evaluated using an electrostatic recording tester manufactured by Kawaguchi Electric Co., Ltd. as follows. That is, after charging by corona discharge of -6 kV, dark decay was performed for 3 seconds, white light of 5 lux was irradiated for 5 seconds, and the time (second) until the surface potential became 1/2 was obtained. . As a result, the half exposure amount was 0.4 lux seconds. Thus, the organic thin film of the present invention had extremely good electrophotographic characteristics.

【0064】以上の結果、従来技術に基づく構成である
比較例1〜3の有機電界発光素子の発光効率は0.03〜
0.37ルーメン/Wといずれも低いのに対し、本発明の
構成に基づく有機電界発光素子は、実施例1〜4に示さ
れるように、発光効率が0.71〜1.1ルーメン/Wと著
しく向上している。また、実施例5から明らかなよう
に、本発明の有機薄膜は、優れた正孔の注入及び輸送性
を有している。
As a result, the luminous efficiency of the organic electroluminescent devices of Comparative Examples 1 to 3 having the structure based on the prior art is 0.03 to.
While the organic electroluminescent elements based on the constitution of the present invention have a low luminous efficiency of 0.71 to 1.1 lumen / W, both are low at 0.37 lumen / W. And has improved significantly. Moreover, as is clear from Example 5, the organic thin film of the present invention has excellent hole injection and transport properties.

【0065】[0065]

【発明の効果】本発明の有機電界発光素子は、長期間保
存しても絶縁破壊のおそれが少ない上、発光効率が著し
く高く、各種表示装置における発光素子として好適に用
いられる。また、本発明の有機薄膜は正孔注入・輸送性
に極めて優れており、有機電界発光素子をはじめ、その
他の有機デバイスや電子写真感光体などに好適に用いら
れる。
INDUSTRIAL APPLICABILITY The organic electroluminescent device of the present invention is less likely to cause dielectric breakdown even after being stored for a long period of time, and has extremely high luminous efficiency, and is suitably used as a light emitting device in various display devices. Further, the organic thin film of the present invention is extremely excellent in hole injection / transport properties, and is suitably used for other organic devices such as an organic electroluminescence device and an electrophotographic photoreceptor.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 正孔輸送帯域層及び発光帯域層を少なく
とも含む有機化合物層と、この有機化合物層を挟持する
一対の電極とを備えた有機電界発光素子において、上記
正孔輸送帯域層が少なくとも正孔注入層と正孔輸送層と
からなり、かつ該正孔注入層が、一般式(I) 【化1】 〔式中、Ar1 〜Ar5 は、それぞれ無置換又はアルキ
ル基,アルコキシ基,ビニル基若しくはスチリル基で置
換された炭素数6〜18の芳香族基を示し、それらはた
がいに同一でも異なっていてもよい。〕で表される化合
物を含有するものであって、陽極と接していることを特
徴とする有機電界発光素子。
1. An organic electroluminescent device comprising an organic compound layer including at least a hole transporting band layer and an emission banding layer, and a pair of electrodes sandwiching the organic compound layer, wherein the hole transporting band layer is at least It is composed of a hole injection layer and a hole transport layer, and the hole injection layer has the general formula (I): [In the formula, Ar 1 to Ar 5 each represents an aromatic group having 6 to 18 carbon atoms which is unsubstituted or substituted with an alkyl group, an alkoxy group, a vinyl group or a styryl group, and they may be the same or different. May be. ] The organic electroluminescent element containing the compound represented by these, and being in contact with the anode.
【請求項2】 正孔輸送層が、一般式(II) 【化2】 〔式中、Xは単結合,メチレン基,フェニレン基,ビフ
ェニレン基,−O−,−S−又は 【化3】 で表される基を示す。Ar6 〜Ar10は、それぞれ無置
換又はアルキル基,アルコキシ基,ビニル基若しくはス
チリル基で置換された炭素数6〜18の芳香族基を示
し、それらはたがいに同一でも異なっていてもよい。〕
で表される化合物を含有するものである請求項1記載の
有機電界発光素子。
2. The hole transport layer has the general formula (II): [In the formula, X is a single bond, a methylene group, a phenylene group, a biphenylene group, -O-, -S- or Represents a group represented by. Ar 6 to Ar 10 each represents an aromatic group having 6 to 18 carbon atoms which is unsubstituted or substituted with an alkyl group, an alkoxy group, a vinyl group or a styryl group, and they may be the same or different from each other. ]
The organic electroluminescent device according to claim 1, which contains a compound represented by:
【請求項3】 正孔注入層及び正孔輸送層の厚さが、そ
れぞれ5nm〜5μmである請求項1又は2記載の有機
電界発光素子。
3. The organic electroluminescence device according to claim 1, wherein the hole injection layer and the hole transport layer each have a thickness of 5 nm to 5 μm.
【請求項4】 一般式(I)で表される化合物を含有す
る厚さ5nm〜5μmの層と、一般式(II) で表される
化合物を含有する厚さ5nm〜5μmの層との二層から
なる有機薄膜。
4. A layer having a thickness of 5 nm to 5 μm containing the compound represented by the general formula (I) and a layer having a thickness of 5 nm to 5 μm containing the compound represented by the general formula (II). Organic thin film consisting of layers.
JP00625495A 1995-01-19 1995-01-19 Organic electroluminescent device and organic thin film Expired - Fee Related JP3306735B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP00625495A JP3306735B2 (en) 1995-01-19 1995-01-19 Organic electroluminescent device and organic thin film
DE69617639T DE69617639T2 (en) 1995-01-19 1996-01-19 ORGANIC ELECTROLUMINESCENT ELEMENT, ORGANIC THIN FILM AND TRIAMINE COMPOUNDS
EP96900715A EP0805143B1 (en) 1995-01-19 1996-01-19 Organic electroluminescent element, organic thin film, and triamine compounds
CNB961915277A CN1152607C (en) 1995-01-19 1996-01-19 organic electroluminescent device, organic thin film and triamine compound
PCT/JP1996/000082 WO1996022273A1 (en) 1995-01-19 1996-01-19 Organic electroluminescent element, organic thin film, and triamine compounds
US08/860,927 US6074734A (en) 1995-01-19 1996-01-19 Organic electroluminescence device, organic thin film, and triamine compound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP00625495A JP3306735B2 (en) 1995-01-19 1995-01-19 Organic electroluminescent device and organic thin film

Publications (2)

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JPH08193191A true JPH08193191A (en) 1996-07-30
JP3306735B2 JP3306735B2 (en) 2002-07-24

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