JPH02220393A - Electroluminescence element - Google Patents
Electroluminescence elementInfo
- Publication number
- JPH02220393A JPH02220393A JP1038703A JP3870389A JPH02220393A JP H02220393 A JPH02220393 A JP H02220393A JP 1038703 A JP1038703 A JP 1038703A JP 3870389 A JP3870389 A JP 3870389A JP H02220393 A JPH02220393 A JP H02220393A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- film
- layer
- compound
- electroluminescent device
- 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.)
- Pending
Links
- 238000005401 electroluminescence Methods 0.000 title 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- 239000010409 thin film Substances 0.000 claims description 14
- 230000005525 hole transport Effects 0.000 claims description 12
- -1 aromatic aldazine compound Chemical class 0.000 claims description 7
- 150000002894 organic compounds Chemical class 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 125000003118 aryl group Chemical group 0.000 abstract 2
- 230000007423 decrease Effects 0.000 abstract 1
- 239000010408 film Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- OIQPTROHQCGFEF-UHFFFAOYSA-L chembl1371409 Chemical compound [Na+].[Na+].OC1=CC=C2C=C(S([O-])(=O)=O)C=CC2=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 OIQPTROHQCGFEF-UHFFFAOYSA-L 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229940099990 ogen Drugs 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
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
- Luminescent Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明は電界発光素子に関し、特に有機化合物を発光体
として構成される電界発光素子に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an electroluminescent device, and particularly to an electroluminescent device constructed using an organic compound as a light emitter.
背景技術
この種の電界発光素子として、第２図に示すように、陰
極である金属電極１と陽極である透明電極２との間に有
機化合物からなり互いに積層された有機蛍光体薄膜３及
び有機正孔輸送層４が配された２層構造のものや、第３
図に示すように、金属電−１と透明電極２との間に互い
に積層された有機電子輸送層５、有機蛍光体薄膜３及び
有機正孔輸送層４が配された３層構造のものが知られて
いる。ここで、有機正孔輸送層４は陽極から正孔を注入
させ易くする機能と電子をブロックする機能とを有し、
有機電子輸送層５は陰極から電子を注入させ易くする機
能を有している。BACKGROUND ART As shown in FIG. 2, this type of electroluminescent device uses an organic phosphor thin film 3 made of an organic compound and laminated on each other between a metal electrode 1 serving as a cathode and a transparent electrode 2 serving as an anode. Those with a two-layer structure in which a hole transport layer 4 is arranged, and those with a third layer structure.
As shown in the figure, there is a three-layer structure in which an organic electron transport layer 5, an organic phosphor thin film 3, and an organic hole transport layer 4 are laminated between a metal electrode 1 and a transparent electrode 2. Are known. Here, the organic hole transport layer 4 has a function of facilitating injection of holes from the anode and a function of blocking electrons,
The organic electron transport layer 5 has a function of facilitating injection of electrons from the cathode.
これら電界発光素子において、透明電極２の外側にはガ
ラス基板６が配されており、金属電極１から注入された
電子と透明電極２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６を介して外
部に放出されることになる。In these electroluminescent devices, a glass substrate 6 is disposed outside the transparent electrode 2, and excitons are generated by recombination of electrons injected from the metal electrode 1 and holes injected from the transparent electrode 2. The excitons emit light in the process of being radiatively deactivated, and this light is emitted to the outside via the transparent electrode 2 and the glass substrate 6.
しかしながら、上述した構成の従来の電界発光素子にお
いては、蛍光帯域の狭いものしか開発されておらず、ま
た、発光効率が低いので蛍光体を高輝度にて発光させる
ことができないという欠点があった。However, conventional electroluminescent devices with the above-mentioned configuration have only been developed with a narrow fluorescent band, and have low luminous efficiency, making it impossible to emit light from the phosphor at high brightness. .
発明の概要
本発明は、上述した従来のものの欠点を除去すべくなさ
れたものであって、蛍光体を効率良く高輝度にて発光さ
せることができる電界発光素子を提供することを目的と
する。SUMMARY OF THE INVENTION The present invention was made to eliminate the drawbacks of the conventional devices described above, and an object of the present invention is to provide an electroluminescent device that can efficiently cause a phosphor to emit light with high brightness.
本発明による電界発光素子においては、有機化合物から
なり互いに積層された蛍光体発光層及び正孔輸送層が陰
極及び陽極間に配された構成の電界発光素子であって、
前記蛍光体発光層は芳香族アルダジン系化合物を含む蛍
光体薄膜からなることを特徴とする。The electroluminescent device according to the present invention is an electroluminescent device having a structure in which a phosphor emitting layer and a hole transport layer made of an organic compound and stacked on each other are arranged between a cathode and an anode,
The phosphor emitting layer is characterized in that it is made of a phosphor thin film containing an aromatic aldazine compound.
実施例 以下、本発明の実施例を図に基づいて詳細に説明する。Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
第１図は本発明の一実施例を示す構造図であり、図中第
２図及び第３図と同等部分には同一符号が付されている
。FIG. 1 is a structural diagram showing one embodiment of the present invention, in which the same parts as in FIGS. 2 and 3 are given the same reference numerals.
図において、陰極である金属電極１には、アルミニウム
の１５００人膜厚の薄膜を用いる。また、陰極１には、
仕事関数が小さな金属、例えば厚さが約５００Å以上の
アルミニウム、マグネシウム、インジウム又は銀が用い
得る。In the figure, a thin film of aluminum with a thickness of 1500 mm is used for the metal electrode 1 serving as the cathode. In addition, in the cathode 1,
Low work function metals can be used, such as aluminum, magnesium, indium, or silver with a thickness of about 500 Å or more.
陽極である透明電極２には、インジウムすず酸化物（１
，Ｔ、 Ｏ，）の２０００人膜厚の薄膜を用いる。ま
た、陽極２には、仕事関数の大きな導電性材料、例えば
厚さが１０００〜３０００人程度のＩ、 Ｔ、 Ｏ６又
は厚さが８００〜１５００人程度の金が用い得る。なお
、金を電極材料として用いた場合には、電極２は半透明
の状態となる。The transparent electrode 2, which is an anode, is made of indium tin oxide (1
, T, O,) with a thickness of 2000 people is used. Further, the anode 2 may be made of a conductive material with a large work function, such as I, T, or O6 having a thickness of about 1000 to 3000 mm, or gold having a thickness of about 800 to 1500 mm. Note that when gold is used as the electrode material, the electrode 2 becomes translucent.
金属電極１と透明電極２との間には、図の上から順に積
層された有機蛍光体薄膜７及び有機正孔輸送層４が配さ
れている。An organic phosphor thin film 7 and an organic hole transport layer 4 are arranged between the metal electrode 1 and the transparent electrode 2, which are laminated in order from the top in the figure.
有機正孔輸送層４には、ビスジフェニルアミン誘導体、
例えば下記式（１）の化合物の８００人膜厚の薄膜を用
いる。The organic hole transport layer 4 contains a bisdiphenylamine derivative,
For example, a thin film of the compound represented by the following formula (1) with a thickness of 800 layers is used.
また、有機正孔輸送層４には、更に下記式（ｎ）〜（Ｘ
ＩＩ）のＣＴＭ （Ｃａｒｒｌｅｒ Ｔｒａｎｓｌｔｉ
ｎｇ Ｍａｔｅｒｉａｌｓ ）として知られる化合物を
用い得る。In addition, the organic hole transport layer 4 further includes the following formulas (n) to (X
II) CTM (Carrler Translti)
Compounds known as ng Materials) can be used.
有機蛍光体薄膜７としては、芳香族アルダジン系化合物
を含む蛍光体薄膜が用いられる。例えば、下記（Ｘｍ）
式の芳香族アルダジン系化合物が用いられる。As the organic phosphor thin film 7, a phosphor thin film containing an aromatic aldazine compound is used. For example, below (Xm)
An aromatic aldazine compound of the formula is used.
尚、芳香族アルダジン系化合物はＢＡＳＦ■のｒＬｕｍ
ｏｇｅｎ Ｙｅｌｌｏｗ Ｓ ０７９０ Ｊ （商品
名）として得ることができる。また、有機蛍光体薄膜７
の膜厚は１μｍ以下に設定される。The aromatic aldazine compound is BASF ■ rLum.
It can be obtained as ogen Yellow S 0790 J (trade name). In addition, the organic phosphor thin film 7
The film thickness is set to 1 μm or less.
かかる構成の電界発光素子の各薄膜は、真空蒸着法によ
って真空度２Ｘ１０′５ ［Ｔｏ ｒ ｒ］以下、蒸着
速度０．１〜２０．０［入／ｓｅｅ］の条件下で成膜さ
れる。Each thin film of the electroluminescent device having such a structure is formed by a vacuum evaporation method under the conditions of a degree of vacuum of 2×10'5 [Torr] or less and a evaporation rate of 0.1 to 20.0 [in/see].
上記の如く製造された電界発光素子においては、駆動電
圧２５［Ｖ］の印加によって、最大輝度５［ｃｄ／ｍ２
］にて波長５５５ｎｍの発光を得ることができる。In the electroluminescent device manufactured as described above, the maximum luminance was 5 [cd/m2] by applying a driving voltage of 25 [V].
], it is possible to obtain light emission with a wavelength of 555 nm.
また、上記実施例においては陰極１及び陽極２間に有機
蛍光体薄膜７及び有機正孔輸送層４を配した２層構造と
したが、従来の陰極１及び蛍光体薄膜７層間にペリレン
テトラカルボキシル誘導体または下記（ＸＸ）式のペリ
レン誘導体からなる有機電子輸送層５を配した３層構造
としても同様の効果を奏する。In addition, in the above embodiment, a two-layer structure was adopted in which the organic phosphor thin film 7 and the organic hole transport layer 4 were arranged between the cathode 1 and the anode 2. A three-layer structure including an organic electron transport layer 5 made of a derivative or a perylene derivative of the following formula (XX) can also produce similar effects.
発明の詳細
な説明したように、本発明による電界発光素子において
は、有機化合物からなり互いに積層された蛍光体層及び
正孔輸送層が陰極及び陽極間に配された構成の電界発光
素子であって蛍光体層は芳香族アルダジン系化合物を含
む蛍光体薄膜からなり発光が蛍光体層と正孔輸送層の界
面で起きる事を特徴とする故に、界面で発光することで
発光体層の膜厚を極限まで薄く出来るために膜の形成効
率がよくなり、また膜及び膜の間での歪応力が小さくな
り素子としての信頼性が向上する。そして低電圧にて効
率良く高輝度で緑色発光させることができる。As described in detail of the invention, the electroluminescent device according to the present invention has a structure in which a phosphor layer and a hole transport layer made of an organic compound and stacked on each other are arranged between a cathode and an anode. The phosphor layer is made of a phosphor thin film containing an aromatic aldazine compound, and light emission occurs at the interface between the phosphor layer and the hole transport layer. Since the film can be made as thin as possible, the film formation efficiency is improved, and the strain stress between the films is reduced, improving the reliability of the device. In addition, it is possible to efficiently emit green light with high brightness at low voltage.
第１図は本発明の実施例を示す構造図、第２図及び第３
図は従来例を示す構造図である。
主要部分の符号の説明
１・・・・・・金属電極（陰極）
２・・・・・・透明電極（陽極）
４・・・・・・有機正孔輸送層
６・・・・・・ガラス基板
７・・・・・・有機蛍光体薄膜Figure 1 is a structural diagram showing an embodiment of the present invention, Figures 2 and 3 are
The figure is a structural diagram showing a conventional example. Explanation of symbols for main parts 1...Metal electrode (cathode) 2...Transparent electrode (anode) 4...Organic hole transport layer 6...Glass Substrate 7...Organic phosphor thin film
Claims (4)
光層及び正孔輸送層が陰極及び陽極間に配された構成の
電界発光素子であって、前記蛍光体発光層は芳香族アル
ダジン系化合物を含む蛍光体薄膜からなることを特徴と
する電界発光素子。(1) An electroluminescent device having a structure in which a phosphor-emitting layer and a hole-transporting layer made of an organic compound and stacked on each other are arranged between a cathode and an anode, the phosphor-emitting layer comprising an aromatic aldazine compound. 1. An electroluminescent device comprising a phosphor thin film containing:
が配されたことを特徴とする請求項１記載の電界発光素
子。(2) The electroluminescent device according to claim 1, further comprising an organic electron transport layer disposed between the cathode and the phosphor layer.
ＸIII）、 ▲数式、化学式、表等があります▼（ＸIII） の化合物からなることを特徴とする請求項１記載の電界
発光素子。(3) The aromatic aldazine compound has the following structural formula (
2. The electroluminescent device according to claim 1, characterized in that the electroluminescent device is made of a compound of:
することを特徴とする請求項１又は２記載の電界発光素
子。(4) The electroluminescent device according to claim 1 or 2, wherein the luminescent layer emits light at an interface with the hole transport layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1038703A JPH02220393A (en) | 1989-02-18 | 1989-02-18 | Electroluminescence element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1038703A JPH02220393A (en) | 1989-02-18 | 1989-02-18 | Electroluminescence element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02220393A true JPH02220393A (en) | 1990-09-03 |
Family
ID=12532674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1038703A Pending JPH02220393A (en) | 1989-02-18 | 1989-02-18 | Electroluminescence element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02220393A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000041443A1 (en) | 1998-12-28 | 2000-07-13 | Idemitsu Kosan Co., Ltd. | Organic electroluminescence device |
| EP2262032A2 (en) | 1999-04-05 | 2010-12-15 | Idemitsu Kosan Co., Ltd. | Organic electroluminescence device and its manufacturing method |
-
1989
- 1989-02-18 JP JP1038703A patent/JPH02220393A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000041443A1 (en) | 1998-12-28 | 2000-07-13 | Idemitsu Kosan Co., Ltd. | Organic electroluminescence device |
| EP2270117A2 (en) | 1998-12-28 | 2011-01-05 | Idemitsu Kosan Co., Ltd. | Organic electroluminescence device |
| EP2262032A2 (en) | 1999-04-05 | 2010-12-15 | Idemitsu Kosan Co., Ltd. | Organic electroluminescence device and its manufacturing method |
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