| Project/Area Number |
07555296
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 試験 |
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| Research Field |
高分子構造・物性(含繊維)
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| Research Institution | TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY |
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Principal Investigator |
MIYATA Seizo TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY,BASE,Professor, 大学院・生物システム応用科学研究科, 教授 (90015066)
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| Co-Investigator(Kenkyū-buntansha) |
SHIRASAKI Tomoyuki Casio Computer Co.Ltd., Ohme Res.Lab., Senior Researcher, 青梅事業所, 主任研究員
山田 裕康 カシオ計算機(株), 青梅事業所, 主任研究員
WATANABE Toshiyuki TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY,BASE,Assist.Prof., 工学部, 助手 (10210923)
YAMADA Yasuhiro Casio Computer Co.Ltd., Ohme Res.Lab., Senior Researcher
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥13,100,000 (Direct Cost: ¥13,100,000)
Fiscal Year 1996: ¥4,000,000 (Direct Cost: ¥4,000,000)
Fiscal Year 1995: ¥9,100,000 (Direct Cost: ¥9,100,000)
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| Keywords | Electroluminescence / Fullerene / C60 / Polymer / Electron transport materials / Co-evaporation |
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| Research Abstract |
Organic materials have been expected to be applicable for practical electroluminescent (EL) devices because of their high fluorescence efficiency and semiconducting properties. One of problems for EL devices is short life time. In order to improve this problem we develop novel C60 polymer and co-evaporating technique. For the hole transport layr (HTL), poly (N-vinyl carbazole) PVCz was used. The coumarine 6 was doped into PVCz as an emitting dye. The cell structure was Mg/Tris (8-quinolinolate) aluminum (III) complex (Alq_3) /C60 polymer and PVCz/ITO.The all polymeric layrs were prepared by spin coating. C60 polymer works as a good electron transport layr. In order to improve the metal organic interface, the co-evaporating technique was applied to the preparation of cathode electrode. The 3 nm thick magnesium/Alq_3 composite layr (20 : 1 of weight ratio) was prepared on a C60 polymer. The EL emission threshold of novel EL device is slightly smaller than that of conventional multi-layr EL devices. Brightness and color were uniform over the whole emitting area, and no discharge was found till bias voltage of 12 V.The current and EL intensity of novel EL device is 1.4 and 2 times larger than that of conventional multi-layr EL devices, respectively. The novel EL device shows the highest brightness 25,000 cd/m^2 at the condition of 1000 mA/cm^2. The decay of the emission intensity was also improved by the introduction of co-evaporating metal-organic layr.
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