Efficiency Enhancement and Color Stabilization in Organic Light-Emitting Devices Utilizing a Fullerene–Polymer Composite Layer Acting as a Hole Transport Layer
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概要
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The electrical and optical properties of organic light-emitting devices (OLEDs) utilizing a nanopolymer composite layer consisting of fullerene (C60) and poly(2-methoxy-5-[2$'$-ethylhexyloxy]-p-phenylenevinylene) (MEH-PPV) were investigated. The current density of devices with a C60/MEH-PPV composite hole transport layer (HTL) was larger than that of devices without a composite HTL owing to the enhancement in the hole injection and transport. The luminance efficiency of the OLEDs utilizing a C60/MEH-PPV composite layer was significantly enhanced owing to an increase in the conductivity of the C60/MEH-PPV composite HTL. The recombination region in the center of the emitting layer for the device with a C60/MEH-PPV composite layer decreased the variation of color coordinates and enhanced the color stability, resulting in the realization of the highly efficient device.
- 2008-08-25
著者
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Kim Tae
Advanced Semiconductor Research Center Division Of Electrical And Computer Engineering Hanyang Unive
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Kim Young
Department Of Agricultural Chemistry The University Of Tokyo
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Choo Dong
Research Institute Of Information Display Department Of Electronics And Computer Engineering Hanyang
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Lee Seok
Department Of Dermatology Yonsei University College Of Medicine
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Park Jung
Department Electrical Engineering Busan National University
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Park Jung
Department of Information Display Engineering, Center for Organic Materials and Information Display (COMID), Hong-ik University, Seoul 121-791, Korea
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Seo Seung
Advanced Semiconductor Research Center, Division of Electronics and Computer Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea
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Choo Dong
Research Institute of Information Display, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea
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Kim Young
Department of Chemical Engineering, Hong-ik University, Seoul 121-791, Korea
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Lee Seok
Department of Information Display Engineering, Center for Organic Materials and Information Display (COMID), Hong-ik University, Seoul 121-791, Korea
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