Hybrid White Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off
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概要
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The authors have demonstrated hybrid white organic light-emitting diodes (HWOLEDs) with reduced efficiency roll-off. It was shown that HWOLEDs fabricated with {9,9-dimethyl-7-[10-(naphthalen-2-yl)anthracen-9-yl]-9H-fluoren-2-yl} triphenylsilane (ANFTPS) as the blue host have the maximum external quantum efficiency of 9.92%, power efficiency of 14.51 lm/W, and reduced efficiency roll-off 2.0 times that of the control white device. The deep highest occupied molecular orbital of ANFTPS of the optimized white device adequately brocks holes and confines excitons in emitting layers. The white device also exhibited a more stable color shift from low to high current density than did the control white device.
- 2010-08-25
著者
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Yoon Seung
Department Of Chemistry Sung Kyun Kwan University
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Kim Young
Department Of Agricultural Chemistry The University Of Tokyo
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Seo Ji
Department Of Pediatrics School Of Medicine Gyeongsang National University Hospital
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Park Jeong
Department Of Basic Nursing Science And Institute For Nursing Science Keimyung University College Of
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Park Jung
Department Electrical Engineering Busan National University
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Lee Kum
Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
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Koo Ja
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Seo Bo
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Park Jung
Department of Information Display, Hongik University, Seoul 121-791, Korea
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YOON Seung
Department of Anaesthesiology and Pain Medicine, College of Medicine, Korea University
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Seo Ji
Department of Information Display Engineering, Hong-ik University, Seoul 121-791, Korea
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