Color Stability and High Efficiency of White Phosphorescent Organic Light-Emitting Diodes with Suitable Position of Phosphorescent Red Emitter
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概要
- 論文の詳細を見る
We have demonstrated high-efficiency phosphorescent white organic light-emitting diodes (PHWOLEDs) using iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N,C2] picolinate and iridium(III) bis[1-phenyl(quinolinato-N,C2’)]acetylacetonate doped in N,N$ '$-dicarbazolyl-3,5-benzene as a single-host system. As the position of the doped red emitter changed from near the anode to the cathode, the PHWOLED exhibited reduced exciton loss and greater color stability. The optimized PHWOLED exhibited a peak external quantum efficiency of 13.49%, a power efficiency of 20.59 lm/W, a current efficiency of 26.20 cd/A, and Commission Internationale de l’Eclairage coordinates of $(0.37, 0.35)$. The red emitter near the cathode includes efficient triplet energy confinement in the emitting layers.
- 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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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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