Improved White Organic Light-Emitting Diodes with Modified Dual-Emission-Layer Designs
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概要
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In this work, the improved efficiency of highly pure white-light emission of white organic light-emitting diodes (WOLEDs), consisting of 2-(t-butyl)-9,10-bis(2$'$-naphthyl) anthracene (TBADN) and 5,6,11,12-tetraphenylnaphthacene (rubrene) has been achieved. Systematic design structures with a progressive improvement in efficiency and color purity have been successfully investigated. A dual emission layer (EML) of TBADN structures with modified rubrene doping, and the insertion of carrier-blocking layers such as tris(8-hydroxyquinoline) aluminum (Alq3), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), and 2,2$'$,2$''$-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBi) have been successfully designed and integrated to improve the device performance. The present cost-effective WOLED design, without the addition of blue dopants, demonstrated a superior high current efficiency of 6.09 cd/A with excellent Commission Internationale De L’Eclairage (CIE) coordinates of $(0.32,0.32)$.
- 2009-07-25
著者
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Hsu Wei-chou
Institute Of Microelectronics Department Of Electrical Engineering And Advanced Optoelectronic Techn
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Lee Ching-sung
Department Of Electrical Engineering National Cheng Kung University
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Wang Ching-Wu
Institute of Opto-Mechatronics, National Chung Cheng University, 168 University Road, Chia-Yi, Taiwan 62145, Republic of China
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Ho Chiu-Sheng
Institute of Microelectronics, Department of Electrical Engineering, and Advanced Optoelectronic Technology Center, National Cheng Kung University, 1 University Road, Tainan, Taiwan 70101, Republic of China
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Lai Wen-Feng
Institute of Microelectronics, Department of Electrical Engineering, and Advanced Optoelectronic Technology Center, National Cheng Kung University, 1 University Road, Tainan, Taiwan 70101, Republic of China
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Lai Ying-Nan
Institute of Microelectronics, Department of Electrical Engineering, and Advanced Optoelectronic Technology Center, National Cheng Kung University, 1 University Road, Tainan, Taiwan 70101, Republic of China
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Hsu Wei-Chou
Institute of Microelectronics, Department of Electrical Engineering, and Advanced Optoelectronic Technology Center, National Cheng Kung University, 1 University Road, Tainan, Taiwan 70101, Republic of China
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Yeh Su-Wei
Institute of Microelectronics, Department of Electrical Engineering, and Advanced Optoelectronic Technology Center, National Cheng Kung University, 1 University Road, Tainan, Taiwan 70101, Republic of China
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Lee Ching-Sung
Department of Electronic Engineering, Feng Chia University, 100 Wenhwa Road, Taichung, Taiwan 40724, Republic of China
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LAI Ying-Nan
Institute of Microelectronics, Department of Electrical Engineering, and Advanced Optoelectronic Technology Center, National Cheng Kung University
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WANG Ching-Wu
Institute of Opto-Mechatronics, National Chung Cheng University
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