The effect of the host structure on the optimum doping concentration in red phosphorescent organic light-emitting diodes (PHOLEDs) was investigated. A mixed host of the phosphine oxide derivative (SPPO21) and 4.4',4 ''-tris(N-carbazolyl)triphenylamine (TCTA) was used as the host in the red PHOLED and the device performances were studied according to the doping concentration. The device performance of the red PHOLED was optimized at a doping concentration of 2% in the SPPO21 rich red PHOLED, while the device performance was optimized at a doping concentration of 6% in the device with 50% TCTA content. It was found that the optimum doping concentration was determined by the energy transfer and charge trapping. (c) 2011 Elsevier B.V. All rights reserved.
机构:
Taishan Univ, Coll Phys & Elect Engn, Tai An 271021, Shandong, Peoples R ChinaTaishan Univ, Coll Phys & Elect Engn, Tai An 271021, Shandong, Peoples R China
Xiao, Jing
Liu, Xiao-Ke
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Chinese Acad Sci, Tech Inst Phys & Chem, Nanoorgan Photoelect Lab, Beijing 100190, Peoples R China
Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R ChinaTaishan Univ, Coll Phys & Elect Engn, Tai An 271021, Shandong, Peoples R China
Liu, Xiao-Ke
Wang, Xin-Xin
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Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China
Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215123, Jiangsu, Peoples R ChinaTaishan Univ, Coll Phys & Elect Engn, Tai An 271021, Shandong, Peoples R China
Wang, Xin-Xin
Zheng, Cai-Jun
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Chinese Acad Sci, Tech Inst Phys & Chem, Nanoorgan Photoelect Lab, Beijing 100190, Peoples R China
Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R ChinaTaishan Univ, Coll Phys & Elect Engn, Tai An 271021, Shandong, Peoples R China
Zheng, Cai-Jun
Li, Feng
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Taishan Univ, Coll Phys & Elect Engn, Tai An 271021, Shandong, Peoples R ChinaTaishan Univ, Coll Phys & Elect Engn, Tai An 271021, Shandong, Peoples R China
机构:
Elect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South KoreaElect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South Korea
Lee, Jonghee
Lee, Jeong-Ik
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Elect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South KoreaElect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South Korea
Lee, Jeong-Ik
Song, Ki-Im
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Elect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South KoreaElect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South Korea
Song, Ki-Im
Lee, Su Jin
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Elect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South KoreaElect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South Korea
Lee, Su Jin
Chu, Hye Yong
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Elect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South KoreaElect & Telecommun Res Inst, IT Convergence & Components Lab, Taejon 305350, South Korea
机构:
Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R ChinaDalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China
Li, Wei
Li, Jiuyan
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Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R ChinaDalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China
Li, Jiuyan
Wang, Miao
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Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R ChinaDalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China