Ratio Effect of Codoped Spacer on Electroluminescent Characteristics of Hybrid White Organic Light-Emitting Diodes
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概要
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The authors have demonstrated hybrid white organic light-emitting diodes (WOLEDs) using 1,4-bis[2-(7-N-diphenyamino-2-(9,9-diethyl-9H-fluoren-2-yl))vinyl] benzene as a fluorescent blue emitter and iridium(III) bis(2-phenylquinoline) acetylacetonate as a phosphorescent red emitter. As the spacer ratio of 4,4$'$,4$''$-tris-(N-carbazolyl) triphenylamine to 4,7-diphenyl-1,10-phenanthroline changed from $1:1$ to $1:3$, WOLEDs showed changes from cold to warm electroluminescent characteristics. The optimized WOLEDs of $1:3$ spacer ratio showed an external quantum efficiency of 7.40%, a luminous efficiency of 14.79 cd/A, and Commission Internationale de I’Eclairage coordinates of $(0.43, 0.39)$ at 1000 cd/m2.
- 2010-04-25
著者
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Seo Ji
Department Of Pediatrics School Of Medicine Gyeongsang National University Hospital
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Park Jung
Department Electrical Engineering Busan National University
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Jung Keun
Department of Chemistry, Sungkyunkwan University, Suwon, Kyeonggi-do 440-746, Korea
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Jung Sun
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Koo Ja
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Ja Ryong
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Suk Jae
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Bo Min
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Kum Hee
Department of Chemistry, Sungkyunkwan University, Suwon, Kyeonggi-do 440-746, Korea
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Seung Soo
Department of Chemistry, Sungkyunkwan University, Suwon, Kyeonggi-do 440-746, Korea
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Young Kwan
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Seo Ji
Department of Information Display Engineering, Hong-ik University, Seoul 121-791, Korea
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Ji Hoon
Department of Information Display, Hongik University, Seoul 121-791, Korea
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