High-Efficiency White Organic Light-Emitting Diodes Using Codoped Blue-Light-Emitting Layers with Different Functional Materials
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概要
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We have demonstrated high-efficiency white organic light-emitting diodes (WOLEDs) using codoped blue-emitting layers with three light emitters, 4$''$-(2,2-diphenylvinyl)-1-[4-(N,N-diphenylamino)-styryl]-terphenyl, fac-tris(2-phenypyridine) iridium(III), and bis(5-benzoyl-2-phenylpyridinato-C,N)iridium(III) (acetylacetonate). Blue-emitting layers (BEMLs) were codoped with the different functional materials, N,N$'$-bis(1-naphyl)-N,N$'$-diphenyl-1,1$'$-biphenyl-4,4$'$-diamine and 4,7-diphenyl-1,10-phenanthroline, which are used as charge-transporting materials in OLEDs. An optimized device with centralized carriers in emitting layers showed a maximum luminance of 19 710 cd/m2 at 12 V, a maximum luminous efficiency of 23.20 cd/A at 0.14 mA/cm2, and an external quantum efficiency of 10.20% at 32.19 cd/m2.
- 2009-05-25
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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Kim Jin
Department Of Anatomy And Cell Biology College Of Veterinary Medicine And Bk21 Program For Veterinar
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Seo Ji
Department Of Pediatrics School Of Medicine Gyeongsang National University Hospital
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Lee Kum
Department of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
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Hyung Gun
Department of Materials Science and Engineering, 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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Kim Gu
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Lee Kum
Department of Chemistry, Sungkyunkwan University, Suwon, Kyeonggi-do 440-746, Korea
-
Yoon Seung
Department of Chemistry, Sungkyunkwan University, Suwon, Kyeonggi-do 440-746, Korea
-
Kim Jin
Department of Chemistry, Sungkyunkwan University, Suwon, Kyeonggi-do 440-746, 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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Kim Young
Department of Information Display, Hongik University, Seoul 121-791, Korea
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Hyung Gun
Department of Information Display, Hongik University, Seoul 121-791, Korea
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