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Ratio Effect of Codoped Spacer on Electroluminescent Characteristics of Hybrid White Organic Light-Emitting Diodes
- Authors
- Seo, Ji Hoon; Park, Jung Sun; Koo, Ja Ryong; Lee, Suk Jae; Seo, Bo Min; Lee, Kum Hee; Park, Jung Keun; Yoon, Seung Soo; Kim, Young Kwan
- Issue Date
- 2010
- Publisher
- JAPAN SOC APPLIED PHYSICS
- Citation
- JAPANESE JOURNAL OF APPLIED PHYSICS, v.49, no.4
- Journal Title
- JAPANESE JOURNAL OF APPLIED PHYSICS
- Volume
- 49
- Number
- 4
- ISSN
- 0021-4922
- Abstract
- The authors have demonstrated hybrid white organic light-emitting diodes (WOLEDs) using 1,4-bis[2-(7-N-diphenyamino-2-(9,9-diethyl-9H-fluoren2-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 l'Eclairage coordinates of (0.43, 0.39) at 1000 cd/m(2). (C) 2010 The Japan Society of Applied Physics
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Related Researcher
- Kim, Young Kwan
- Engineering (Applied Science)