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Molecular Crystals and Liquid Crystals Volume 514, 2009 - Issue 1: The 12th International Symposium on Advanced Display Materials and Devices (ADMD 2008) Part II of II
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Original Articles

Host Engineering for High Efficiency in Phosphorescent White Organic Light-Emitting Diodes

Kyoung Soo Yook Department of Polymer Science and Engineering, Dankook University, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, Korea
,
Soon Ok Jeon Department of Polymer Science and Engineering, Dankook University, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, Korea
,
Chul Woong Joo Department of Polymer Science and Engineering, Dankook University, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, Korea
&
Jun Yeob Lee Department of Polymer Science and Engineering, Dankook University, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, KoreaCorrespondence[email protected]
Pages 140/[470]-146/[476] | Published online: 10 Nov 2009
 
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Abstract

High efficiency phosphorescent white organic light emitting diodes (PHWOLEDs) were fabricated by controlling the charge transport properties of host materials. Blue/red/blue stack structure was used and the use of hole transport type host material in red emitting layer was effective to improve the quantum efficiency of PHWOLEDs. High quantum efficiency of 12.2% was obtained in PHWOLEDs.

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