Simultaneous Optimization of Charge-Carrier Balance and Luminous Efficacy in Highly Efficient White Polymer Light-Emitting Devices

White polymer light‐emitting devices with a peak forward‐viewing power efficiency close to 40 lm W−1, corresponding to an external quantum efficiency of 28.8% and a luminous efficiency of 60 cd A−1, are demonstrated. The devices are based on two newly synthesized yellow‐emitting iridium complexes fu...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2011-07, Vol.23 (26), p.2976-2980
Main Authors: Zou, Jianhua, Wu, Hao, Lam, Ching-Shan, Wang, Chuandao, Zhu, Jing, Zhong, Chengmei, Hu, Sujun, Ho, Cheuk-Lam, Zhou, Gui-Jiang, Wu, Hongbin, Choy, Wallace C. H., Peng, Junbiao, Cao, Yong, Wong, Wai-Yeung
Format: Article
Language:English
Subjects:
Coordination Complexes - chemistry
Fluorenes - chemistry
Iridium - chemistry
Polymers - chemistry
Quantum Theory
Semiconductors
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Summary:White polymer light‐emitting devices with a peak forward‐viewing power efficiency close to 40 lm W−1, corresponding to an external quantum efficiency of 28.8% and a luminous efficiency of 60 cd A−1, are demonstrated. The devices are based on two newly synthesized yellow‐emitting iridium complexes functionalized with the sterically hindered diarylfluorene chromophores and are fabricated by a simple solution‐processing method.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201101130