期刊
APPLIED PHYSICS LETTERS
卷 101, 期 9, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4749278
关键词
-
资金
- Science and Engineering Research Council
- Agency for Science, Technology and Research (A-STAR) of Singapore [092 101 0057]
- National Research Foundation of Singapore [NRF-CRP-6-2010-2, NRF-RF-2009-09]
- National Natural Science Foundation of China (NSFC) [61006037, 61177014, 61076015]
- Tianjin Natural Science foundation [11JCZDJC21900, 11JCYDJC25800]
We reported phosphorescent organic light-emitting diodes with internal quantum efficiency near 100% with significantly reduced efficiency roll-off. It was found that the use of different hole transporting layer (HTL) affects the exciton distribution in the emission region significantly. Our best device reaches external quantum efficiency (EQE), current, and power efficiency of 22.8% +/- 0.1%, 78.6 +/- 0.2 cd/A, 85 +/- 2 lm/W, respectively, with half current of 158.2 mA/cm(2). This considerably outperforms the control device with N,N'-bis(naphthalen-1-yl)-N,N'-bis(phenyl)-benzidine (NPB) (HTL) and 4,4'-N,N'-dicarbazole-biphenyl (host) with maximum EQE, current and power efficiency of 19.1% +/- 0.1%, 65.6 +/- 0.3 cd/A, 67 +/- 2 lm/W, respectively, with half current of only 8.1 mA/cm(2). (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4749278]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据