Reduced efficiency roll-off in all-phosphorescent white organic light-emitting diodes with an external quantum efficiency of over 20%

	Reduced efficiency roll-off in all-phosphorescent white organic light-emitting diodes with an external quantum efficiency of over 20%
	Zhu, Liping; Wu, Zhongbin; Chen, Jiangshan; Ma, Dongge
刊名	JOURNAL OF MATERIALS CHEMISTRY C
	2015
卷号	3 期号:14 页码:3304-3310
英文摘要	Although previously reported all-phosphorescent white organic light-emitting diodes (WOLEDs) exhibit impressive electroluminescence efficiencies, problems remain in terms of the severe efficiency roll-off at high brightness. Here, a smart design of the emissive zone structure is presented to make full use of generated excitons to realize high efficiency all-phosphorescent WOLEDs with reduced efficiency roll-off. The fabricated WOLED shows a maximum power efficiency (PE) of 46.6 lm W-1, a current efficiency (CE) of 46.4 cd A(-1) and an external quantum efficiency (EQE) of 22.4%. These values remain as high as 41.3 lm W-1, 46.2 cd A(-1) and 22.0%, respectively, at a brightness of 1000 cd m(-2), exhibiting less pronounced efficiency roll-off. The critical current density, where the EQE declines by half from its peak, reaches 220 mA cm(-2), which should be a high value for all-phosphorescent WOLEDs with an external quantum efficiency of over 20%.
收录类别	SCI
语种	英语
公开日期	2015-11-03
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/28497]
专题	化学研究所_高分子物理与化学实验室
作者单位	Chinese Acad Sci, Grad Univ, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Liping,Wu, Zhongbin,Chen, Jiangshan,et al. Reduced efficiency roll-off in all-phosphorescent white organic light-emitting diodes with an external quantum efficiency of over 20%[J]. JOURNAL OF MATERIALS CHEMISTRY C,2015,3(14):3304-3310.
APA	Zhu, Liping,Wu, Zhongbin,Chen, Jiangshan,&Ma, Dongge.(2015).Reduced efficiency roll-off in all-phosphorescent white organic light-emitting diodes with an external quantum efficiency of over 20%.JOURNAL OF MATERIALS CHEMISTRY C,3(14),3304-3310.
MLA	Zhu, Liping,et al."Reduced efficiency roll-off in all-phosphorescent white organic light-emitting diodes with an external quantum efficiency of over 20%".JOURNAL OF MATERIALS CHEMISTRY C 3.14(2015):3304-3310.