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
关键词	HOST MATERIALS DEVICES BLUE EXCITON PERFORMANCE ELECTROPHOSPHORESCENCE 30-PERCENT ORANGE
通讯作者	ma,dg
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
WOS记录号	WOS:000351871600009
公开日期	2016-05-31
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/65098]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
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.