Constructing Low-Triplet-Energy Hosts for Highly Efficient Blue PHOLEDs: Controlling Charge and Exciton Capture in Doping Systems

	Constructing Low-Triplet-Energy Hosts for Highly Efficient Blue PHOLEDs: Controlling Charge and Exciton Capture in Doping Systems
	Han CM ; Zhao FC ; Zhang Z ; Zhu LP ; Xu H ; Li J ; Ma DG ; Yan PF
刊名	chemistry of materials
	2013
卷号	25 期号:24 页码:4966-4976
关键词	LIGHT-EMITTING-DIODES PHOSPHINE-OXIDE HOSTS LOW DRIVING VOLTAGE ACTIVATED DELAYED FLUORESCENCE ELECTRON-TRANSPORT MATERIALS SHORT-AXIS SUBSTITUTION BIPOLAR HOST PHOSPHORESCENT OLEDS ROLL-OFF OPTOELECTRONIC PROPERTIES
ISSN号	0897-4756
通讯作者	xu h
中文摘要	with the aim to rationally figure out the significance of charge and exciton capture in the electrophosphorescent processes in low-triplet-energy hosts involved doping systems, the frontier molecular orbital (fmo) energy levels of a series low-triplet-energy hosts with diphenylphosphine oxide (dppo) and triphenylamine (tpa), collectively named dpe(x)potpa(n), were successfully and gradually tuned on the basis of their constant triplet energy levels (t-1) of 2.63 ev to get rid of interference from host-dopant energy transfer. it was showed that device efficiencies were directly proportional to the depths of carrier traps formed on the dopants and inversely proportional to the exciton capture ability of the hosts, which were evidenced by the highest external quantum efficiency of similar to 15% from firpic-based pholed of dpespotpa with the deepest hole and electron traps and the weakest exciton capture ability among dpe(x)potpa(n). this work not only demonstrated the great advantages and potential of this kind of host materials for low-driving-voltage application but also clarified the determinants of highly efficient low-triplet-energy hosts for blue pholeds, which are consequentially referable for purposeful molecular design.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000329137800016
公开日期	2014-04-14
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/49381]
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	Han CM,Zhao FC,Zhang Z,et al. Constructing Low-Triplet-Energy Hosts for Highly Efficient Blue PHOLEDs: Controlling Charge and Exciton Capture in Doping Systems[J]. chemistry of materials,2013,25(24):4966-4976.
APA	Han CM.,Zhao FC.,Zhang Z.,Zhu LP.,Xu H.,...&Yan PF.(2013).Constructing Low-Triplet-Energy Hosts for Highly Efficient Blue PHOLEDs: Controlling Charge and Exciton Capture in Doping Systems.chemistry of materials,25(24),4966-4976.
MLA	Han CM,et al."Constructing Low-Triplet-Energy Hosts for Highly Efficient Blue PHOLEDs: Controlling Charge and Exciton Capture in Doping Systems".chemistry of materials 25.24(2013):4966-4976.