Managing Charge Balance and Triplet Excitons to Achieve High-Power-Efficiency Phosphorescent Organic Light-Emitting Diodes

	Managing Charge Balance and Triplet Excitons to Achieve High-Power-Efficiency Phosphorescent Organic Light-Emitting Diodes
	Tao YT ; Wang QA ; Yang CL ; Qin JG ; Ma DG
刊名	acs applied materials & interfaces
	2010
卷号	2 期号:10 页码:2813-2818
关键词	CYCLOMETALATED IRIDIUM COMPLEXES BLUE ELECTROPHOSPHORESCENT DEVICES HOST MATERIAL ELECTROLUMINESCENT DEVICES BIPOLAR HOST GREEN EMISSION MOLECULE VOLTAGES HYBRID
ISSN号	1944-8244
通讯作者	yang cl
中文摘要	high-efficiency phosphorescent organic light-emitting diodes (pholeds) have been achieved by using an ortho-linked triphenylamine/oxadiazole hybrid, namely p-tpa-o-oxd, as host material. the high homo level of the compound (5.25 ev) can facilitate efficient hole injection from 1, 4-bis[(1-naphthylphenyl)amino]biphenyl (npb) layer to the emissive layer. as a result, low driving voltages and high power efficiencies have been attained as compared to the carbazole-based hosts with lower homo levels and higher injection barriers under similar device structures. by introducing 1,3,5-tris(n-phenylbenzimidazol-2-yl)benzene (tpbi) to replace 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (bcp)/tris(8-hydroxyquinoline)aluminum (alq3) as hole blocking/electron transporting layer, followed by tuning the thicknesses of hole-transport npb layer to manipulate the charge balance, high-efficiency pholeds have been achieved, with maximum current efficiency/power efficiency/external quantum efficiency of 85.7 cd/a/99.7 lm/w/22.2% for green (ppy)(2)ir(acac)-based devices, 55.2 cd/a/64.2 lm/w/19.0% for yellow (fbi)(2)ir(acac)-based devices, and 11.4 cd/a/11.8 lm/w/14.8% for deep red (piq)(2)ir(acac)-based devices. by inserting 10 nm of p-tpa-o-oxd as self-triplet exciton blocking layer between hole transporting and emissive layer to confine triplet excitons, device performances have been further improved in green pholed, with peak current efficiency/power efficiency/external quantum efficiency of 90.0 cd/a/97.7 lm/w/23.5%.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000283463700023
公开日期	2012-04-25
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/43330]
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	Tao YT,Wang QA,Yang CL,et al. Managing Charge Balance and Triplet Excitons to Achieve High-Power-Efficiency Phosphorescent Organic Light-Emitting Diodes[J]. acs applied materials & interfaces,2010,2(10):2813-2818.
APA	Tao YT,Wang QA,Yang CL,Qin JG,&Ma DG.(2010).Managing Charge Balance and Triplet Excitons to Achieve High-Power-Efficiency Phosphorescent Organic Light-Emitting Diodes.acs applied materials & interfaces,2(10),2813-2818.
MLA	Tao YT,et al."Managing Charge Balance and Triplet Excitons to Achieve High-Power-Efficiency Phosphorescent Organic Light-Emitting Diodes".acs applied materials & interfaces 2.10(2010):2813-2818.