High-Performance Red, Green, and Blue Electroluminescent Devices Based on Blue Emitters with Small Singlet-Triplet Splitting and Ambipolar Transport Property

	High-Performance Red, Green, and Blue Electroluminescent Devices Based on Blue Emitters with Small Singlet-Triplet Splitting and Ambipolar Transport Property
	Wang K ; Zhao FC ; Wang CG ; Chen SY ; Chen D ; Zhang HY ; Liu Y ; Ma DG ; Wang Y
刊名	advanced functional materials
	2013
卷号	23 期号:21 页码:2672-2680
关键词	LIGHT-EMITTING-DIODES LOW DRIVING VOLTAGE EFFICIENCY ROLL-OFF ACTIVATED DELAYED FLUORESCENCE PHOSPHINE OXIDE HOSTS PHOSPHORESCENT OLEDS IRIDIUM COMPLEXES MOLECULAR DESIGN BIPOLAR HOST CONJUGATED POLYMERS
ISSN号	1616-301x
通讯作者	wang k
中文摘要	two coordination complex emitters as well as host materials be(ppi)2 and zn(ppi)2 (ppi = 2-(1-phenyl-1h-phenanthro[9,10-d]imidazol-2-yl)phenol) are designed, synthesized, and characterized. the incorporation of the metal atom leads to a twisted conformation and rigid molecular structure, which improve the thermal stability of be(ppi)2 and zn(ppi)2 with high td and tg at around 475 and 217 degrees c, respectively. the introduction of the electron-donating phenol group results in the emission color shifting to the deep-blue region and the emission maximum appears at around 429 nm. this molecular design strategy ensures that the highest occupied molecular orbital (homo) and lowest unoccupied molecular orbital (lumo) homo and lumo of be(ppi)2 and zn(ppi)2 localize on the different moieties of the molecules. therefore, the two complexes have an ambipolar transport property and a small singlet-triplet splitting of 0.35 ev for be(ppi)2 and 0.21 ev for zn(ppi)2. an undoped deep-blue fluorescent organic light-emitting device (oled) that uses be(ppi)2 as emitter exhibits a maximum power efficiency of 2.5 lm w-1 with the cie coordinates of (0.15, 0.09), which are very close to the national television standards committee (ntsc) blue standard (cie: 0.14, 0.08). green and red phosphorescent oleds (pholeds) that use be(ppi)2 and zn(ppi)2 as host materials show high performance. highest power efficiencies of 67.5 lm w-1 for green pholeds and 21.7 lm w-1 for red pholeds are achieved. in addition, the be(ppi)2-based devices show low-efficiency roll-off behavior, which is attributed to the more balanced carrier-transport property of be(ppi)2.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000319824200001
公开日期	2014-04-15
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/49804]
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	Wang K,Zhao FC,Wang CG,et al. High-Performance Red, Green, and Blue Electroluminescent Devices Based on Blue Emitters with Small Singlet-Triplet Splitting and Ambipolar Transport Property[J]. advanced functional materials,2013,23(21):2672-2680.
APA	Wang K.,Zhao FC.,Wang CG.,Chen SY.,Chen D.,...&Wang Y.(2013).High-Performance Red, Green, and Blue Electroluminescent Devices Based on Blue Emitters with Small Singlet-Triplet Splitting and Ambipolar Transport Property.advanced functional materials,23(21),2672-2680.
MLA	Wang K,et al."High-Performance Red, Green, and Blue Electroluminescent Devices Based on Blue Emitters with Small Singlet-Triplet Splitting and Ambipolar Transport Property".advanced functional materials 23.21(2013):2672-2680.