Bipolar Tetraarylsilanes as Universal Hosts for Blue, Green, Orange, and White Electrophosphorescence with High Efficiency and Low Efficiency Roll-Off

	Bipolar Tetraarylsilanes as Universal Hosts for Blue, Green, Orange, and White Electrophosphorescence with High Efficiency and Low Efficiency Roll-Off
	Gong SL ; Chen YH ; Luo JJ ; Yang CL ; Zhong C ; Qin JG ; Ma DG
刊名	advanced functional materials
	2011
卷号	21 期号:6 页码:1168-1178
关键词	LIGHT-EMITTING-DIODES TRIPHENYLAMINE-BENZIMIDAZOLE DERIVATIVES ORGANIC ELECTROLUMINESCENT DEVICES RED PHOSPHORESCENT OLEDS SINGLE-LAYER EMISSION DENSITY HYBRID CARRIER
ISSN号	1616-301x
通讯作者	gong sl
中文摘要	a series of tetraarylsilane compounds, namely p-bisitpa (1), m-bisitpa (2), p-oxdsitpa (3), m-oxdsitpa (4), are designed and synthesized by incorporating electron-donating arylamine and electron-accepting benzimidazole or oxadiazole into one molecule via a silicon-bridge linkage mode. their thermal, photophysical and electrochemical properties can be finely tuned through the different groups and linking topologies. the para-disposition compounds 1 and 3 display higher glass transition temperatures, slightly lower homo levels and triplet energies than their meta-disposition isomers 2 and 4, respectively. the silicon-interrupted conjugation of the electron-donating and electron-accepting segments gives these materials the following advantages: i) relative high triplet energies in the range of 2.69-2.73 ev; ii) homo/lumo levels of the compounds mainly depend on the electron-donating and electron-accepting groups, respectively; iii) bipolar transporting feature as indicated by hole-only and electron-only devices. these advantages make these materials ideal universal hosts for multicolor phosphorescent oleds. 1 and 3 have been demonstrated as universal hosts for blue, green, orange and white electrophosphorescence, exhibiting high efficiencies and low efficiency roll-off. for example, the devices hosted by 1 achieve maximum external quantum efficiencies of 16.1% for blue, 22.7% for green, 20.5% for orange, and 19.1% for white electrophosphorescence. furthermore, the external quantum efficiencies are still as high as 14.2% for blue, 22.4% for green, 18.9% for orange, and 17.4% for white electrophosphorescence at a high luminance of 1000 cd m(-2). the two-color, all-phosphor white device hosted by 3 acquires a maximum current efficiency of 51.4 cd a(-1), and a maximum power efficiency of 51.9 lm w(-1). these values are among the highest for single emitting layer white pholeds reported till now.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000288559100020
公开日期	2012-06-11
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/44752]
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	Gong SL,Chen YH,Luo JJ,et al. Bipolar Tetraarylsilanes as Universal Hosts for Blue, Green, Orange, and White Electrophosphorescence with High Efficiency and Low Efficiency Roll-Off[J]. advanced functional materials,2011,21(6):1168-1178.
APA	Gong SL.,Chen YH.,Luo JJ.,Yang CL.,Zhong C.,...&Ma DG.(2011).Bipolar Tetraarylsilanes as Universal Hosts for Blue, Green, Orange, and White Electrophosphorescence with High Efficiency and Low Efficiency Roll-Off.advanced functional materials,21(6),1168-1178.
MLA	Gong SL,et al."Bipolar Tetraarylsilanes as Universal Hosts for Blue, Green, Orange, and White Electrophosphorescence with High Efficiency and Low Efficiency Roll-Off".advanced functional materials 21.6(2011):1168-1178.