High-performance blue and green electrophosphorescence achieved by using carbazole-containing bipolar tetraarylsilanes as host materials

	High-performance blue and green electrophosphorescence achieved by using carbazole-containing bipolar tetraarylsilanes as host materials
	Gong SL ; Chen YH ; Zhang X ; Cai PJ ; Zhong C ; Ma DG ; Qin JG ; Yang CL
刊名	journal of materials chemistry
	2011
卷号	21 期号:30 页码:11197-11204
关键词	LIGHT-EMITTING DEVICES TRIPHENYLAMINE-BENZIMIDAZOLE DERIVATIVES ORGANIC ELECTROLUMINESCENT DEVICES PHOSPHORESCENT OLEDS EFFICIENT BLUE SINGLE-LAYER TRIPLET ENERGY DENSITY DIODES TRANSPORT
ISSN号	0959-9428
通讯作者	ma dg
中文摘要	a series of carbazole-containing tetraarylsilane compounds, namely p-bisipcz (1), m-bisipcz (2), p-oxdsipcz (3) and m-oxdsipcz (4) were designed and synthesized by incorporating electron-donating carbazole 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 di-para-position compounds 1 and 3 display higher glass transition temperatures and slightly lower triplet energies than their di-meta-position isomers 2 and 4, respectively. the four compounds exhibit similar homo levels (5.60-5.63 ev), while the lumo level of 3 (2.36 ev) is slightly lower than that of 4 (2.28 ev). the silicon-interrupted conjugation of the electron-donating and electron-accepting segments endows these materials with relative high triplet energies, good thermal and morphological stability, and bipolar transporting ability. for firpic-based blue pholeds, the di-meta-position compounds 2 and 4 display better device performances than their di-para-position analogues 1 and 3, respectively. device b using 2 as the host exhibits the best performance with a maximum current efficiency of 29.3 cd a(-1), a maximum power efficiency of 19.8 lm w(-1), and a maximum external quantum efficiency of 11.4%. green phosphorescent devices using (ppy)(2)ir(acac) as guest and 1-4 as hosts show excellent el performances with maximum external quantum efficiencies of 18.3-22.2%. remarkably, device h hosted by 4 still exhibits an external quantum efficiency of 19.4% at the extremely high luminance of 10 000 cd m (2). these efficiencies are significantly higher than those of blue and green control devices using mcp as host, respectively.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000292974400022
公开日期	2012-06-11
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/44966]
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,Zhang X,et al. High-performance blue and green electrophosphorescence achieved by using carbazole-containing bipolar tetraarylsilanes as host materials[J]. journal of materials chemistry,2011,21(30):11197-11204.
APA	Gong SL.,Chen YH.,Zhang X.,Cai PJ.,Zhong C.,...&Yang CL.(2011).High-performance blue and green electrophosphorescence achieved by using carbazole-containing bipolar tetraarylsilanes as host materials.journal of materials chemistry,21(30),11197-11204.
MLA	Gong SL,et al."High-performance blue and green electrophosphorescence achieved by using carbazole-containing bipolar tetraarylsilanes as host materials".journal of materials chemistry 21.30(2011):11197-11204.