Design of star-shaped molecular architectures based on carbazole and phosphine oxide moieties: towards amorphous bipolar hosts with high triplet energy for efficient blue electrophosphorescent devices

	Design of star-shaped molecular architectures based on carbazole and phosphine oxide moieties: towards amorphous bipolar hosts with high triplet energy for efficient blue electrophosphorescent devices
	Ding JQ ; Wang Q ; Zhao L ; Ma DG ; Wang LX ; Jing XB ; Wang FS
刊名	journal of materials chemistry
	2010
卷号	20 期号:37 页码:8126-8133
关键词	LIGHT-EMITTING DEVICES ORGANIC ELECTROPHOSPHORESCENCE IRIDIUM DENDRIMERS DIODES PHOSPHORESCENCE DERIVATIVES DENDRONS LAYER
ISSN号	0959-9428
通讯作者	wang lx
中文摘要	with a carbazole moiety as the electron donor and a phosphine-oxide moiety as the electron acceptor, two novel star-shaped bipolar hosts, 4,4',4 ''-tri(n-carbazolyl)triphenylphosphine oxide (tctp) and 3,6-bis(diphenylphosphoryl)-9-(4'-(diphenylphosphoryl)phenyl)carbazole (tpcz), have been designed and synthesized. their topology structure differences are that the phosphine-oxide moiety is located in the molecular centre and the periphery for tctp and tpcz, respectively. the star-shaped architecture imparts them with high decomposition temperatures (t-d: 497 degrees c for tctp and 506 degrees c for tpcz) and results in the formation of a stable amorphous glassy state (t-g: 163 degrees c for tctp and 143 degrees c for tpcz), while the phosphine oxide linkage ensures the disrupted conjugation and the high triplet energy (>3.0 ev). in addition, both tctp and tpcz possess a bipolar transporting capability. however, tctp mostly transports holes and tpcz primarily conducts electrons. on the basis of appropriate device configurations, high performance blue electrophosphorescent devices with comparable efficiency (35.0-36.4 cd a(-1), 15.9-16.7%) have been realized using tctp and tpcz as the host for the blue phosphor, respectively. compared with the unipolar host, 4,4',4 ''-tri(n-carbazolyl)triphenylamine (tcta, 15.9 cd a(-1), 7.8%), the efficiency is improved by more than two-fold. as far as the obtained state-of-the-art performance is concerned, we think that these novel materials should provide an avenue for the design of amorphous bipolar hosts with high triplet energy used for blue pholeds on a star-shaped scaffold.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000281726600032
公开日期	2012-04-25
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/43453]
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	Ding JQ,Wang Q,Zhao L,et al. Design of star-shaped molecular architectures based on carbazole and phosphine oxide moieties: towards amorphous bipolar hosts with high triplet energy for efficient blue electrophosphorescent devices[J]. journal of materials chemistry,2010,20(37):8126-8133.
APA	Ding JQ.,Wang Q.,Zhao L.,Ma DG.,Wang LX.,...&Wang FS.(2010).Design of star-shaped molecular architectures based on carbazole and phosphine oxide moieties: towards amorphous bipolar hosts with high triplet energy for efficient blue electrophosphorescent devices.journal of materials chemistry,20(37),8126-8133.
MLA	Ding JQ,et al."Design of star-shaped molecular architectures based on carbazole and phosphine oxide moieties: towards amorphous bipolar hosts with high triplet energy for efficient blue electrophosphorescent devices".journal of materials chemistry 20.37(2010):8126-8133.