Greenish yellow organic light emitting devices based on novel iridium complexes containing 2-cyclohexenyl-1-phenyl-1H-benzo[d]imidazole

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	Greenish yellow organic light emitting devices based on novel iridium complexes containing 2-cyclohexenyl-1-phenyl-1H-benzo[d]imidazole
	Zhang, DY(张东煜)
刊名	DYES AND PIGMENTS
	2013-12
卷号	99 期号:3 页码:1010-1015
关键词	Organic light emitting devices Greenish yellow phosphorescence 2-Cyclohexenyl-1-phenyl-1H-benzo[d]imidazole
通讯作者	Yang, RQ
英文摘要	2-Cyclohexenyl-1-phenyl-1H-benzo[d]imidazole (Hcyclopbi) and its heterocyclometalated iridium complexes bis[2-cyclohexenyl-1-phenyl-1H-benzo[d]imidazole](acetylacetonate)iridium(III) [(cyclopbi)(2)Iracac] and bis[2-cyclohexenyl-1-phenyl-1H-benzo[d]imidazole][2-(3-(trifluoromethyl)-1H-pyrazol-5-yl)pyridinate]iridium(III) [(cyclopbi)(2)IrCF3] were firstly designed and synthesized. Owing to the strong electron withdrawing ability of 2-(3-(trifluoromethyl)-1H-pyrazol) compared to that of acetylacetonate, blue shifted phosphorescence 542 nm was obtained for (cyclopbi)(2)IrCF3 compared to that of (cyclopbi)(2)Iracac 545 nm with photoluminescence quantum yields (phi) 0.22 and 0.25, respectively, as well the highest occupied molecular orbit (HOMO) energy level was estimated to be -5.10 eV for (cyclopbi)(2)IrCF3, 0.19 eV lower than that of -4.91 eV for (cyclopbi)(2)Iracac. When (cyclopbi)(2)Iracac was doped into 4,4'-bis(9H-carbazol-9-yl)biphenyl (CBP) as the emitting layer, high efficiency organic light emitting devices (OLEDs) were obtained with maximum current efficiency (eta(c)) 22.3 cd/A at 3.1 mA/cm(2) and maximum brightness 16,300 cd/m(2) at 171.6 mA/cm(2), which were comparable to those of bis(2-phenylpyridine)(acetylacetonate)iridium(III) [(ppy)(2)Iracac] with the same device structure. This results indicate that (cyclopbi)(2)Iracac and (cyclopbi)(2)IrCF3 are potential phosphorescent dyes used for OLEDs. (C) 2013 Elsevier Ltd. All rights reserved.
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000327560200065
公开日期	2014-01-13
内容类型	期刊论文
源URL	[http://ir.sinano.ac.cn/handle/332007/1287]
专题	苏州纳米技术与纳米仿生研究所_印刷电子学部_崔铮团队
推荐引用方式 GB/T 7714	Zhang, DY. Greenish yellow organic light emitting devices based on novel iridium complexes containing 2-cyclohexenyl-1-phenyl-1H-benzo[d]imidazole[J]. DYES AND PIGMENTS,2013,99(3):1010-1015.
APA	Zhang, DY.(2013).Greenish yellow organic light emitting devices based on novel iridium complexes containing 2-cyclohexenyl-1-phenyl-1H-benzo[d]imidazole.DYES AND PIGMENTS,99(3),1010-1015.
MLA	Zhang, DY."Greenish yellow organic light emitting devices based on novel iridium complexes containing 2-cyclohexenyl-1-phenyl-1H-benzo[d]imidazole".DYES AND PIGMENTS 99.3(2013):1010-1015.