High efficiency blue PhOLEDs using spiro-annulated triphenylamine/fluorene hybrids as host materials with high triplet energy, high HOMO level and high T-g

doi:10.1016/j.orgel.2014.10.009

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	High efficiency blue PhOLEDs using spiro-annulated triphenylamine/fluorene hybrids as host materials with high triplet energy, high HOMO level and high T-g
	Liu, Tengxiao 1; Sun, Hengda 2; Fan, Cong 1; Ma, Dongge 2; Zhong, Cheng 1; Yang, Chuluo 1
刊名	ORGANIC ELECTRONICS
	2014-12-01
卷号	15 期号:12 页码:3568-3576
关键词	Ortho-linkage Host Materials Blue Phosphorescence Organic Light-emitting Diodes Spiro(Acridine-9 9'-fluorene)
ISSN号	1566-1199
DOI	10.1016/j.orgel.2014.10.009
英文摘要	Two spiro-annulated triphenylamine/fluorene oligomers, namely 4'-(9,9'-spirobifluoren-4-yl)-10-phenyl-10H-spiro[acridine-9,9'- fluorene] (NSF-SF), and 4,4'-di(spiro(triphenylamine-9,9'- fluorene)-2-yl)-spiro(triphenylamine-9,9'-fluorene) (NSF-NSF), are designed and synthesized. Their thermal, electrochemical and photophysical properties were investigated. The introduction of spiro-annulated triphenylamine moieties assurances the high HOMO energy levels of NSF-NSF and NSF-SF at -5.31 eV and -5.33 eV, respectively, which accordingly facilitates the hole injection from nearby hole-transporting layer. Meanwhile, the perpendicular arrangement of the spiro-conformation and the full ortho-linkage effectively prevents the extension of the p-conjugation and consequently guarantees their high triplet energies of 2.83 eV. Phosphorescent organic light-emitting devices (PhOLEDs) with the configurations of ITO/MoO3/TAPC/EML/TmPyPB/LiF/Al were fabricated by using the two compounds as host materials and bis[2-(4',6'-difluorophenyl)pyridinato-N, C-2'] iridium(III) picolate (FIrpic) as the dopant. The turn-on voltage of the device B based on NSF-NSF was 2.8 V. Simultaneously, the device exhibited excellent performance with the maximum current efficiency of 41 cd A(-1), the maximum power efficiency of 42 lmW(-1) and the maximum external quantum efficiency (EQE) of 19.1%. At a high brightness of 1000 cd m(-2), the device remained EQE of 16.2% and the roll-off value of external quantum efficiency is 15%. (C) 2014 Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000345649200022
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/51503]
专题	中国科学院化学研究所
通讯作者	Ma, Dongge
作者单位	1.Wuhan Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
推荐引用方式 GB/T 7714	Liu, Tengxiao,Sun, Hengda,Fan, Cong,et al. High efficiency blue PhOLEDs using spiro-annulated triphenylamine/fluorene hybrids as host materials with high triplet energy, high HOMO level and high T-g[J]. ORGANIC ELECTRONICS,2014,15(12):3568-3576.
APA	Liu, Tengxiao,Sun, Hengda,Fan, Cong,Ma, Dongge,Zhong, Cheng,&Yang, Chuluo.(2014).High efficiency blue PhOLEDs using spiro-annulated triphenylamine/fluorene hybrids as host materials with high triplet energy, high HOMO level and high T-g.ORGANIC ELECTRONICS,15(12),3568-3576.
MLA	Liu, Tengxiao,et al."High efficiency blue PhOLEDs using spiro-annulated triphenylamine/fluorene hybrids as host materials with high triplet energy, high HOMO level and high T-g".ORGANIC ELECTRONICS 15.12(2014):3568-3576.