Efficient solution-processed blue phosphorescent organic light-emitting diodes with halogen-free solvent to optimize the emissive layer morphology

doi:10.1016/j.orgel.2014.04.005

CORC > 化学研究所 > 中国科学院化学研究所

	Efficient solution-processed blue phosphorescent organic light-emitting diodes with halogen-free solvent to optimize the emissive layer morphology
	Liu, Lihui 1,2; Liu, Xuejing 1,2; Wu, Keqi 1,2; Ding, Junqiao 1; Zhang, Baohua 1; Xie, Zhiyuan 1; Wang, Lixiang 1
刊名	ORGANIC ELECTRONICS
	2014-07-01
卷号	15 期号:7 页码:1401-1406
关键词	Organic Light-emitting Diodes Solution Process Halogen-free Solvent Film Morphology
ISSN号	1566-1199
DOI	10.1016/j.orgel.2014.04.005
英文摘要	Efficient solution-processed blue phosphorescent organic light-emitting diodes (OLEDs) featuring with halogen-free solvent processing are fabricated in this study. The organic molecule 3,6-bis(diphenylphosphoryl)-9-(4 '-(diphenylphosphoryl) phenyl)-carbazole (TPCz) that possesses good solubility in halogen-free polar solvents is selected to serve as the host of blue phosphorescent iridium(III) [bis(4,6-difluorophenyl)-pyridinato-N,C-2]-picolinate (FIrpic) dopant. The morphology of the TPCz: FIrpic emissive layer prepared with different polar solvents including chlorobenzene (CB), n-butanol (ButA) and isopropanol (IPA) and the effect on their electroluminescent performance have been investigated in detail. It is found that the more polar halogen-free solvent IPA restrains the FIrpic aggregation and renders a more densely packed emissive layer as compared to the CB-processed counterpart, which results in the enhanced electroluminescent performance. The luminous efficiency and power efficiency of the blue phosphorescent OLEDs prepared with CB are merely 5.7 cd/A and 3.3 lm/W, respectively. When using more polar halogen-free solvent IPA, the efficiencies are enhanced to 22.3 cd/A and 15.6 lm/W, about 2.9 and 3.7-time increment, respectively. This work provides an approach to fabricate efficient solution-processed phosphorescent OLEDs with environmental-friendly solvents, which is highly required in large-scale solution-processed manufacturing. (C) 2014 Elsevier B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000336543500013
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/51961]
专题	中国科学院化学研究所
通讯作者	Zhang, Baohua
作者单位	1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Liu, Lihui,Liu, Xuejing,Wu, Keqi,et al. Efficient solution-processed blue phosphorescent organic light-emitting diodes with halogen-free solvent to optimize the emissive layer morphology[J]. ORGANIC ELECTRONICS,2014,15(7):1401-1406.
APA	Liu, Lihui.,Liu, Xuejing.,Wu, Keqi.,Ding, Junqiao.,Zhang, Baohua.,...&Wang, Lixiang.(2014).Efficient solution-processed blue phosphorescent organic light-emitting diodes with halogen-free solvent to optimize the emissive layer morphology.ORGANIC ELECTRONICS,15(7),1401-1406.
MLA	Liu, Lihui,et al."Efficient solution-processed blue phosphorescent organic light-emitting diodes with halogen-free solvent to optimize the emissive layer morphology".ORGANIC ELECTRONICS 15.7(2014):1401-1406.