期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 78, 期 -, 页码 324-329出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2019.05.038
关键词
Hole transport material; Crosslink; Solution process; Curing; Quantum efficiency
资金
- Nano Materials Technology Development Program through the National Research Foundation of Korea - Ministry of Science, ICT, and Future Planning [2016M3A7B4909243]
A high triplet energy crosslinkable hole transport material was developed for solution processed blue phosphorescent organic light-emitting diodes. A high triplet energy core structure, 3,3-di(9H-carbazol-9-yl)biphenyl, was functionalized with a vinylbenzene crosslinking unit to form the crosslinked hole transport layer. Crosslinking of the hole transport layer at 220 degrees C produced an insoluble film which is stable under exposure to solvents. A blue emitting layer of iridium(III) bis(2-(4,6-difluorophenyl)-pyridinato-N,C2)picolinate doped diphenyldi(4-(9-carbazolyl)phenyl)silane was spin-coated on the crosslinked hole transport layer without damaging the underlying hole transport layer, which afforded solution processed blue phosphorescent organic light-emitting diodes with an external quantum efficiency of 19.1%. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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