%0 Journal Article
%A Liu, Wei
%A Zheng, Cai-Jun
%A Wang, Kai
%A Chen, Zhan
%A Chen, Dong-Yang
%A Li, Fan
%A Ou, Xue-Mei
%A Dong, Yu-Ping
%A Zhang, Xiao-Hong
%D 2015
%T Novel Carbazol-Pyridine-Carbonitrile Derivative as
Excellent Blue Thermally Activated Delayed Fluorescence Emitter for
Highly Efficient Organic Light-Emitting Devices
%U https://acs.figshare.com/articles/journal_contribution/Novel_Carbazol_Pyridine_Carbonitrile_Derivative_as_Excellent_Blue_Thermally_Activated_Delayed_Fluorescence_Emitter_for_Highly_Efficient_Organic_Light_Emitting_Devices/2135788
%R 10.1021/acsami.5b05648.s001
%2 https://acs.figshare.com/ndownloader/files/3769624
%K CPC
%K power efficiency
%K OLED
%K carbazole groups
%K Fluorescence Emitter
%K pyridine core
%K quantum efficiency
%K TADF emitter
%K Excellent Blue Thermally Activated
%K 47.7 cd
%K fairish photoluminescence quantum
%X A novel
blue thermally activated delayed fluorescence (TADF) emitter, CPC
(2,6-di(9H-carbazol-9-yl)-4-phenylpyridine-3,5-dicarbonitrile),
was designed and synthesized. By directly linking carbazole (to serve
as electron-donor) and pyridine-3,5-dicarbonitrile (to serve as electron-acceptor),
and distributing cyanogroups and carbazole groups at the para-position
of pyridine core, CPC successfully achieves an extremely small singlet–triplet
splitting and fairish photoluminescence quantum yield, thus can act
as the highly efficient blue TADF emitter. The optimized organic light-emitting
diode (OLED) based on 13 wt % CPC doped in mCP (1,3-bis(9H-carbazol-9-yl)benzene) host exhibits maximum current efficiency,
power efficiency, and external quantum efficiency of 47.7 cd A–1, 42.8 lm W–1, and 21.2%, respectively,
which are the best results in reported blue TADF-based devices up
to date and even comparable with the best reported blue phosphorescent
OLEDs.
%I ACS Publications