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Management of Singlet and Triplet Excitons: A Universal Approach to High‐Efficiency All Fluorescent WOLEDs with Reduced Efficiency Roll‐Off Using a Conventional Fluorescent Emitter
Author(s) -
Wu Zhongbin,
Yu Ling,
Zhou Xiaokang,
Guo Qingxun,
Luo Jiajia,
Qiao Xianfeng,
Yang Dezhi,
Chen Jiangshan,
Yang Chuluo,
Ma Dongge
Publication year - 2016
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201600117
Subject(s) - fluorescence , common emitter , oled , quantum efficiency , exciton , materials science , electrical efficiency , optoelectronics , nanotechnology , power (physics) , optics , physics , layer (electronics) , quantum mechanics
High‐efficiency all‐fluorescent white organic light‐emitting diodes (WOLEDs) are demonstrated by employing a blue thermally activated delayed fluorescent as the host or assistant dopant and a conventional orange emitter. The resulting warm WOLEDs, using thermally activated delayed fluorescence as the host, show a record external quantum efficiency of 14.0% and a power efficiency of 48.0 lm W −1 , together with an extremely low efficiency roll‐off.