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45‐4: Approach for Attaining Short Exciton Lifetime in Thermally Activated Delayed Fluorescence Emitters
Author(s) -
Lampande Raju,
Kim Gyeong Heon,
Im Joon Beom,
Kim Kwang Jong,
Lee Ju Young,
Kwon Jang Hyuk
Publication year - 2017
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.11724
Subject(s) - exciton , fluorescence , quantum efficiency , photoluminescence , optoelectronics , materials science , singlet state , diode , photochemistry , oled , energy transfer , molecular physics , optics , chemistry , atomic physics , nanotechnology , physics , excited state , condensed matter physics , layer (electronics)
We report an approach to achieve short delayed fluorescence exciton lifetime in efficient green and blue thermally activated delayed fluorescence (TADF) emitters. The synthesized TADF emitters show small singlet‐triplet energy splitting, high photoluminescence quantum yields, and proper charge transfer characteristics, resulting in short delayed fluorescence exciton lifetime. The fabricated organic light emitting diodes with green and deep blue TADF emitters display maximum external quantum efficiency of 31.4% and 22.5%, respectively, and significantly low efficiency roll‐off characteristics.