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Controlling Singlet–Triplet Energy Splitting for Deep‐Blue Thermally Activated Delayed Fluorescence Emitters
Author(s) -
Cui LinSong,
Nomura Hiroko,
Geng Yan,
Kim Jong Uk,
Nakanotani Hajime,
Adachi Chihaya
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201609459
Subject(s) - fluorescence , oled , acceptor , singlet state , photochemistry , materials science , optoelectronics , chemistry , nanotechnology , optics , excited state , atomic physics , physics , layer (electronics) , condensed matter physics
The development of efficient metal‐free organic emitters with thermally activated delayed fluorescence (TADF) properties for deep‐blue emission is still challenging. A new family of deep‐blue TADF emitters based on a donor–acceptor architecture has been developed. The electronic interaction between donor and acceptor plays a key role in the TADF mechanism. Deep‐blue OLEDs fabricated with these TADF emitters achieved high external quantum efficiencies over 19.2 % with CIE coordinates of (0.148, 0.098).