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High‐Efficiency Blue Organic Light‐Emitting Diodes Based on Thermally Activated Delayed Fluorescence from Phenoxaphosphine and Phenoxathiin Derivatives
Author(s) -
Lee Sae Youn,
Adachi Chihaya,
Yasuda Takuma
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201506391
Subject(s) - oled , electroluminescence , materials science , fluorescence , diode , acceptor , optoelectronics , nanotechnology , optics , physics , layer (electronics) , condensed matter physics
High‐efficiency blue thermally activated delayed fluorescence (TADF) molecules , consisting of phenoxaphosphine oxide and phenoxathiin dioxide as acceptor units and 9,9‐dimethylacridan as a donor unit, are reported. Maximum external electroluminescence quantum efficiencies of up to 20.5% are achieved in blue organic light‐emitting diodes (OLEDs) by employing these materials as TADF emitters.