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Dibenzo[a,j]phenazine-Cored Donor-Acceptor-Donor Compounds As Green-to-Red/NIR Thermally Activated Delayed Fluorescence Organic Light Emitters

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Specialty Chemistry
Date 2016 Apr 10
PMID 27060474
Citations 39
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Abstract

A new family of thermally activated delayed fluorescence (TADF) emitters based on U-shaped D-A-D architecture with a novel accepting unit has been developed. All investigated compounds have small singlet-triplet energy splitting (ΔEST ) ranging from 0.02 to 0.20 eV and showed efficient TADF properties. The lowest triplet state of the acceptor unit plays the key role in the TADF mechanism. OLEDs fabricated with these TADF emitters achieved excellent efficiencies up to 16 % external quantum efficiency (EQE).

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