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A series of pyrimidine-conjugated thermally activated delayed fluorescent (TADF) emitters is developed. Using a highly emissive green pyrimidine conjugate emitter and sophisticated device engineering, the optimized device operates on 2.2 V at 1 cd m−2 and exhibits a superior performance with an ηext of over 25%, an ηp of over 110 lm W−1, and exceptionally low efficiency roll-off.
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Komatsu et al. (2016) studied this question.
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