Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 25, Pages 8405-8409Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201902264
Keywords
delayed fluorescence; full-color emission; solution-processed OLEDs; through-space charge transfer; white-light emission
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Funding
- National Key Research and Development Program of China [2017YFB0404402]
- National Natural Science Foundation of China [51833009, 51573182]
- 973 Project [2015CB655000]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2015180]
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Through-space charge transfer polymers (TSCT polymers) that contain a non-conjugated polystyrene backbone and spatially separated donor and acceptor units for solution-processed OLEDs with full-color and white emission is reported. By tuning the charge transfer strength between donor and acceptors with different electron-accepting ability, emission color spanning from deep blue to red can be achieved. By incorporating two kinds of donor/acceptor pairs in one polymer to create duplex through-space charge-transfer channels, blue and yellow emission can be simultaneously obtained to realize white electroluminescence from a single polymer. The TSCT polymers exhibit thermally activated delayed fluorescence effect with delayed-component lifetimes in range of 0.36-1.98 mu s, and unexpected aggregation-induced emission (emission intensity enhancement of up to 117 from solution to aggregation state).
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