Developing Through‐Space Charge Transfer Polymers as a General Approach to Realize Full‐Color and White Emission with Thermally Activated Delayed Fluorescence.

Autor: Hu, Jun, Li, Qiang, Wang, Xingdong, Shao, Shiyang, Wang, Lixiang, Jing, Xiabin, Wang, Fosong
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Zdroj: Angewandte Chemie; 6/17/2019, Vol. 131 Issue 25, p8493-8497, 5p
Abstrakt: 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 μs, and unexpected aggregation‐induced emission (emission intensity enhancement of up to 117 from solution to aggregation state). [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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