Regulation of Aggregation-enhanced Thermally Activated Delayed Fluorescence in Butterfly-shaped Donors-Acceptor Conjugates

Abstract

We studied how ether-linked benzophenone and dibenzofuran/dibenzothiophene-functionalized benzophenone as auxiliary groups in carbazoles-phthalonitrile conjugates influence aggregation-enhanced thermally activated delayed fluorescence (AE-TADF). CDBFPN and CDBFPN exhibited AE-TADF due to their unique butterfly-shaped geometries. In contrast, CBPN faces aggregation-caused quenching, underscoring the critical role of these functionalized groups in boosting blue TADF properties.