Acridin-9(10H)-one based thermally activated delayed fluorescence material: simultaneous optimization of RISC and radiation processes to boost luminescence efficiency

The high radiation and RISC rate constants were achieved simultaneously for a TADF emitter with acridin-9(10H)-one as acceptor due to high molecular rigidity and multichannel RISC processes, OLED with this TADF emitter exhibits a high EQE of 30.6%.