Fig. 1: Design strategy.

Schematic representation of the strategy developed in this work: employing D-A type TADF materials (lower left) with rapid kRISC as the blue emitter and MR-TADF materials (lower right) with fast kr as the yellow emitter. B, Y, D, A, kRISC, kISC, and kr refer to blue emitter, yellow emitter, donor, acceptor, reverse intersystem crossing rate, intersystem crossing rate, and radiative decay rate, respectively.