Enhanced Electroluminescence from a Thermally Activated Delayed-Fluorescence Emitter by Suppressing Nonradiative Decay

Abstract

Thermally activated delayed-fluorescence (TADF) emitters have attracted increasing attention as third-generation electroluminescent materials for organic light-emitting diodes. This study presents a design strategy for highly efficient TADF emitters, guided by quantum-chemistry calculations of radiative and nonradiative decay rates. By optimizing HOMO-LUMO overlap density and suppressing nonradiative decay, the authors develop a purely organic emitter with very high quantum yields from photoluminescence and electroluminescence.