Manipulating Förster and Dexter interactions between a thermally activated delayed fluorescence host and a phosphorescent dopant for highly efficient solution-processed red and white OLEDs

A blue TADF host with and without steric hindrances was utilized to manipulate Fӧrster and Dexter interactions with a red phosphorescent iridium complex, realizing the state-of-the-art PhOLEDs with a sufficiently high EQE of 22.2%.