A 2-phenylfuro[2,3-b]quinoxaline-triphenylamine-based emitter: photophysical properties and application in TADF-sensitized fluorescence OLEDs

We have demonstrated that the T 1 -state energy of a fluorescence dopant (FD) is close to that of the thermally activated delayed fluorescence (TADF)-type exciplex co-host, and the energy loss caused by the T 1 states of the FD could be suppressed in TADF-sensitized fluorescence (TSF) OLEDs.