Fig. 3: Device data for detecting exciton recombination zone.

a Device configuration for exciton recombination zone detecting. b Molecular structures of the functional materials applied in WOLEDs. c Absorption and PL spectra of TBRB in toluene solution and PL spectrum of TCP-BP-SFAC in neat film. d Relative intensity of TBRB/TCP-BP-SFAC versus position and voltage. Source data are provided as a Source Data file.