Fig. 6: OLED performance of the D-A types emitters with short excited state lifetimes.

a Device architecture and HOMO and LUMO energy levels of the materials in OLED devices. b Current-density-voltage-luminance (J-V-L) and c EQE-luminance (EQE-L) cures of the TADF OLEDs (insert: EL spectra of the devices driven at the current density of 1 mA cm−2). d Commission Internationale de L’Eclairage (CIE) chromaticity diagram of the EL. e EQE-L cures of the MR-TADF-based OLEDs with TADF materials as assistant host (insert: EL spectra of the devices driven at the current density of 1 mA cm−2). f Transient EL decay characters of the TADF OLEDs (measured with pulse voltage of 6 V and duration of 500 ns). Source data are provided as a Source Data file.