Fig. 6: OLED device performance.

a The device structure and energy level diagram of mCP:TSPO1 hosted blue OLEDs. b Normalized electroluminescence spectra. c Current density–voltage–luminance curves. d External quantum efficiency–current density curves of 2,5-tDPAtDIDCz (blue) and 1,6-tDPAtDIDCz (black) devices.