Hole transporting material 5, 10, 15-tribenzyl-5H-diindolo[3, 2-a:3′, 2′-c]-carbazole for efficient optoelectronic applications as an active layer |
EL EQE as a function of current density. Insets: EL spectra, as well as current efficiency as a function of luminance of TBDI and α -NPD based OLEDs. |