Dibenzothiophene-indolocarbazole-based bipolar material: Host for green phosphorescent OLEDs and non-doped fluorescent emitter

A universal bipolar host based on isonicotinonitrile and carbazole for efficient red, green and blue PhOLEDs

“…In addition, the efficiency roll-off of device G1 is relatively small as the EQE remains to be 20.00 and 19.24% at the brightness of 100 and 1000 cd m À2 with only 0.2% and 4.0% decrease. The EL performance is significantly better than those reported for CBP-based green devices, 33,[35][36][37] indicating that BCz3PhCN could be an excellent host for green PhOLEDs.…”

A review of fused-ring carbazole derivatives as emitter and/or host materials in organic light emitting diode (OLED) applications

“…5) in PhOLEDs with the archetypal green emitter Ir(ppy) 3 . 73 Bipolar indenocarbazoles have also been studied. DPDDC (Fig.…”

“…5) in PhOLEDs with the archetypal green emitter Ir(ppy) 3 . 73 DBTO-IN/CAR has T g 156 °C and E T 2.71 eV (in toluene). PhOLEDs with a DBTO-IN/CAR :Ir(ppy) 3 (5 wt%) EML exhibited maximum PE max /CE max /EQE max of 45.36 lm W −1 , 51.98 cd A −1 and 19.03%, which were only slightly higher than the reference device with CBP host (42.01 lm W −1 , 50.81 cd A −1 , 17.72%).…”