Abstract
We successfully fabricated a highly efficient red organic electrophosphorescent device by using solution-processable 4,4'-Bis(carbazol-9- yl)-bicycle -octancebiphenyl as host. A high power-efficiency of 18.6 Im/W at 100 cd/m 2 with Commission Internationale de l'Eclairage coordinates of (0.55, 0.45) was obtained by doping in the device with 3 wt% red emitter, tris(2-phenylquinoline)iridium(III).