Blue electrophosphorescent organic light-emitting devices (PHOLEDs) were fabricated by doping a phosphorescent iridium complex, bis[(4,6-difluorophenyl)pyridinato-N,C-2](picolinato)iridium(III) (Firpic) into a novel nonconjugated polymer, poly [(9,9-diethylfluoren-2,7-ylene)diphenylsilylene] (PF-Si). A device with the same configuration using the widely applied poly(9-vinylcarbazole) (PVK) as the host material was also prepared under the identical conditions for comparison. The luminance and current efficiency of the PF-Si:Firpic device were over four times higher than those of the PVK-Firpic device at a current density of 200 mA/cm(2) (1260 cd/m(2) vs 275 cd/m(2), 0.61 cd/A vs 0.13 cd/A).