we designed and fabricated a white organic light-emitting device based on{[2-methyl-6-[2-(2,3,6,7-tetrahydro-1H,5H-benzo[ij]quinolizin-9yl)ethenyl]-4H-pyran-4-ylidene] propane-dinitrile)ultrathin layer and 4,4'-bis(2,2 ' diphenylvinyl)-1,1 ' -biphenyl. It shows a maximum power efficiency of 1.81 m/W at 4 V (the brightness is 51 cd/m(2)). Its brightness reaches 8496 cd/m(2) at 16 V. And the chromaticity coordinates varying from (0.42,0.34) to (0.32,0.28) with the forward bias from 4 to 16 V are well within the white region.