The white organic light-emitting diodes with dual-emitting layer structure were prepared, using bipolar material 4,4'-bis(carbazol-9-yl)biphenyl (CBP) as host, blue fluorescent materials N-(4-((E)-2-(6-((E)-4-(diphenylamino)styryl)naphthalen-2-yl)vinyl)phenyl)-N-phenylbenzenamine (N-BDAVBi) and orange phosphorescent materials Iridium(III) bis(4-phenylthieno［3,2-c］pyridinato-N,C2')acetylacetonate (PO-01) as dopant. The device structure was optimized by adjusting the position of the emitting layer and inserting a spacer between the two emitting layers, then the photoelectric properties of the device were studied. The OLEDs were characterized by combining fluorescent and phosphorescent materials as the emitting layers, and using the same material CBP as both the host and spacer. The addition of the spacer improved the performance of the OLEDs. The maximum current and luminous efficacy of the OLEDs were 19.6 cd/A and 12.3 lm/W, respectively. The color coordinates varied from (0.438, 0.476) to (0.316, 0.389) when the brightness increased from 15 to 10 310 cd/m2, always in white zone.