As phosphorescent (P) emitters allows for a conversion of up to 100% of injected charges into emitted photons, resulting in a theoretical internal quantum efficiency of unity, P materials are usually imperative to boost the efficiency of white organic light-emitting diodes (WOLEDs). Unfortunately, there is still no proper blue P material in terms of operational lifetime and color-stability until now, limiting the development of all-phosphor devices. To solve the above conflicts, the hybrid WOLEDs, combining blue flourescent (F) emitters with P green- red/orange emitters, are considered to be an effective way due to their merits, such as high efficiency, stable color and long lifetime. A key feature of designing HWOLEDs is utilizing an appropriate interlayer, which locates between the F emitter and the P emitter. Herein, by mixing 4,4-N,N-dicarbazolebiphenyl (CBP) with bis[2-(2-hydroxyphenyl)-pyridine] beryllium (Bepp2 ) as the interlayer, a simple hybrid with dual-emitting-layer a realized. The device with the bipolar interlayer shows higher performance than the device with CBP, Bepp2 interlayer and the device without interlayer. The reasons can be attributed to the bipolar interlayer which not only regulating the carriers in the device, but also eliminate the both the non-radiative Dexter energy Förster energy transfer between the two layers. The resulting device exhibits a total current efficiency of 23.6 cd/A and power efficiency of 16.2 lm/W at the illumination-relevant luminance of 1000 cd/m2 , respectively. Besides, a Commission Internationale de L’Eclairage (CIExy) variation of (0.31, 0.41) and a high color rendering index of 85 at 1000 cd/m2 can be obtained. Moreover, the lifetime of the device is also discussed.