▎ 摘　　要

Graphene-zinc oxide (G-ZnO) nanocomposites were prepared through a hydrothermal approach and used as electron acceptors in poly-(3-hexylthiophene) (P3HT)-based bulk-heterojunction organic solar cells (OSCs). The blended film, which was a mixture of different weight ratios of P3HT and G-ZnO, was applied as the active layer in the OSC device. The power conversion efficiency (PCE) increases first and then decreases with the increase in G-ZnO content in the blended films. The device containing 15 wt% (ratio to P3HT) of G-ZnO shows the best performance with a PCE of 0.98%, an open-circuit voltage of 0.81 V and a short-circuit current density of 4.92 mA cm(-2). The impact of the intrinsic mechanism on the characteristics of the OSCs under the illumination condition is discussed.