▎ 摘　　要

Due to the special structure and electrical properties of graphene, the ultraviolet (UV) photodetectors based on ZnO nanorods (NRs) were optimized by electrostatic self-assembly with reduced graphene oxide (rGO). UV photodetectors based on ZnO NRs or ZnO-rGO nanocomposites (NCs) with high responsibility, sensitivity and good stability were fabricated by spin-coating method simply, which may be used for reference in manufacture of some big size device. Moreover, our work proves that the composite materials of ZnO and graphene have good prospects in the field of UV photodetector.