<正>In this work,a photodetector based on ZnO nanorods array was vertically grown on the nanoZnO film.ZnO nanorods playing two roles in the photodetector,as the materials of absorbing UV light and carrier transport path.We used the solgel method to prepare the ZnO seed solution and annealed to get nano-ZnO film.Then,ZnO nanorods array were fabricated by hydrothermal