The seven kinds of natural dyes were extracted from flowers,leaves,fruits and peels,and were measured their optical absorption characteristics by U-2001 spectrophotometer.By comparison,it was found that the natural dye extracted from leaves of Chinese rose showed better performance of the light response.Nano-crystalline Zn2TiO4 film electrode were prepared by sol-gel method and were characterized by XRD and SEM.Using the natural dye extracted from leaves of Chinese rose as sensitizers,the natural dye sensit...