摘要： Solar-blind ultraviolet (UV) photodetectors are greatly desired in number of areas in terms of the military and civilian purposes, especially self-powered devices driven by the photovoltaic effect. Herein, a solar blind photodetector has been successfully achieved on a Spiro-MeOTAD/β-Ga2O3 organic-inorganic hybrid construction. The fabricated photodetector can operate with self-powered mode and show an obvious photodetection with a narrow spectrum region, exhibiting a high responsivity (65 mA/W) and a large external quantum efficiency (32％) under low power intensity (~1 μW/cm2) UV illumination, at zero bias. Fortunately, the device shows a fast temporal pulse response (τrise~2.98 μs and τdecay~28.49 μs), which is superior to the previously reported Ga2O3 based self-powered photodetectors. More importantly, the photodetector can operate stably and shows good repeatability. These excellent performances of device could be attributed to the pre-existing band alignment of the Ga2O3 and Spiro-MeOTAD, and are comparable to and/or even higher than those of other self-powered solar-blind UV photodetectors, which indicate that the design of device configuration based on a Ga2O3/Spiro-MeOTAD heterojunction is certified as an excellent candidate for high sensitivity, ultrafast response and self-powered photo-detecting device for solar-blind UV signal.