Hybird perovskite materials have been regarded as an outstanding candidate in the optoelectronic devices. In this work, a high speed perovskite photodetector (PD) based on the gas-solid reaction process was proposed and a high responsivity and detectivity of 5.87 A W À1 , $ 10 12 Jones were obtained after annealing at 120 C for 30 min. Compared to traditional solution process, the gas-solid reaction provided a full coverage¯lm with high crystallization, which is bene¯cial to the electrons transportation and the capture of the incident light. The response time of device is up to 248 s/207 s under 700 Hz. More importantly, the device exhibits a good stability after storing in the air for two months. The perovskite PD shows a high performance upon the light illumination, revealing that the hybrid perovskite is a promising candidate for optoelectronic applications.