Hybrid Perovskite Photoconductivity Visible Region Detector with High Speed and Stability

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[Formula: see text]A W[Formula: see text], [Formula: see text] Jones were obtained after annealing at 120[Formula: see text]C for 30[Formula: see text]min. Compared to traditional solution process, the gas–solid reaction provided a full coverage film with high crystallization, which is beneficial to the electrons transportation and the capture of the incident light. The response time of device is up to 248[Formula: see text][Formula: see text]s/207[Formula: see text][Formula: see text]s under 700[Formula: see text]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.