High performance CH₃NH₃PbI₃-based photodetector fabricated in ambient condition by doctor-blading deposition

Abstract High-quality CH3NH3PM3 perovskite thin films in air via doctor-blading technology of in-situ heat treatment were prepared, the resulting perovskite film has the advantages of large crystal domains, good stability and repeatability. Based on the perovskite film, the perovskite photodetectors with such a simple structure of glass/ CH3NH3PbI3/Au were constructed, and the high resulting responsivity (R) of 5.70 AW−1 was achieved, the as fast as rise and fall response speed of 14.0ms and 13.4ms were showed, which indicates that the perovskite films via doctor- blading have a potential application prospect in constructing low-cost and large-area optoelectronic devices.