Two-step method for preparing all-inorganic CsPbBr3 perovskite film and its photoelectric detection application

All-inorganic perovskite CsPbBr3 films composed of uniform nanocubes were prepared by two-step method and the corresponding photoelectric detection devices were further designed for studying the photoresponse property. The SEM, XRD, PL and Abs results showed the pure CsPbBr3 films could keep high stability under ambient environment. Furthermore, the excellent photoresponse of CsPbBr3 film based devices showed relatively strong photoresponse, comparable short rise-time (0.60 s) and decay-time (0.64 s), which is attributed to the effective electron-hole separation and fast electrical transportation. Moreover, the stable multiple-cycles ON-OFF switching behavior implies its excellent reproducibility.