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

Abstract All-inorganic perovskite CsPbBr 3 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 CsPbBr 3 films could keep high stability under ambient environment. Furthermore, the excellent photoresponse of CsPbBr 3 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.