Synthesis and Optical Properties of Bismuth-based Perovskite Materials

Bismuth-based perovskite has become the best candidate material for non-lead perovskite because of its low toxicity and good moisture stability. The structural diversity of bismuth halide perovskites gives them many photoelectric properties, such as nonlinear optical properties, photochromic effects and photoelectric effects. However, bismuth halide perovskite materials with different stoichiometric ratios have different light absorption properties and carrier transport processes. In order to search for high stability and excellent optical properties of bismuth halide perovskite materials, this paper synthesized Rb3BiBr6 materials by using rubidium bromide and bismuth bromide as precursors, and further studied the morphology and optical properties of the materials by scanning electron microscopy, UV-VIS absorption spectroscopy, ultraviolet photoelectron spectroscopy and nanosecond transient absorption spectroscopy. The results show that the material has a wide light absorption range and a long carrier transfer process, indicating that the bismuth-based perovskite material has great application value in the field of photocatalysis and photodetector.