In recent years, with the increase

In recent years, with the increase of energy demand and the development of intelligent technology, solar cells and photoelectric detector plays an important role in these areas, and improve the photoelectric conversion of solar cell and improve the photoelectric performance of photoelectric detector is an important task of the researchers, at this time in numerous photovoltaic material, perovskite in its ultra high carrier mobility, high optical absorbance, super sensitive photoelectric response and wide carrier diffusion length under the attention of many researchers and sought after. Perovskites are a variety of types, and their performance characteristics vary greatly due to different structures. And the preparation of perovskite method is also a variety of methods, the common methods are spin coating method, vapor deposition method, heat injection method, high temperature solvent method, using these methods to get the perovskite film is not only stable, can also exist in room temperature, and its photoelectric characteristics after detection is also very excellent.In some ways we can do by control conditions, to obtain the required ratio of perovskite, such as CH3NH3PbI3 which was prepared by vapor deposition process, first PbCl2 in basement of sedimentary, and then into the isopropyl alcohol solution with the CH3NH3I reaction, in this time we can control solution concentration, reaction time and other indirect control the thickness of the perovskite, so as to achieve the controllable, the purpose of the perovskite structure controllability.Although perovskite materials compared with other photovoltaic material, has the advantage of advanced in many ways, but it is not without shortcomings, first of all, the intrinsic defects is one of the almost perovskite membrane defects, such as indirect, vacancy, and impurity on the surface of the crystal defects and grain boundaries, etc., these defects will lead to the emergence of trap condition, so as to make the light carrier appeared the radiative recombination, thus makes the crystal quality is affected, which affects the further improve the efficiency of solar cells, followed by stability, miscellaneous combination of perovskite stability are highly susceptible to the influence of external environment such as temperature, air, These effects can be eliminated by packaging the perovskite, and the photothermal stability depends entirely on the material itself, but the researchers found passivating defects that could improve the photothermal stability. Finally, the doping of heavy metals in perovskite, heavy metals have an impact on both biology and the environment. If it gets into rivers, soil or amber, it can have a serious impact on the environment and threaten people's health.In this paper, thermal injection method will be used to prepare CSPBBr3, and the photoelectric properties of CSPBBr3 in terms of light absorption and fluorescence will be tested. It is expected to obtain relevant knowledge, witness some related properties of Cesium, Lead and Bromine, make some new discoveries in CSPBBr3, and find ways to improve the current defects of perovskite.