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 the photoelectric performance of photoelectric detector is an important role 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.<BR>Carrier diffusion length, intrinsic defects and heat injection method<BR>
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