| abstract |
The invention relates to a high-performance perovskite thin film, a preparation method thereof and a solar cell. The chemical formula of the perovskite polycrystalline thin film is ABX 3 , and the preparation method includes the following steps: (1) preparation of a perovskite precursor solution, Dissolving the halide of B and the monovalent cation salt of X in a solvent with oxygen-containing groups to form a perovskite precursor solution; (2) coating the perovskite precursor solution obtained in step (1) on the substrate Forming a perovskite precursor film, adding a second solvent dropwise on the surface of the film during film formation, wherein the second solvent contains an anti-solvent that is insoluble in the perovskite precursor solution; (3) the step (2) The perovskite precursor film is crystallized to obtain a high-performance perovskite polycrystalline film. |