Method for rapid preparation of large-area perovskite crystals

The invention belongs to the semiconductor optoelectronic material and device preparation technology field, and discloses a method for rapid preparation of large-area perovskite crystals. The method comprises the following steps: certain amounts of lead halide and methyl ammonium halide are weighed, mixing is carried out, then 1,4-butyrolactone, dissolving is carried out, and a perovskite solution is prepared; then the prepared perovskite solution is added to an organic solvent with a certain amount, and perovskite crystals are precipitated. Perovskite crystals are precipitated rapidly through a solution extraction mode, the method is simple and practical, the repeatability is high, external requirements are not high, different organic solvents can be selected for growth according to practical demands to obtain monocrystalline particles with different sizes, the maximum monocrystalline particle size can reach dozens of micron and thus the monocrystalline particles have great advantages at the aspect of manufacturing of photoelectric devices.