| abstract |
The invention discloses a method for improving the growth quality of perovskite crystals and a solar cell device. The method is as follows: covering the crystallized perovskite polycrystalline film with an alcohol solution of inorganic salts to increase the grain size , and the photoelectric performance of the polycrystalline film is improved. The solar battery device of the invention comprises a substrate, a transparent anode, a hole transport layer, a perovskite polycrystalline thin film layer, an electron transport layer, a hole blocking layer and a cathode stacked in sequence. The method of the invention can grow the perovskite crystal size to 4-5 times of the prior art, has simple process, rapid crystallization, high stability and repetition rate, low dependence on environment and low cost. |