Improve The Performance Of Inorganic Perovskite Solar Cells By Improving Grain Growth

Perovskite have received extensive attention due to their unique crystal structure,high extinction coefficient,high carrier mobility,and long carrier migration distance.However,organic-inorganic hybrid perovskites are sensitive to light and heat,and are easily decomposed in the presence of light and heat.In view of the photosensitivity and heat sensitivity of organic-inorganic hybrid perovskite batteries,inorganic perovskites with excellent stability in light and heat have been favored.However,the efficiency of inorganic perovskite solar cells is low.In this paper,the quality of the film is improved by doping the inorganic perovskite,and the thickness of the perovskite layer is increased by appropriate temperature treatment of the inorganic perovskite solution to improve the efficiency of the inorganic perovskite solar cell and the stability The following work:The first part is that the manganese ions insert into the inorganic perovskite.Studies have shown that the incorporation of manganese ions significantly increases the crystallites and reduces the defects of the film.The efficiency of CsPbBrI2 inorganic perovskite solar cells based on 2%MnCl2 doping is 13.47%,and the average grain size is up to 1200 nm,which significantly reduces the defects of inorganic perovskite films,and the stability of device has been greatly improved The device maintains an efficiency of over 90%for 30 days under low humidity conditions and exhibits excellent stability.The second part increases the thickness of the inorganic perovskite film by heating the inorganic perovskite solution at a suitable temperature without adversely affecting the film quality.After heating the inorganic perovskite solution at 100 degrees for 5 minutes,the film thickness was thickened from 165 nm to 195 nm,and the current density was greatly improved.The efficiency of the CsPbBrI2 inorganic perovskite solar cell was 14.81%,The device maintains an efficiency of over 90%for 30 days under low humidity conditions and exhibits excellent stability.In the third part,by incorporating hydriodic acid into the inorganic perovskite,the crystallization rate of the perovskite is retarded.The crystallites are increased,and the excess iodide is mixed to distort the crystal lattice.While improving the efficiency of inorganic perovskite solar cells,the stability has also been greatly improved.