Composition Regulation And Performance Of Organometal Halide Perovskite Solar Cells

The organometallic halide perovskite solar cells have great potential application on energy generation,due to its mild preparation process,high photoelectric conversion efficiency and low cost.However,it reduces the toxicity of lead in perovskite and expands the wearable flexible function,which are the development direction of industrial application.In this thesis,the preparation method of a new tin-lead alloy perovskite solar cell and the assembly process of a flexible perovskite solar cell based on mica substrate are studied,and the regulation of the perovskite composition and the mica thermal performance on the photoelectric conversion efficiency of the cell are studied in depth influences.The main research content includes the following two aspects:(1)The inorganic metal tin directly replaces the organic lead halide,and at 70 ?,the substitution reaction between Sn and methylamine lead iodine(CH3NH3PbI3 or MAPbI3)solution forms a tin-lead mixed perovskite film,and the reaction time is 1 day when the Sn content is 15%,and its photoelectric conversion efficiency reaches 12.46%.A low toxicity perovskite solar cell has been successfully prepared.This replacement strategy can take advantage of new directions to further explore different active metals and replace the less active organometallic systems with lower temperature conditions,which can reduce environmental pollution and save costs.(2)The perovskite solar cell with p-i-n structure was prepared by using the layered structure of conductive mica as the substrate,and the maximum photoelectric conversion efficiency was 18%.In a humidified environment of double 85(85 ?,85% RH),the mica-based and encapsulated perovskite film maintains 90% stability within 24 h,and the PET-based perovskite degrades by 90% during the same period;The battery efficiency can be maintained above 80% within 6 h.After 24 h,the efficiency can still maintain 60% of the original efficiency.After 6 h of PET-based perovskite solar cells,almost all efficiency is lost.Good environmental stability is calcium and titanium.The commercialization of mineral solar cells provides further development.