Organometal Halide Perovskite CH₃NH₃PbI₃ as an Effective Photosensitizer for p-Type Solar Cells

摘要

CH3NH3PbI3 sensitizers are prepared with different mixed solvents. Using butyrrolactone/dimethylsulphoxide mixed solvent, a smooth film with roughness of 12 nm is obtained. The preparedCH3NH3PbI3 are used as photosensitizers of p-DSSC. Photoelectrical performance indicates that-2 CH3NH3PbI3 with butyrrolactone/dimethyl sulphoxide presents a higher Jsc of 7.5 mA cm and ahigher efficiency of 0.53%, which may contribute to its improved UV-vis absorption and smooth film.Researches further indicate that CH3NH3PbI3 with butyrrolactone/dimethyl sulphoxide provides fasthole transport, less recombination and improved hole collection efficiency.