Ligand‐Modulated Excess PbI2 Nanosheets for Highly Efficient and Stable Perovskite Solar Cells

Abstract Excess lead iodide (PbI2), as a defect passivation material in perovskite films, contributes to the longer carrier lifetime and reduced halide vacancies for high‐efficiency perovskite solar cells. However, the random distribution of excess PbI2 also leads to accelerated degradation of the p... View More