Stability Enhancement for All Inorganic CsPbX₃ Perovskite Solar Cells via Metal Ions Doping

Perovskite solar cells (PSCs) are expected to be the new generation of photovoltaic technologies, owning to their high photoelectric conversion efficiency and low cost. However, the lower stability of perovskite materials restricts their commercial application. Therefore, it is vital to improve the stability of perovskite materials to further promote the practicality of perovskite solar cells. The progress of metal ion doping strategy in tuning the structure, composition, and stability of all-inorganic perovskite solar cells was reviewed, with emphasis on the metal ions doping at the A- and B-site of CsPbX₃ perovskites. Finally, the opportunities and challenges of metal ion doping to develop highly efficient and stable all-inorganic perovskites solar cells were put forward.