Stability Challenges for Perovskite Solar Cells

Abstract As energy issues have become prominent, intensive attention has been paid to clean and renewable energy, such as wind energy, tidal energy, geothermal energy and solar energy. Perovskite solar cells, as the third generation of solar cells, possess many advantages, including high power conversion efficiency, simple preparation method and low fabrication cost, etc. Although the power conversion efficiency of this type of photovoltaic device has increased rapidly to more than 23% in less than ten years, stability issues constrain further development. Here, we systematically discuss the degradation mechanism for perovskite materials and their corresponding solar cell devices with a focus on the n‐i‐p structure. Developed strategies for improving device stability are also summarized. We hope this review will provide helpful insights for next stage research on enhancing the state‐of‐the‐art perovskite device stability toward future commercialization.