Research status of all-inorganic perovskite solar cells: A review

Currently, perovskite solar cells have achieved significant progress in photovoltaic conversion efficiency, mainly using organic/inorganic hybrid materials as the perovskite absorption layer. However, this type of material has defects in thermal stability. In contrast, all-inorganic perovskite materials can effectively solve this problem, and the prepared solar cells have higher stability and longer lifespan than hybrid perovskite solar cells. Therefore, the emergence of all-inorganic perovskite solar cells has attracted widespread attention, and achieved an efficiency of 21.15% in a short period of time. However, due to the short development time of all-inorganic perovskite solar cells but with many reported articles, many researchers cannot clearly understand its current development status. Therefore, this article provides a systematic discussion on the photovoltaic conversion efficiency, working principle and structure, characterization methods, preparation process, and simulation software of all-inorganic perovskite solar cells, in order to provide readers with a clearer understanding. Finally, this article summarizes the current achievements of all-inorganic perovskite solar cells, clarifies the challenges faced in this field, and looks forward to its future development prospects.