All-Inorganic Perovskite Solar Cells: Status and Future

In recent years, organic-inorganic hybrid perovskite materials based on the ABX(3) structure have attracted worldwide attention due to their excellent optoelectronic properties and cheap manufacturing costs. However, the organic components in the system are elementary to be resolved under the influence of light, heat, humidity , and other external conditions , which greatly limits the industrialization of the PSCs (Perovskite solar cells) . All-inorganic perovskite materials prepared by using pure inorganic cations to replace the A-site organic cations in ABX(3) structure have been developed rapidly due to their excellent thermal stability and environmental stability. At present, the efficiency of all-inorganic perovskite solar cells(I-PSCs) has exceeded 19% with broad application prospects. The research progress of inorganic perovskite materials and the different types of inorganic perovskite materials are reviewed. Meanwhile, the ways to improve the stability of devices from the aspects of films forming process , doping engineering , post-processing engineering , etc. are summarized Finally , we introduced the large-area preparation and flexible application of I-PSCs , reveals the challenges faced by I-PSCs and summarizes the prospect of the field.