A review of recent progress on enhancing the stability of CsPbX3 perovskite solar cells

Over the past few years, photovoltaic technology has become increasingly crucial for modernizing the energy industry. As the most promising device, perovskite solar cells have developed rapidly in a shocking way. We witnessed the power conversion efficiency (PCE) increase from 3.8% to 26.1%, which is very close to the boundary of the Shockley–Queisser theory. Due to their excellent photoelectric properties and solution processability, hybrid organic–inorganic materials show the potential to be next-generation solar cells. However, hybrid organic–inorganic perovskite materials are still subject to certain conditions, such as moisture in the surroundings, thermal conditions, toxicity of the organic components, etc. In consideration of modifying these defects, all-inorganic perovskite materials are designed to enhance the stability of devices and reduce pollution in the natural environment. Among all of these materials, CsPbX₃ has been considered as the most potential and workable material. In this review, we will introduce the development of CsPbX₃ and its latest research status, hoping that this perspective provides guidance and insight toward the improvement of material design and application in actual production as quickly as possible.