Three Effective Methods for Passivation of Perovskite Solar Cell Defects

Abstract

Perovskite solar cells have garnered significant attention due to their outstanding photoelectric properties. However, the majority of widely used perovskite polycrystalline ion crystal films are prepared through solution treatment processes, which often lead to the formation of high-density defects during the crystallization process. These defects within the device can be quite severe and are a major contributor to non-radiative recombination, limiting the enhancement of photovoltaic performance and stability of solar cell devices. In this paper, we review the latest advancements in defect passivation strategies for perovskite crystals, encompassing Lewis acid, Lewis base, and Lewis acid-base synergy approaches. We delve into the regulatory mechanisms and passivation effects of these various strategies on perovskite surface/interface defects. Furthermore, we anticipate the application of these defect passivation techniques in future studies, hoping to further enhance the performance and stability of perovskite solar cells.