Hysteresis in Carbon-Based Multiporous Layered Electrode Perovskite Solar Cells with 5-AVA-MAPbI3 and CsFAPbI3

Carbon-based multiporous layered electrode perovskite solar cells (MPLE-PSCs) have gained attention for their affordability and operational stability, making them promising candidates for commercialization. Various perovskite compositions have been studied as light absorbers in MPLE-PSCs. In this study, we compared the operational performance of MPLE-PSCs using 5-AVA-MAPbI₃ and CsFAPbI₃ under varying scan rates and capacitance conditions. The 5-AVA-MAPbI₃-based devices exhibited notable ion migration and charge accumulation, particularly at high scan rates, which may negatively affect the operational performance. In contrast, CsFAPbI₃-based devices showed stable J–V characteristics, reduced hysteresis, and consistent photocurrent generation under continuous illumination. However, while the long-term stability of 5-AVA-MAPbI₃ is well-established in the literature, long-term data for CsFAPbI₃ remain limited, emphasizing the need for further investigation. These findings highlight the importance of selecting appropriate perovskite materials and optimizing device architectures to enhance stability and accelerate the commercialization of MPLE-PSCs.