Interfacial Effects during Rapid Lamination within MAPbI3 Thin Films and Solar Cells

Although hybrid halide perovskite solar cells (PSCs) have recently reached record efficiency among thin film photovoltaic technologies, stability of these devices remains a pressing problem for commercialization. Lamination processes represent an attractive means of fabricating PSCs due to their self-encapsulating nature and compatibility with high-throughput manufacturing methods. These techniques often involve high temperature and pressure, which represents an underexplored region of perovskite processing parameter space. In this work, we investigate the behavior of the archetypal halide perovskite, methylammonium lead iodide (MAPbI3), under elevated temperatures and pressures. We also characterize the interactions of MAPbI3 with the commonly used electron and hole transport layers (ETL and HTL) SnO2 and NiOx, and find that, while both show signs of reactivity, the latter is particularly susceptible to detrimental interaction at temperatures not far above those commonly used in ordinary perovskite film ...