Perovskite interfaces, 2D or not 2D

Surface reconstruction of metal halide perovskites by bulky organic cations can impair operational stability of solar cells. In a recent issue of Science, Park, Wei, Xu, and co-workers demonstrate a new strategy of interfacial passivation that limits such reactions. By combining interfacial passivation properties and chemical inertness of anilinium (An)-based cations, this work shows high-efficiency solar cells that demonstrate high-temperature stability in light and humid conditions. Surface reconstruction of metal halide perovskites by bulky organic cations can impair operational stability of solar cells. In a recent issue of Science, Park, Wei, Xu, and co-workers demonstrate a new strategy of interfacial passivation that limits such reactions. By combining interfacial passivation properties and chemical inertness of anilinium (An)-based cations, this work shows high-efficiency solar cells that demonstrate high-temperature stability in light and humid conditions.