High-Quality Perovskite Film Preparations for Efficient Perovskite Solar Cells

Solar cells employing organolead halide perovskite films have caught tremendous attention, and their power conversion efficiencies were stunning from 3.9% to over 22% in only 6 years. Various research reports have shown that effective controls on perovskite crystallinity, homogeneity, and surface morphology are crucial to improving the power conversion efficiencies (PCE) of perovskite solar cells. Here, based on the typical one-step and two-step deposition methods, we would like to introduce the solvent treatment mechanisms of mixed-solvent-vapor annealing and polar solvent additive, investigate the growth mode and control means of perovskite films by physical characterizations, and discuss their effects on the photovoltaic performance improvements for perovskite solar cells