Additional file 1: of Efficiency Enhancement of Perovskite Solar Cells by Pumping Away the Solvent of Precursor Film Before Annealing

J-V curves of both the reference and modified devices measured in dark condition. J-V curves and photovoltaic parameters of a modified MAPbI3 − x Cl x -based device scanned in both forward and reverse directions. Device stability of both reference and modified devices measured in air (humidity: ~40 %, temperature: ~20 °C).