The recent dramatic rise in power conversion efficiencies(PCEs)of perovskite solar cells(PSCs)has triggered intense research worldwide.However,high PCE values have often been reached with poor stability at an illuminated area of typically less than 0.1 square centimeter.Here,we put our focus on two aspects: one is improving the reproducibility of device performance through controlling the morphology and uniformity of photoactive and charge transport layers in the solar cells;