Effects of drying time on the formation of merged and soft MAPbI3 grains and their photovoltaic responses

The grain sizes of MAPbI 3 films and the atomic contact strength at the MAPbI 3 /P3CT-Na interface are manipulated by varying the drying time of saturated MAPbI 3 precursor solutions, which influences the performance of the resultant perovskite photovoltaic cells.