© 2016, Xu et al. A new approach to improve the quality of MAPbI 3 − x Cl x perovskite film was demonstrated. It involves annealing the precursor film after pumping away the solvent, which can decrease the influence of solvent evaporation rate for the growth of the MAPbI 3 − x Cl x perovskite film. The resulting film showed improved morphology, stronger absorption, fewer crystal defects, and smaller charge transfer resistance. The corresponding device demonstrated enhanced performance when compared with a reference device. The averaged value of power conversion efficiency increased from 10.61 to 12.56 %, and a champion efficiency of 14.0 % was achieved. This work paves a new way to improve the efficiency of perovskite solar cells.
Xu, Q. Y., Yuan, D. X., Mu, H. R., Igbari, F., Bao, Q., & Liao, L. S. (2016). Efficiency Enhancement of Perovskite Solar Cells by Pumping Away the Solvent of Precursor Film Before Annealing. Nanoscale Research Letters, 11(1). https://doi.org/10.1186/s11671-016-1467-9