Impact of the Solvation State of Lead Iodide on Its Two‐Step Conversion to MAPbI3: An In Situ Investigation

D.B. and P.C. contributed equally to this work. This work was supported by the King Abdullah University of Science and Technology (KAUST), National Natural Science Foundation of China (61604092), and National University Research Fund (GK201802005). CHESS is supported by the NSF via NSF award DMR-1332208. A.A. conceived the project. A.A., K.Z., and T.D.A. supervised the work. D.B. and P.C. performed all of the experiments. M.T., K.W., H.D., and D.-M.S. helped to acquire the GIWAXS measurements. S.(F.)L. helped with useful discussions of device fabrication. All the authors contribute to the writing of the Manuscript.