Fig. 1: Conversion reaction leading to the formation of MAPbI3 within TiO2 mesopores.
From: Kinetics and energetics of metal halide perovskite conversion reactions at the nanoscale
a–c Scanning transmission electron microscope-energy dispersive spectroscopy (STEM-EDS) analysis for MAPbI3 after conversion: a Ti map (showing cross-section of mesoporous TiO2 film). b Ti, Pb, and I map and c C map displaying infiltration of MAPbI3 within the mesoporous TiO2 film. d Absolute Bragg peak intensity against the time of the MAPbI3 conversion reaction: integrated intensity vs time of the consumption of PbI2 (red trace) and formation of MAPbI3 (blue trace). The intensities of the most intense Bragg reflections were integrated, normalized and plotted against time. Reciprocal maps of the PbI2 + MAI perovskite conversion reaction at e 0 s f 50 s and g 1000 s after the MAI- isopropyl alcohol solvent was introduced.
