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(a) Activation energy of MA cation motion vs guest cation concentration for different MA-based mixed systems determined using the dielectric (solid) and NMR (open points) spectroscopies. Solid curves are a guide for the eye. Data taken from refs (164−166, 204). (b) Rotational correlation times at room temperature of FA, MA, and GA molecular cations in different mixed perovskites obtained by NMR. Reprinted with permission from ref (204). Copyright 2023 American Chemical Society.
