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Phase diagrams for the (left) cubic-tetragonal and (middle) tetragonal-orthorhombic phase transitions of the MA1–x–yGAxFAyPbI3 system. (Right) Composition map for of the real part of the complex dielectric permittivity ε′ obtained at room temperature and 1 MHz probing frequency. Reprinted with permission from ref (357). Copyright 2023 Wiley-VCH.
