fig7

Figure 7. Variation of perovskite film properties with inorganic additives. (A) Illustration of phase transformation in FAPbI₃ upon CsI addition; (B) SEM image of pristine FAPbI₃ film; (C) SEM image after CsI incorporation^[110]. Copyright 2025 Springer; (D) Cross-sectional HAADF-STEM image of alternating six-layer deposition of NaF and CsPbBr₃ by vacuum evaporation (E) XRD patterns of CsPbBr₃ depending on the presence of NaF interlayers^[118]. Copyright 2025 American Chemical Society; (F) schematic illustration of sequential deposition of RbBr/PbBr₂ followed by CsBr/PbBr₂ and the corresponding film formation; (G) PL spectra as a function of RbBr/CsBr ratio, and (H) optical images under UV illumination^[119]. Copyright 2025 Elsevier. FAPbI₃: Formamidinium lead iodide; FA: formamidinium; SEM: scanning electron microscopy; HAADF-STEM: high-angle annular dark-field scanning transmission electron microscopy; XRD: X-ray diffraction; PL: photoluminescence; UV: ultraviolet.