fig3

Figure 3. The preparation method of inorganic perovskite films. (A) One-step spin-coating method. Reprinted from Ref.^[19] under the CC BY 4.0 license; (B) Two-step spin-coating method. This figure is quoted with permission from Ref.^[87], Copyright © 2022 Wiley-VCH; (C) Schematic illustration of vacuum dual-source thermal co-evaporation to deposit CsPbBr₃ films. This figure is quoted with permission from Ref.^[74], Copyright © 2018 Elsevier; (D) Sequential evaporation technique to prepare CsPbBr₃ perovskites. This figure is quoted with permission from Ref.^[95]; Copyright © 2019 Elsevier.