fig4
Figure 4. (A) Sn content (expressed as atomic percentage, At%) in relation to the number of SnOx cycles. (B) A diagram of different deposition modes. (C) XPS spectra. (D) FTIR spectra. (E-H) AFM images. (I) Diagram of two deposition modes on PCBM and AZO substrates. Reprinted with permission from ref.[22]. Copyright 2023 Wiley.
