FIGURE 7 Schematic illustrations of Cu-Ag thin-film cocatalyst with (A) small Cu grains and (B) large Cu grains. FEtotal from (C) p-Si / Cu-Ag, (D) p-Si / SiO2-Cu-Ag. Reproduced with permission.[99] Copyright 2021, American Chemical Society. (E) Schematic fabrication processes of CZTS/CdS by different heat treatment conditions (Air or N2atmospheres). (F) CO2 reduction products yield rate of CZTS, CZTS/CdS and CZTS/CdS (HA). Reproduced with permission.[103] Copyright 2021, John Wiley and Sons.