Figure 1

3D surface topography (index 1) and corresponding height histogram (index 2) of FTO/ZnS thin films annealed at (a) 300, (b) 400, (c) 500, and (d) \(550\,^\circ{\text{C}}\).

3D surface topography (index 1) and corresponding height histogram (index 2) of FTO/ZnS thin films annealed at (a) 300, (b) 400, (c) 500, and (d) \(550\,^\circ{\text{C}}\).