Fig. 2From: Efficient Nickel Sulfide and Graphene Counter Electrodes Decorated with Silver Nanoparticles and Application in Dye-Sensitized Solar CellsThe SEM images of NiS CE (a), NiS/Gr-Ag CEs (b, c, d, e), and EDS of NiS/Gr-Ag CE (f)Back to article page