Fig. 2From: The Study of Metal Sulfide as Efficient Counter Electrodes on the Performances of CdS/CdSe/ZnS-co-sensitized Hierarchical TiO2 Sphere Quantum Dot Solar CellsSEM (a) and TEM (b) images of hierarchical TiO2 spheres (HTSs). c XRD pattern of HTS and d, e SEM and TEM images of CdS/CdSe/ZnS QDs sensitized on HTS and EDS analysis of the deposited ion species of the QDs on HTS substrates (f)Back to article page