Hierarchical Structures from Inorganic Nanocrystal Self-Assembly for Photoenergy Utilization

Figure 6

((a), (b), (c)) TEM images of SnO₂ hollow nanospheres; (d) a schematic image of the hollow sphere; (e) photocurrent-photovoltage characteristics of DSSCs assembled from as-prepared SnO₂ hollow nanospheres, commercial P25, and commercial SnO₂ with TiCl₄ treatment, as well as SnO₂ hollow nanospheres without TiCl₄ treatment [110].