Energy band alignment at the heterointerface between a nanostructured TiO2 layer and Au22(SG)18 clusters: relevance to metal-cluster-sensitized solar cells

XPS study of the electronic structure of the Au22(SG)18 clusters and their interface with TiO2 reveals that tailoring of the electronic band structure at the interface can be exploited to increase the efficiency of metal-cluster-sensitized solar cells.