Facile synthesis of SnO2 coated urchin-like TiO2 hollow microspheres as efficient scattering layer for dye-sensitized solar cells

SnO2 coated urchin-like TiO2 hollow microspheres are firstly fabricated and used as scattering layer. An efficiency of 8.33% is achieved and shows a 28.4% enhancement compared to that of bare nanocrystalline TiO2.