Unlike simply providing a direct electron transport channel using one-dimensional (1D) nanowires/nanotubes in DSCs which would dramatically decrease the dye absorption and then lead to an uncompetitive efficiency [5] or utilizing semiconductor with higher electron mobility like ZnO which is unstable in acid or SnO2 having weak bonding with dye molecules [6], F-T film can shrink the transport distance of electron via FTO’s conductivity, maintain
a relative high dye loading level by TiO2 shell, and keep the stable nature of traditional photoanodes.