We report a branched hierarchical nanostructure of TiO2 nanoneedles on SnO2 nanofiber network (B-SnO2 NF) that serves as model architecture for highly efficient dye-sensitized solar cells (DSSCs). The nanostructure simultaneously offers a low degree of charge recombination, a fast electron transport and a large specific surface area. The power conversion efficiency for B-SnO2 NF52 (with SnO2 NF diameter ∼52 nm) is up to 7.06%, increased by 26% and 40% compared to B-SnO2 NF113 (5.57%, with SnO2 N
