Enhanced performance for dye-sensitized solar cells based on spherical TiO2 nanorod-aggregate light-scattering layer

► Spherical TiO2 nanorod aggregates were fabricated as a light-scattering layer in dye-sensitized solar cells (DSSCs). ► They possess a large surface area for dye adsorption. ► They can generate efficient light scattering. ► They favorize long exciton lifetime. ► They exhibit improved DSSC performance.