Fig. 4From: Hydrothermal Etching Treatment to Rutile TiO2 Nanorod Arrays for Improving the Efficiency of CdS-Sensitized TiO2 Solar CellsThe XRD patterns of TiO2 NRAs, TiO2 NRAs etching for 5 h, and TiO2 NRAs sensitized by CdS QDsBack to article page