Electrochemical and structural analysis of Al-doped ZnO nanorod arrays in dye-sensitized solar cells

► Al-doped ZnO nanorod arrays for photoanode for dye-sensitized solar cells. ► The open-circuit voltage increased significantly with the addition of Al, up from 0.636 V to 0.732 V ► Diameter of nanorods changed with the addition of Al. ► Appropriate increase in nanorod diameter is considered favorable for performance.