A method for fabricating a dye-sensitized solar cell is provided. The dye-sensitized solar cell includes a photo electrode including (a) mixing a TiO2 powder, a Zn-containing compound and an alkaline aqueous solution to form a mixture and performing a thermal process on the mixture to form a Zn-doped TiO2 powder; (b) mixing a binder solution with the Zn-doped TiO2 powder to form a paste; (c) coating the paste on a first electrode, and the paste is sintered to form a Zn-doped TiO2 porous layer, wherein the Zn-doped TiO2 porous layer and the first electrode construct a photo electrode; (d) disposing a second electrode opposite to the photo electrode after a dye is absorbed by the Zn-doped TiO2 porous layer; and (e) disposing an electrolyte between the photo electrode and the second electrode.