Abstract: A dye-sensitized solar cell comprises a photoelectrode formed by using a stainless steel plate and a counter electrode formed by using a light-transmissive electroconductive material, wherein the photoelectrode comprises, as the substrate thereof, a stainless steel plate having a chemical composition containing Cr: at least 16% by mass and Mo: at least 0.3% by mass and having a roughened surface in which pit-like indentations are formed and which is controlled to have an arithmetic average roughness Ra of at least 0.2 ?m, and comprises, as formed on the roughened surface of the substrate, a sensitizing dye-carrying semiconductor layer, the counter electrode has a catalyst thin-film layer formed on the surface of the light-transmissive electroconductive material and has visible light tansmissiveness, and the semiconductor layer of the photoelectrode and the catalyst thin-film layer of the counter electrode face each other via an electrolytic solution.

Abstract: [Problem] To provide a dye-sensitized solar cell having excellent photoelectric conversion efficiency and capable of saving the amount of a catalyst used, by using an inexpensive metal material showing excellent corrosion resistance in an electrolyte of a dye-sensitized solar cell for a counter electrode. [Means for Resolution] A dye-sensitized solar cell comprising a photoelectrode comprising a light-transmitting and conductive material and a semiconductor layer having a sensitizing dye supported thereon, formed on the surface of the light-transmitting and conductive material, an electrolyte and a counter electrode, wherein the counter is constituted of a material comprising a substrate comprising stainless steel containing Cr: 16% by mass or more, and Mo: 0.3% by mass or more, and a catalyst thin film layer formed on the surface of the substrate, and the semiconductor layer of the photoelectrode and the catalyst thin film, layer of the counter electrode face through the electrolyte.