TITANIUM OXIDE FILM, SEMICONDUCTOR ELECTRODE, AND DYE-SENSITIZED SOLAR CELL

摘要

PROBLEM TO BE SOLVED: To provide an inexpensively-manufacturable dye-sensitized solar cell that improves photoelectric conversion efficiency, and a semiconductor electrode and a titanium oxide film that are applicable to the dye-sensitized solar cell.

SOLUTION: A titanium oxide film 12 as an underlying film is formed on a transparent conductive film 15 constituting a substrate 11. As shown in Fig. 2, the titanium oxide film 12 is composed of an anatase titanium oxide that forms a needle-like crystal grown from one face 11a of the substrate 11, namely, from the transparent conductive film 15 toward the vertical direction L. The anatase titanium oxide forming such a needle-like crystal forms a needle-like or columnar crystal structure in which a crystal axis is vertically and selectively grown.

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