NOVELTY - A semiconductor electrode (2) comprises a substrate (11) having optical transparency, a transparent conductive layer (12) provided on a photo-receptive surface of the substrate, and a porous semiconductor (13) made of a metal oxide provided on the transparent conductive layer. The porous semiconductor has at least dye (14) and a thiophene-ring-containing organic compound (15) adsorbed on it.    USE - As a semiconductor electrode useful for manufacturing a dye sensitized solar cell (claimed), useful for photovoltaic power generation.    ADVANTAGE - The semiconductor electrode provides a dye sensitized solar cell that can provide high photovoltaic conversion efficiency in the early stage after manufacturing, and even when driven for a longer time or driven after long term storage. The thiophene-ring-containing compound is more effective for coating the surface of the semiconductor electrode and for preventing desorption of the dye.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a dye sensitized solar cell comprising a semiconductor electrode (E1) and a counter electrode, where the semiconductor electrode and the counter electrode are placed opposite to each other via an electrolyte;    (2) a dye sensitized solar cell comprising a glass substrate having a concave channel formed, an interconnection composed mainly of a metal filled in the concave channel of the glass substrate, a transparent conductive layer formed so as to coat surfaces of the glass substrate and the interconnect, and a metal oxide layer formed on the surface of the transparent conductive layer, where the metal oxide layer has a dye and a thiophene-ring-containing organic compound adsorbed on it;    (3) manufacturing of a semiconductor electrode (E1) involving: forming a transparent conductive layer on a photo-receptive surface of a substrate having optical transparency; forming a porous semiconductor made of a metal oxide on the transparent conductive; bringing a dye into adsorption on a surface of the porous semiconductor; and bringing a thiophene-ring-containing compound into adsorption on a portion missing the dye adsorption in the surface of the porous semiconductor; and    (4) manufacturing of a dye sensitized solar cell, involving: bringing a thiophene-ring-containing compound into adsorption on a portion missing dye adsorption in a surface of a porous semiconductor in a semiconductor electrode (E1); placing the semiconductor electrode and a counter electrode via a spacer so that their conductive surfaces face to each other; filling an electrolyte between the semiconductor electrode and the counter electrode; and sealing the semiconductor electrode, counter electrode and spacer for integration.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of the semiconductor electrode.    a transparent substrate (11)    conductive layer (12)    porous semiconductor (13)    a dye (14)    organic compound containing thiophene-ring compound. (15)