The present invention is a dye-sensitized
solar cell for low light intensities which is provided with: a first
electrode, which has a transparent substrate and a transparent conductive film provided on the transparent substrate; a second
electrode, which faces the first
electrode; an
oxide semiconductor layer, which is provided on the first electrode or the second electrode; an
electrolyte, which is provided between the first electrode and the second electrode; a photosensitization dye, which is adsorbed to the
oxide semiconductor layer; and a co-adsorption agent which is adsorbed to the
oxide semiconductor layer together with the photosensitization dye. Therein, the photosensitization dye is a
metal-complex compound represented by formula (1), and the co-adsorption agent includes an
organic compound represented by formula (2), or similar. (In formula (1) M represents Ru, R1, R2, R3 and R4 each independently represents a monovalent cation, and R5 and R6 each independently represents a
halogen group, or similar.) (In formula (2) n represents an integer 0-5, and R7 represents a monovalent group having a p-conjugated structure, or similar.)