SOLAR-CELL-INTEGRATED GAS PRODUCTION DEVICE

The present invention provides a solar-cell-integrated gas production device that can generate a first gas and a second gas by utilizing an electromotive force of a solar cell, and that can supply power to an external circuit by utilizing the same solar cell. The solar-cell-integrated gas production device according to the present invention comprises: a photoelectric conversion part having a light acceptance surface and its back surface; a first electrolysis electrode provided on the back surface of the photoelectric conversion part so as to be capable of being immersed into an electrolytic solution; a second electrolysis electrode provided on the back surface of the photoelectric conversion part so as to be capable of being immersed into the electrolytic solution; and a changeover part, wherein the first electrolysis electrode and the second electrolysis electrode are provided to be capable of electrolyzing the electrolytic solution to generate a first gas and a second gas by utilizing an electromotive force generated by irradiating the photoelectric conversion part with light, and the changeover part makes a changeover between a circuit that outputs the electromotive force, generated by irradiating the photoelectric conversion part with light, to a first external circuit, and a circuit that outputs the electromotive force, generated by irradiating the photoelectric conversion part with light, to the first electrolysis electrode and the second electrolysis electrode.