PURPOSE: To manufacture simply a solar cell to reduce the cost of the generation of electric power into low cost by a method wherein the solar cell is constituted into a structure wherein a positive pole consisting of a nitrogen-containing heterocyclic compound polymeric film is arranged along with a titanium dioxide film via a solid or liquid electrolyte.

CONSTITUTION: A nitrogen-containing heterocyclic compound polymer, such as a polyaniline and a polypyrrole, obtainable by an electrolytic polymerization, a chemical oxidative polymerization or a photo-oxidation polymerization is treated, is film-formed on a conductive glass or the like as a film in the state of a P-type semiconductor film and is used as a positive pole. As an N-type inorganic semiconductor film, a titanium dioxide film, which is adjusted from a colloidal solution, is calcined and has a good transparency, is used. As an electrolyte for separating these of the polyaniline and the titanium dioxide film from each other, various redox inorganic salts and acids, a solution obtainable by dissolving a basic substance or a solid electrolyte containing a substance of an ionicity is used. By emitting light on such the polyaniline and the titanium dioxide film with the solid or liquid electrolyte between the polyaniline and the titanium dioxide film, a solar cell for obtaining a photocurrent is constituted.