TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Particle: The metallic compound particle is metal oxide chosen from zinc oxide and/or titanium oxide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Particle: The optical semiconductor particle consists of at least metallic compound particle and dye. Preferred Dye: The dye has polar group chosen from carboxyl group, sulfone group, hydroxyl group and/or nitro group in molecular structure.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Particle: The metallic compound particle is metal oxide chosen from zinc oxide and/or titanium oxide.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The separator is a non-woven fabric or a porous membrane consisting of polymeric material (M) insoluble with respect to electrolyte liquid. The porous membrane is formed using polyelectrolyte having high affinity with respect to electrolyte liquid capable of swelling polyelectrolyte, or electrolyte liquid. Preferred Material: The polymeric material (M) is fluorine resin, polyolefin-type resin, polyacrylonitrile-type resin, polyethylene oxide-type resin, acrylic-type resin, polysulfone base resin, epoxy resin and/or polyester resin. At least one portion of polymeric material is insoluble with respect to electrolyte liquid, and solid or gel characteristics is exhibited. The polymeric material contains solvent-soluble resin. The transparent electroconductive base material consists of polymeric base material or laminate of polymeric base material, and has flexibility. Preferred Resin: The fluorine resin is polyvinylidene fluoride resin and/or vinylidene fluoride copolymer resin. EXAMPLE - Acid Red87 (in g) (0.7), ethanol (200) and trimethylamine were mixed in a beaker. Finex50 (zinc oxide particle) (40) was added, and left for 20 minutes. The dyed zinc oxide particle was separated, and ethanol was removed. The resulting product was heated at 100degreesC, and optical semiconductor particle was produced. Kyner 301F (polyvinylidene fluoride resin) was added to N-methyl-2-pyrrolidone (85), and solution was stirred at room temperature to obtain polymeric solution. The obtained semiconductor particle and polymeric solution were blended in the weight ratio of 100:5, and dispersed for 30 minutes to obtain a coating material. The obtained coating material was coated on surface of indium tin oxide glass substrate, and dried at 80degreesC for 60 minutes to obtain photoelectric conversion electrode. A separator was arranged between the formed photoelectric conversion electrode and platinum board. An electrolyte liquid containing iodinated tetrapropyl ammonium and iodine was injected between electrodes, and optoelectric transducer was produced. The transducer had conversion efficiency of 1.63%.