TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The kit further contains sensitizing dye (5) or sensitizing dye liquid, counter electrode substrate, pencil, tape, squeegee stick, clip, syringe and electric drive components. The metal oxide dispersion liquid contains metal oxide microparticles (5-60 mass%, preferably 10-40 mass%), binder (0.01-20 mass parts), with respect to metal oxide microparticles (100 weight parts), and dispersion medium. The metal oxide microparticles are titanium oxide, niobium oxide, tin oxide, zinc oxide, magnesium oxide, indium oxide, zirconium oxide, strontium titanate and/or barium titanate. The metal oxide microparticles contain titanium oxide (60 mass% or more). Preferred Properties: The metal oxide microparticles have Brunauer Emmett Teller (BET) specific surface area of 5-500 m2/g and primary particle size of 5-500 nm measured by transmission electron microscope observation. The metal oxide microparticles have 90% accumulation mass particle size of 2.2 microns or less, by laser diffraction type particle size distribution measuring device, and has distributed constant of 1.7 or more by Rosin-Rammler formula. The transparent electrode substrate has surface resistance value of 20 Omega/square units or less, and has average transmittance of 50% or more, with respect to light of wavelength 300-800 nm. Preferred Component: Titanium oxide is manufactured by carrying out high temperature oxidation of titanium tetrachloride by oxidizing gas which is preheated at 500degreesC or more, at a supply rate of 10 m/second, by gaseous phase method.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The dispersion medium is a volatile fluid having hydroxyl group, carboxyl group, ketone group, aldehyde group, amino group and/or amide group in its structure. The dispersion medium is water, methanol, ethanol, butanol, methyl cellosolve, ethylene glycol, acetic acid, acetyl acetone, turpentine oil and/or methyl pyrrolidone. The transparent electrode substrate has an electrically conductive film which contains copolymers which contain repeating units such as poly(isothianaphthene sulfonic acid), poly(thiophene alkane sulfonic acid), poly(thiophene oxy alkane sulfonic acid), poly(pyrrole alkane sulfonic acid) and poly(aniline sulfonic acid), or their salts and derivatives. The iodine type electrolyte liquid is tetra-butyl ammonium iodide, lithium iodide, methyl ethyl imidazolium iodide, methyl propyl imidazolium iodide and/or iodine. The iodine type electrolyte liquid contains water, ethanol, t-butyl alcohol, acetonitrile, ethylene carbonate, methoxy propionitrile and/or propylene carbonate as solvent. The sensitizing dye is a pigment extracted from plant/animal tissue, foodstuffs, cosmetics and pharmaceutical. The sensitizing dye is ruthenium bipyridinium complex, xanthene type pigment metallocyanine dye, porphyrin derivative and/or phthalocyanine derivative. Preferred Process: The dispersion liquid applied on transparent electrode substrate is dried at 120degreesC or less, by spraying warm air, irradiating infrared rays, temperature increase and/or spraying dry air. The thin film of metal oxide has thickness of 1-40 microns.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The binder is a polymer compound which does not contain hydroxyl group or amino group, preferably poly N-vinyl acetamide, polyvinyl pyrrolidone, polyacrylamide, polyacrylate, N-vinyl acetamide-sodium-acrylate copolymer, acrylamide-sodium-acrylate copolymer and/or polytetrafluoroethylene. The binder has mean molecular weight of 500 or more, preferably 10000 or more. Preferred Composition: The counter-electrode substrate is formed by kneading carbon fiber, carbon black and/or graphite with binder(s) chosen from polytetrafluoroethylene and tetrafluoroethylene poly fluorinated propylene copolymer, tetrafluoroethylene-polyfluoroalkyl vinyl ether copolymer, polyvinylidene fluoride, polyethylene fluoride and styrene butadiene rubber, and contains ruthenium mesh, platinum board, platinum fiber and platinum in its surface. EXAMPLE - Ruthenium complex pigment (Ru(dcbpy)2(NCS)2) was dissolved in ethanol to obtain a pigment solution. Lithium iodide of purity 97%, iodine and tetrabutyl ammonium iodine salt of purity 98% were dissolved in propylene carbonate, to obtain iodine group electrolyte liquid. Microparticles of titanium dioxide (in g) (10) having Brunauer Emmett Teller (BET) specific surface area of 102 m2/g, primary particle size of 15 nm and 90% accumulation mass particle size distribution of 2.0 microns, 5 mass% aqueous solution (10) of poly N-vinyl acetamide of mean molecular weight 10000, pure water (30) and zirconia ball (200) were mixed for 30 minutes to obtain titanium dioxide dispersion liquid. Transparent electrode substrates, obtained pigment solution (50 ml), iodine group electrolyte liquid (10 ml) and titanium dioxide dispersion liquid (10 ml) were mixed to obtain kit for dye sensitized solar cell.