TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Method: In the method, the rate of decrease in photoelectric conversion efficiency after 100-300 times bending test using a bending tester with a diameter of 7 mm is less than or equal to 50% compared to initial efficiency. The step of coating of the polymer solution is performed by spin coating, slit coating or dip coating. The heat treatment is conducted at 20-150 degrees C for 10-30 minutes. The step of adsorbing of dyes comprises impregnating the flexible substrate on which a porous membrane comprising the metal oxide nanoparticles is formed in a solution comprising photosensitive dyes for 10 minutes to 24 hours. Preferred Components: The counter electrode comprises a flexible substrate, a conductive film and a catalyst layer formed on the flexible substrate. The electrolyte is an oxidation-reduction derivative, polymer gel electrolyte containing polymer or inorganic particles, organic hole conductor (hole conducting material or 2,2',7,7'-tetrakis-N,N-di-p-methoxyphenylamine-9,9'-spirobifluorene), or P type semiconductor (copper thiocyanate). The flexible dye-sensitized solar cell further comprises a heat adhesion polymer film or paste adhesive for sealing the photoelectrode and the counter electrode.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The metal flexible substrate comprises at least one iron, stainless steel, aluminum, titanium, nickel, copper or tin. The porous membrane includes metal oxide nanoparticles comprising: tin oxide; antimony, niobium or fluorine-doped tin oxide; indium oxide; tin-doped indium oxide; zinc oxide; aluminum, boron, gallium, hydrogen, indium, yttrium, titanium, silicon or tin-doped zinc oxide; magnesium oxide; cadmium oxide; magnesium zinc oxide; indium zinc oxide; copper aluminum oxide; silver oxide; gallium oxide; zinc tin oxide; titanium oxide; zinc indium tin oxide; nickel oxide; rhodium oxide; ruthenium oxide; iridium oxide; copper oxide; cobalt oxide; tungsten oxide; zirconium oxide; strontium oxide; lanthanum oxide; vanadium oxide; molybdenum oxide; niobium oxide; aluminum oxide; yttrium oxide; scandium oxide; samarium oxide; and/or strontium titanium oxide. The conductive film comprises tin oxide:fluorine, indium tin oxide, a metal electrode having an average thickness of 1-1000 nm, metal nitride, metal oxide, a carbon compound, or conductive polymer. The metal nitride is nitride of group IVB metal atom, group VB metal atom, group VIB metal atom, aluminum nitride, gallium nitride, indium nitride, silicon nitride, and/or germanium nitride. The metal oxide is: tin oxide; antimony, niobium or fluorine-doped tin oxide; indium oxide; tin-doped indium oxide; zinc oxide; aluminum, boron, gallium, hydrogen, indium, yttrium, titanium, silicon or tin-doped zinc oxide; magnesium oxide; cadmium oxide; magnesium zinc oxide; indium zinc oxide; copper aluminum oxide; silver oxide; gallium oxide; zinc tin oxide; titanium oxide; zinc indium tin oxide; nickel oxide; rhodium oxide; ruthenium oxide; iridium oxide; copper oxide; cobalt oxide; tungsten oxide; and/or titanium oxide. The conductive polymer is poly(3,4-ethylenedioxythiophene)-(poly(styrenesulfonate)), polyaniline-camphorsulfonic acid, pentacene, polyacetylene, (poly(3-hexylthiophene), polysiloxane carbazole, polyaniline, polyethylene oxide, poly(1-methoxy-4-(O-disperse red 1)-2,5-phenylene-vinylene, polyindole, polycarbazole, polypyridiazine, polyisothianaphthalene, polyphenylene sulfide, polyvinylpyridine, polythiophene, polyfluorene, polypyridine, polypyrrole, polysulfur nitride, and/or their copolymer.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent is ethanol, methanol, terpineol, lauric acid, ethyl acetate, hexane or toluene. The carbon compound is activated carbon, graphite, carbon nanotube, carbon black, and/or graphene.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer solution: is a colloidal solution where a polymer (0.01-10 wt.%) is dispersed in a solvent; and includes at least one polymer comprising polyurethane, polyethylene oxide, polyvinylpyrrolidone, polypropylene oxide, polyethylene glycol, chitosan, chitin, polyacrylamide, polyvinyl alcohol, polyacrylic acid, cellulose, ethyl cellulose, polyhydroxyethyl methacrylate, polymethyl methacrylate, polysaccharide, polyamide, polycarbonate, polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polyethylene naphthalate, or a silicon-containing polymer comprising polydimethylsiloxane, isoprene, butadiene-based rubber or their derivatives. The flexible substrate is: a plastic substrate comprising polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polypropylene, polyimide, triacetylcellulose, polyethersulfone, organically modified silicate of a three dimensional network structure formed by hydrolysis and condensation reaction of organometal alkoxide of at least one consisting of methyltriethoxy silane, ethyl triethoxy silane or propyltriethoxysilane, and/or their copolymers; or a metal flexible substrate. EXAMPLE - Solution formed by dispersing titanium oxide nanoparticles (8 g) in ethanol (200 ml) was agitated (40 minutes) with a mechanical agitator to prepare a uniform colloidal solution. To increase the viscosity of the solution, the solvent was distilled at 50 degrees C, 170 rpm using a rotary evaporator to prepare a paste. The paste was coated on a plastic substrate (indium tin oxide/polyethylene naphthalate) by doctor blade method, and then, heat treated at 100 degrees C for 2 hours to remove the solvent thus manufacturing an electrode with a thickness of 6 mu m. Then, the complex electrode was impregnated with an ethanol solution comprising 0.5 mM of ruthenium type photosensitive dye N719 (bis(tetrabutylammonium)-cis-(dithiocyanato-N,N'-bis(4-carboxylato-4'-carboxylic acid-2,2'-bipyridine))ruthenium(II)) at 50 degrees C for 1 hour to absorb the photosensitive dyes on the surface of the nanoparticles of the porous metal oxide layer. Then, polymethylmethacrylate polymer was dissolved in ethyl acetate to prepare a polymer solution. The prepared polymer solution was dropped on a dye-adsorbed metal oxide nanoparticle layer, and allowed to stand for 1-10 minutes so that the polymer may be penetrated into the nanoparticle metal oxide, and then, spin coated at 2000 rpm and heat treated at 25 degrees C for 10 minutes. Through these processes, the polymer was penetrated in the porous membrane of the dye-adsorbed nanoparticle metal oxide to prepare a complex of nanoparticle metal oxide polymer.