TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Method: The step of preparing substrate A includes forming the porous membrane including the carbon-based material and the platinum nanoparticles on one face of the first substrate having high temperature resistance, and stacking the adhesive layer and the second substrate on the porous membrane including the carbon-based material and the platinum nanoparticles in order, and heat-pressing the substrate. The porous membrane is formed by coating a paste including the carbon-based material, the platinum nanoparticle, a binder, and a solvent on one face of the first substrate having high temperature resistance, and heat-treating the same at the temperature of 450-500 degrees C for 1-2 hours. The step of preparing substrate B includes separating the first high temperature resistant substrate from the substrate A including the first high temperature resistant substrate, the porous membrane including the carbon-based material and the platinum nanoparticle, the adhesive layer, and the second substrate and transferring the porous membrane and the adhesive layer to a flexible substrate, by immersing the substrate A in a HF solution.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The carbon-based material is at least one of active carbon, graphite, carbon nanotube, carbon black, and grapheme. The metal nitride is consisting of a nitride of group IVB metallic element, a nitride of group VB metallic element, a nitride of group VIB metallic element, an aluminum nitride, a gallium nitride, an indium nitride, a silicon nitride and/or a germanium nitride, and the metal oxide is at least one of a tin oxide, a tin oxide doped with antimony, niobium, or fluorine, an indium oxide, an indium oxide doped with tin, a zinc oxide, a zinc oxide doped with aluminum, boron, gallium, hydrogen, indium, yttrium, titanium, silicon, or tin, a magnesium oxide, a cadmium oxide, a magnesium zinc oxide, an indium tin oxide, a copper aluminum oxide, a silver oxide, a gallium oxide, a zinc tin oxide, a titanium oxide, a zinc indium tin oxide, a nickel oxide, a rhodium oxide, a ruthenium oxide, an iridium oxide, a copper oxide, a cobalt oxide, a tungsten oxide and/or a titanium oxide. The carbon-based material is active carbon, graphite, carbon nanotube, carbon black or graphene. The particle sizes of the carbon-based material and the platinum nanoparticle are 10 nm to 100 mu m, respectively. The volume ratio of HF solution and water of the HF solution is 1:99-100:0. The porous membrane includes at least one metal oxide nanoparticles of a tin oxide, a tin oxide doped with antimony, niobium, or fluorine, an indium oxide, an indium oxide doped with tin, a zinc oxide, a zinc oxide doped with aluminum, boron, gallium, hydrogen, indium, yttrium, titanium, silicon, or tin, a magnesium oxide, a cadmium oxide, a magnesium zinc oxide, an indium tin oxide, a copper aluminum oxide, a silver oxide, a gallium oxide, a zinc tin oxide, a titanium oxide, a zinc indium tin oxide, a nickel oxide, a rhodium oxide, a ruthenium oxide, an iridium oxide, a copper oxide, a cobalt oxide, a tungsten oxide, a titanium oxide, a zirconium oxide, a strontium oxide, a lanthanum oxide, a vanadium oxide, a molybdenum oxide, a niobium oxide, an aluminum oxide, an yttrium oxide, a scandium oxide, a samarium oxide and/or a strontium titanium oxide.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The adhesive layer comprises a thermal bonding polymer film, a paste including a thermal bonding polymer, or an adhesive, and it is formed by using at least one compounds consisting of a thermosetting resin, a thermoplastic resin, an UV resin, an acrylic resin, an acrylic resin anaerobic, an acrylic emulsion, acrylic pressure sensitive adhesive tapes, a-olefin resin, a polyurethane resin, a polyurethane solvent type, an urethane emulsion, a polyurethane hot melt, a reactive hot melt adhesive, an ether cellulose, an ethylene-vinylacetate copolymer emulsion, an ethylene-vinylacetate copolymer hot melt, an epoxy resin, an epoxy emulsion, a polyvinyl chloride solvent type, a polyvinyl acetate emulsion, a polychloroprene rubber, a-cyanoacrylate, silicone adhesives, modified silicone adhesives, a water based polymer-isocyanate, a styrene-butadiene rubber solution type, a styrene-butadiene rubber latex, a nitrile rubber, a nitrocellulose, a phenolic resin, a polyamide hot melt, a polyimide, a polyolefin hot melt, a polyvinyl acetate solvent type, a polystyrene solvent type, a polyvinylalcohol, a polyvinylpyrrolidone, a polyvinylbutyral, a polybenzimidazole, a polymethylmethacrylate solvent type, a polymethylmethacrylate solvent type, an urea resin, and an urea resin. The first substrate having high temperature resistance is a metal substrate, a glass substrate, or a ceramic substrate, and the second substrate is a metal substrate, a glass substrate, a plastic substrate which is a flexible substrate, a fabric substrate, or a ceramic substrate The second substrate is at least one plastic substrates consisting of polyethylene terephthalate; polyethylene naphthalate; polycarbonate; polypropylene; polyimide; triacetylcellulose, polyether sulfone, an organic modified silicate of 3-dimensional network structure which is formed by hydrolysis-condensation reaction of at least one organic metal alkoxides consisting of methyltriethoxysilane, ethyltriethoxysilane, propyltriethoxysilane, and/or their copolymer. The third substrate is a metal substrate, a glass substrate, a plastic substrate, a fabric substrate, or a ceramic substrate. The adhesive layer includes a thermal bonding polymer film or a thermal bonding polymer resin. The photoelectrode includes the third substrate and a dye-adsorbed porous membrane. The third substrate is coated by FTO (F-doped SnO2: SnO2:F), ITO, a metal electrode having the average thickness of 1 to 1000 nm, a metal nitride, a metal oxide, a carbon compound, or a conductive film including a conductive polymer. The conductive polymer is at least one of poly(3,4-ethylenedioxythiophene)-poly (styrenesulfonate), polyaniline-CSA, pentacene, polyacetylene, P3HT (poly(3-hexylthiophene)), polysiloxane carbazole, polyaniline, polyethylene oxide, (poly(1-methoxy-4-(O-disperse red l)-2,5-phenylene-vinylene)), polyindole, polycarbazole, polypyridiazine, polyisothianaphthalene, polyphenylene sulfide, polyvinylpyridine, polythiophene, polyfluorene, polypyridine, polypyrrole and/or polysulfur nitride .