TECHNOLOGY FOCUS - POLYMERS - Preferred Components: (s1) Have functional groups capable of forming hydrogen bonds or chain-extending, crosslinking. The polymer electrolyte includes any one of (s1) or the mixture of (s1) with the polymer having a radius of gyration of 100 - 1000 Angstrom , and 1 - 10 wt.% of inorganic nanoparticle mixture capable of crosslinking (s1) and polymer, is coated on (a1) and (b1); or the polymer electrolyte, from which a solvent is volatilized, and which includes any one of (s1), and the mixture of (s1) with the polymer having a radius of gyration of 100 - 1000 Angstrom , and 10 - 50 wt.% of the inorganic nanoparticle mixture, is sequentially laminated on (a1) and (b1). (s1) Is poly(propylene glycol), poly(ethylene glycol), poly(ethylene glycol methylether), poly(ethylene glycol dimethylether) or their copolymers. The polymer having the radius of gyration of 100 - 1000 Angstrom is poly(ethylene oxide), poly(propylene oxide), poly(ethylene imine), poly(ethylene sulphide), poly(vinyl acetate), poly(ethylene succinate), poly(methacrylate) or poly(acrylate).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The crosslinking agent is glutaraldehyde, epichlorohydrin, vinylacrylate, maleic anhydride, formaldehyde, divinylsulfone, toluene diisocyanate or trimethylol melamine.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic nanoparticles are crosslinked with silica. The redox derivative includes a pair of iodide and iodine, or a pair of bromide and bromine. The iodide is a metal salt selected from lithium iodide, sodium iodide, potassium iodide or cesium iodide; or an imidazolium iodide selected from 1-methyl-3-propylimidazolium iodide or 1 -methyl-2-propylbenzimidazolium iodide. The bromide is a metal salt selected from lithium bromide, sodium bromide, potassium bromide or cesium bromide. EXAMPLE - Polyethylene oxide (PEO, radius of gyration (Rg) = 420 Angstrom , glass transition temperature (Tg) = -67degreesC, melting temperature (Tm) = 66degreesC) and polypropylene glycol (PPG, Rg = 10 Angstrom , Tg = -73degreesC, Tm = 66degreesC) in a predetermined ratio were dissolved in acetonitrile (9.5 g) to produce a homogeneous and transparent polymer solution (polymer concentration of 5 wt.%). Sodium iodide was added to the polymer solution so that a molar ratio of (-O-):(NaI) was 20:1. An amount of added iodine (I2) was fixed to 10 wt.%. Thus the polymer electrolyte was created. The polymer electrolyte solution was coated on a photoelectrode, including a titanium oxide layer, onto which an organic dye was adsorbed, and onto a counter electrode, on which platinum was coated, according to a multilayer coating method, adopting a two-stage coating process, to produce a dye-sensitized solar cell (test). A comparative dye-sensitized solar cell was prepared same as test except that polypropylene glycol was not used. A solvent was completely removed from both the solar cell using a vacuum oven for at least5 days, and an open-circuit voltage (Voc), a short-circuit current (Jsc), a fill factor (FF), and energy conversion efficiency (eta) of both the solar cell were evaluated at an incidence light condition of 10 mW cm-2 using a potentiostat/galvanostat and xenon (Xe) lamp (50 - 500 W). The results for test/comparative in terms of Voc, Jsc, FF and eta was found to be 0.68/0.60 V, 1.38/0.04 mA/cm2, 0.58/0.25 (unit not defined) and 5.44/0.07%, respectively.