NOVELTY - A transparent fluorine-doped tin oxide conductive glass is repeatedly cleaned using isopropyl ketone, alcohol and deionized water alternately, filtered, purified and dried. The cleaned glass is annealed, and then naturally cooled to room temperature. Hydrated salt of zinc, polymer, solvent and catalyst are added to a beaker, heated, and magnetically stirred, to obtain uniform and transparent zinc oxide precursor polymer gel. Thus, method of improving hardenability of dye-sensitized solar battery substrate interface is carried out.    USE - Method of improving hardenability of dye-sensitized solar battery substrate interface.    ADVANTAGE - The method efficiently and economically improves hardenability of dye-sensitized solar battery substrate interface such that the battery has excellent durability.    DETAILED DESCRIPTION - A transparent fluorine-doped tin oxide conductive glass is repeatedly cleaned using isopropyl ketone, alcohol and deionized water alternately for 10 minutes, filtered, purified and dried using hot air in a drier. The cleaned glass is annealed at 400-450 degrees C for 30-60 minutes with speed of 1-2 degrees C/minute in a tube heating furnace, and then naturally cooled to room temperature along the furnace. Hydrated salt of zinc, polymer, solvent and catalyst are added to a beaker, heated to 60 degrees C, and magnetically stirred for 6 hours with rotation speed of 240-400 rpm, to obtain uniform and transparent zinc oxide precursor polymer gel. The prepared precursor polymer gel is injected to an injector, fed to a stainless steel spinning jet needle hole at flow rate of 40-60 mu l/minute by an injection pump such that the stainless steel spinning jet is connected with high-voltage supply, the external load voltage is maintained to 10-15 kV, and distance between the stainless steel spinning jet needle hole and the earth electrode collecting substrate is adjusted to 10-15 cm. The electro-spinning device is initiated, zinc oxide precursor polymer nano-fibers are collected on the conductive glass perpendicular to the lower end of injection pump spinning jet needle hole under the action of electric field, to form precursor polymer stress buffer layer nanofiber film having thickness of 100-200 nm. The formed layer is hot-pressed at 120-150 degrees C in a flattening oven for 10-15 minutes. A polytetrafluoroethylene sheet having thickness of 1-2 mm is interposed between a metal disk and the zinc oxide precursor polymer nano-fiber film. The zinc oxide precursor polymer nano-fiber film is vacuum dried at 80 degrees C for 24 hours, sintered, heated at 400-450 degrees C for 30-60 minutes, and naturally cooled to room temperature along the furnace, to obtain stress buffer layer of zinc oxide precursor polymer nanofiber film. A semiconductive zinc oxide working electrode is formed on the conductive glass coated with the stress buffer layer of zinc oxide precursor polymer nanofiber film by using wet chemical method, sintered at 400-450 degrees C for 30-60 minutes, and naturally cooled to room temperature along the furnace, to obtain zinc oxide nano-fiber photoelectrode of dye sensitized solar battery apparatus. The obtained photoelectrode is sensitized using N3 or N719 dye, pair electrode with hole and the semiconductor working electrode are packed using capillary adsorption principle to inject the electrolyte containing iodine ion, and small hole for injecting the electrolyte on the pair electrode is sealed, to obtain the dye sensitized solar battery apparatus.