NOVELTY - Titanium dioxide nanopowder is calcined, and ethanol, acetic acid and binder are added to obtain slurry. The slurry is coated on glass substrate to form titanium dioxide porous film on glass substrate. The film is impregnated with silver solution, washed, immersed in sulfide ion solution, and successive ionic layer adsorption and reaction is carried out to obtain silver sulfide-quantum dot-sensitized titanium dioxide electrode. Indium salt, sulfur source, and complexing agent precursor are added to reactor, electrode is placed in reactor, heated, and dried to obtain photoelectrode.    USE - Preparation of photoelectrode used for solar cell.    ADVANTAGE - The method provides photoelectrode using simple device, by simple process.    DETAILED DESCRIPTION - Titanium dioxide nanopowder is calcined, pre-treated, water is added to pre-treated titanium dioxide nanopowder, ethanol, acetic acid and binder are added, ball-milled, and concentrated under reduced pressure to obtain titanium dioxide thick slurry. The slurry is coated on fluorine-tin oxide conductive glass substrate, and calcined to form titanium dioxide porous film on glass substrate. The titanium dioxide porous film is impregnated with aqueous silver solution, washed with deionized water and ethanol, immersed in aqueous sulfide ion solution, washed with deionized water and ethanol, successive ionic layer adsorption and reaction (SILAR) is carried out, and washed with deionized water and ethanol to obtain silver sulfide-quantum dot-sensitized titanium dioxide electrode. Indium salt, sulfur source, and complexing agent precursor homogeneous solution are added to hydrothermal reactor, silver sulfide-quantum dot-sensitized titanium dioxide electrode is placed in solution, heated to 80-200 degrees C, hydrothermal reaction is carried out for 2-10 hours, cooled to room temperature, washed with deionized water and ethanol, and dried to obtain silver-indium sulfide buffer layer-quantum dot-sensitized titanium dioxide photoelectrode.