NOVELTY - A quantum point-sensitized solar energy cell comprises a photoanode, fluorine-doped tin oxide (FTO) conductive glass, strontium titanate thin film semiconductor, redox electrolyte and an electrode. Quantum dots sensitizer composition is deposited on the thin film semiconductor. The redox electrolyte is polysulfide redox ion pair sulfide dianion electrolyte or sulfide dianion-hydroxylate anion electrolyte. The electrode is supported platinum or copper sulfide contained in the FTO conductive glass.    USE - Quantum point-sensitized solar energy cell.    ADVANTAGE - The quantum point-sensitized solar energy cell maintains excellent battery performance even after multiple tests and delayed testing, and has positive significance for overall performance.    DETAILED DESCRIPTION - A quantum point-sensitized solar energy cell comprises a photoanode, FTO conductive glass, strontium titanate thin film semiconductor, redox electrolyte and an electrode. Quantum dots sensitizer composition is deposited on the thin film semiconductor. The redox electrolyte is polysulfide redox ion pair sulfide dianion (S2-) /(Sn2-) electrolyte or sulfide dianion-hydroxylate anion electrolyte. The electrode is supported platinum or copper sulfide contained in the FTO conductive glass. The FTO conductive glass portion and electrode back portion are sealed with hot melt. The FTO conduction glass comprises molybdenum or copper sulfide carrier. An INDEPENDENT CLAIM is included for a method for preparing a quantum point-sensitized solar energy cell, which involves mixing strontium titanate nanopowder and ethyl cellulose in mass ratio of 1:0.2-0.3, adding terpineol as solvent to the mixture, adding 0.12-0.18 ml acetic acid and 25-35 ml ethanol to the mixture to obtain slurry, grinding the slurry with mortar for 2-3 hours, coating the slurry on the FTO conductive glass, and calcining the glass at 495-505 degrees C for 25-35 minutes. The mass ratio of the strontium titanate and terpineol is 1:3-4.5.