▎ 摘　　要

NOVELTY - Method for preparing graphene composite electrode for quantum dot-sensitized solar cell, involves adding 12 gram sodium sulfide nonahydrate and 1.6 gram sublimed sulfur in 25 ml deionized water into the container. The mixture is stirred for 12-24 hours to obtain polysulfide electrolyte. 20 Ml of graphene solution with a mass concentration of 0.1-2 mg/ml is prepared in the container. The solution is transferred into a hydrothermal reaction kettle and treated ultrasonically for 1 hour. USE - Method used for preparing graphene composite electrode for quantum dot-sensitized solar cell (claimed). ADVANTAGE - The method enables to prepare graphene composite electrode for quantum dot-sensitized solar cell which improves the stability of battery, in a simple and repeated manner uniformly on the metal sheet. DETAILED DESCRIPTION - Method for preparing graphene composite electrode for quantum dot-sensitized solar cell, involves adding 12 gram sodium sulfide nonahydrate and 1.6 gram sublimed sulfur in 25 ml deionized water into the container. The mixture is stirred for 12-24 hours to obtain polysulfide electrolyte. 20 Ml of graphene solution with a mass concentration of 0.1-2 mg/ml is prepared in the container. The solution is transferred into a hydrothermal reaction kettle and treated ultrasonically for 1 hour. The copper piece is immersed with sandpaper and placed in hydrochloric acid solution with a mass concentration of 35-37% for 17-20 minutes at 70 degrees C. The copper piece is removed and treated with deionized water. The processed copper sheet is carried out for a hydrothermal reaction in the hydrothermal reactor at 90-120 degrees C for 5-12hours. The copper is grown on the three-dimensional structure of graphene which is further freeze-dried. The freeze-dried graphene composite copper sheet is placed in the polysulfide electrolyte for 10minutes, and finally the quantum dot sensitized solar cell graphene composite pair is obtained by the freeze-drying of the copper plate and the three-dimensional structure of the graphene on the copper electrode.