▎ 摘　　要

NOVELTY - An ultra-thin graphene/molybdenum sulfide superlattice heterojunction material is a multilayer film obtained by laminating graphene and molybdenum disulfide film by layered transfer method. The film has material area of 0.25 mm2 to 1 cm2. The thickness of molybdenum sulfide is 0.65-3.5 nm. The graphene has thickness of 0.34-2 nm. Wet cycle method is used to form a superlattice heterostructure with total thickness of 3.96-110 nm. The period of the superlattice heterojunction is set to 4-20. The thickness of each cycle is 0.99-5.5 nm. USE - Ultra-thin graphene/molybdenum sulfide superlattice material is used in two-dimensional material/silicon heterojunction solar cell (claimed). ADVANTAGE - The large-area ultra-thin graphene/molybdenum sulfide superlattice heterojunction material efficiently improves photoelectric conversion efficiency of the solar cell, and can be prepared without increasing equipment cost. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of ultra-thin graphene/molybdenum sulfide superlattice heterojunction material; and (2) use of ultra-thin graphene/molybdenum sulfide superlattice heterojunction material in two-dimensional material/silicon heterojunction solar cell.