▎ 摘　　要

NOVELTY - Single-layer planar graphene having a uniform layer thickness, where the graphene film is obtained by pre-treating a copper foil, drying in an inert gas atmosphere, placing the dried copper foil in a quartz tube, sealing both ends of the quartz tube with flanges, pumping to 50Pa with a vacuum pump, introducing argon to normal pressure, heat-treating the quartz tube to grow graphene on the copper foil, cooling the temperature in the quartz tube to room temperature, taking out the copper foil with graphene, curing and finally transferring the graphene on the copper foil. USE - As single-layer planar graphene with uniform layer thickness. ADVANTAGE - The single-layer planar graphene is grown on a copper substrate by an optimized chemical vapor deposition method, where the graphene film is a single layer and has a high degree of crystallinity, small defects, large-area and excellent light transmittance and electrical conductivity.