▎ 摘　　要

NOVELTY - Preparing a three-dimensional conformal coating of graphene metamaterial, comprises immersing a substrate with a three-dimensional nanostructure in a Poly(diallyldimethylammonium chloride) solution, rinsing and drying, coating a positively charged dielectric layer on the surface of the three-dimensional nanostructure, immersing the substrate coated with the dielectric layer in a graphene oxide solution, and rinsing and drying to coat a graphene oxide layer on the surface of the dielectric layer, and forming a three-dimensional conformal coating of graphene metamaterial on the surface of the three-dimensional nanostructure. USE - The method for preparing three-dimensional conformal coating of graphene metamaterial used in photovoltaic device e.g. silicon solar cell. ADVANTAGE - The method provides graphene super-material three-dimensional conformal coating with high depth-to-width ratio, thus realizing the reduction of optical reflection and improved surface passivation, improving the solar conversion efficiency, and has good popularization and application prospect and wide market value. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene super material three-dimensional conformal coating, obtained by the method as mentioned above.