Graphene adhesion enhanced composite conductive structure and preparation method thereof

Abstract

The invention discloses a graphene adhesion-enhanced composite conductive structure capable of realizing the enhanced adhesion of graphene to a target substrate, and a preparation method thereof. Thegraphene adhesion-enhanced composite conductive structure comprises a CVD graphene layer, a conductive polymer layer, and a target substrate arranged from top down. The preparation method comprises the steps of: S1, generating a graphene layer on the catalytic substrate; S2, coating a thermoplastic resin I on the surface of the grapheme to form a transition support layer I; S3, continuing to coata thermoplastic resin II on the surface to form a transition support layer II; S4, separating the catalytic substrate to obtain a structure IV; S5, coating the conducting polymer on the target substrate to obtain a structure V; S6, dragging a structure IV from the structure IV from water by the wet process; S7, removing the transition support layer II; and S8, removing the transition support layerI, thereby obtaining the composite structure VII. The graphene adhesion-enhanced composite conductive structure and the preparation method thereof are used to keep the graphene intact and not damaged, and the complete transfer preparation of the large-area graphene may be realized.

Description

technical field [0001] The invention relates to the technical field of graphene production, in particular to a large-area clean and non-destructive transfer composite conductive structure with enhanced CVD graphene adhesion and high flatness and a preparation method thereof. Background technique [0002] As we all know: graphene is a new type of two-dimensional carbon nanomaterial discovered in the past ten years. It has excellent mechanical, optical, electrical, and thermal properties. As a new transparent conductive material, it has attracted much attention in the industry. The theoretically perfect graphene is a two-dimensional continuous six-membered ring structure, all carbons are in the form of methine structures, without any polar side groups. [0003] The high-quality single-layer graphene prepared by the CVD method (chemical vapor deposition technology) that is closer to the ideal structure has very few oxygen-containing polar groups at the microscopic scale, so tha...

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Problems solved by technology

[0005] 1) Wet transfer of thermoplastic rigid resins, such as polymethyl methacrylate, etc., graphene can be transferred completely, but the dry film is thin, brittle and fragile, and can only be operated in small sizes, not suitable for large-area transfer;

[0006] 2) The dry transfer of thermo-release tape can realize large-area transfer, but the adhesive film is solid, it is difficult to form a sufficient intermolecular adhesion with graphene, and the release of internal stress is large, the transfer is incomplete, and a large number of graphene fragments are formed. It is difficult to prepare a complete and continuous graphene layer;

[0007] 3) UV adhesive or hot melt adhesive curing transfer, the curing process, from liquid to solid, can achieve complete large-area transfer, but it is difficult to clearly reproduce the polycrystalline texture of the catalytic substrate, the surface roughness is high, and the haze is large, which is difficult to meet the micro High-end application technology requirements for transparent electrodes such as nanoelectronic devices, displays, and solar cells

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