Method for transferring graphene and graphene film obtained by method

Abstract

The invention discloses a method for transferring graphene and a graphene film obtained by the method. According to the method, graphene growing on a growth substrate is transferred to a target substrate by virtue of a double-sided adhesive film. The method comprises the steps that the growth substrate on which the graphene film grows is rolled and fitted by virtue of a thin double-sided adhesive film; the growth substrate is removed by the methods such as corrosion and stripping; the film is attached to the surface of the graphene; and the other surface is fitted with the target substrate, so that graphene is transferred to the target substrate from the growth substrate. The method has the advantages that the process is simple, the cost of transferring graphene can be greatly reduced, the graphene film with good binding force with the target substrate is obtained by using the viscosity of the double-sided adhesive tape, the binding force of graphene and the target substrate is improved, and the intact high-quality graphene film free of defects can be obtained.

Description

technical field [0001] The invention relates to a method for transferring graphene and a graphene film obtained by the method. Background technique [0002] Graphene is a single-layer two-dimensional planar structure in which carbon atoms hybridized by sp2 orbitals are closely arranged in a regular hexagon to form a honeycomb lattice, and its thickness is only 0.3354nm. It is the thinnest material found in the world. The graphene band gap is almost zero, and the carrier mobility (1.5×10 4 cm 2 / (V·s)) is more than 10 times higher than commercial silicon, and is expected to replace silicon as an ideal material for nanometer circuits. Graphene not only has excellent electrical properties and perfect structure, but also exhibits peculiar properties in other aspects, such as outstanding thermal conductivity, high light transmittance, extraordinary specific surface area, etc., which makes graphene widely used in electronics, information, and energy. And materials and other fi...

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Problems solved by technology

The defects of these two methods are also obvious: (1) when heat-release adhesive film or electrostatic protective film transfers graphene, when using high-temperature heating to release adhesive or remove static electricity, it may cause release or remove static electricity incompletely, so that the graphite obtained Oxygen is incomplete, and the price of thermal release tape is higher, which increases the production cost

It is difficult to accurately control the thickness of the adhesive layer by using a polymer adhesive to transfer graphene. It needs to be cured by UV light or heating, which consumes time and electricity, and increases the production cost during continuous production; (2) using heat release Adhesive tape transfer graphene, thermal release tape is expensive, cost increases, also will pass through high-temperature baking during degumming, affects the graphene performance of transfer; The combination is weak. When removing static electricity, either high-temperature heating or low-temperature cooling is used. High temperature affects performance. When the static electricity is not completely removed, the obtained graphene is damaged.

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