Thermoelectric sensor based on graphene material, and preparation method thereof

Abstract

The invention belongs to the technical field of sensors, and particularly relates to a thermoelectric sensor based on a graphene material. The thermoelectric sensor comprises a first flexible layer, agraphene thermoelectric layer and a second flexible layer in sequence, wherein the graphene thermoelectric layer is attached to the first flexible layer, the graphene thermoelectric layer is of a grid-shaped structure, leading-out terminals are arranged at both ends of the graphene thermoelectric layer, the leading-out terminals are connected with an external circuit through conducting wires, andthe second flexible layer is attached to the first flexible layer and the graphene thermoelectric layer; and the coefficient of thermal expansion of the first flexible layer is 10 to 50 times greaterthan the coefficient of thermal expansion of the second flexible layer. At the same time, the invention further provides a preparation method of the thermoelectric sensor. The thermoelectric sensor provided by the invention has the advantages of excellent recovery performance, fast heat dissipation, fast response, simple structure and the like.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a graphene material-based pyroelectric sensor and a preparation method thereof. Background technique [0002] Many studies have now involved the development of electrothermal sensors. Structurally, pyroelectric sensors are composed of three layers, generally prepared as a sandwich structure, that is, the active layer and the upper and lower substrates based on the active layer. When electricity is applied, the active layer heats up causing changes in the physical properties of its substrate. Materials with such high thermal conductivity are generally carbon-based materials, such as CNT, graphene, carbon black, etc. Among them, graphene, as a material with the highest thermal conductivity, is often used in flexible devices such as heating films and eye shields. The high thermal conductivity of graphene also further supports the application prospects of graphene as a n...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of poor recovery, slow heat dissipation, and hysteresis of response in the prior art, and provide a thermoelectric sensor based on graphene material with excellent recovery, fast heat dissipation, fast response, and simple structure

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