Silver selenide thermoelectric composite film and preparation method and application thereof

Abstract

The invention provides a silver selenide thermoelectric composite film and a preparation method and application thereof, and belongs to the technical field of thermoelectric films, and the preparation method comprises the following steps: mixing silver selenide, a solvent, a binder and a PEDOT: PSS aqueous solution, crushing, depositing on a substrate, and drying to obtain the silver selenide thermoelectric composite film. Silver selenide is adopted for preparing the composite film, in the smashing process, the particle size of the silver selenide is reduced, particles are in tight contact after deposition, the binding tightness between the particles can be further improved by adding the binder, the high Seebeck coefficient value is achieved, the internal resistance of the film is reduced, meanwhile, the binding property of the silver selenide and a substrate is improved, and by adding the PEDOT: PSS aqueous solution, the composite film is prepared. By utilizing the high conductivity characteristic, the internal resistance of the film is further reduced, and the thermoelectric performance of the film is improved. The result of the embodiment shows that the thermoelectric device prepared by the composite film prepared by the invention can generate 7.4 mv voltage by utilizing the temperature difference between the human skin and the environment.

Description

technical field [0001] The invention relates to the technical field of thermoelectric thin films, in particular to a silver selenide thermoelectric composite thin film and its preparation method and application. Background technique [0002] Heat energy is closely related to life. As the main forms of unused energy in social life, waste heat from automobile exhaust, waste heat from industrial equipment, and heat released by human metabolism have triggered human thinking about energy recovery. Thermoelectric technology is a promising solution. Provides the possibility for waste heat recovery. [0003] Thermoelectric devices based on the thermoelectric effect have the ability to generate electricity by temperature difference. With the help of special semiconductor materials, thermal energy can be directly converted into electrical energy, and energy recycling can be realized without pollution and noise. Due to the Seebeck effect of thermoelectric semiconductors, when there is...

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Problems solved by technology

[0004] Ag 2 Se has good electrical conductivity and high Seebeck coefficient, and can be used to make generators at room temperature. The current common method is to directly prepare paper-based thermoelectric films from the dispersion of silver selenide particles by suction filtration, but this method prepares The internal resistance of the film is relatively large, and the output power is very small

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