Structure of thermoelectric film

Abstract

A structure of a thermoelectric film including a thermoelectric substrate and a pair of first diamond-like carbon (DLC) layers is provided. The first DLC layers are respectively located on two opposite surfaces of the thermoelectric substrate and have electrical conductivity.

Description

technical field [0001] The present invention relates to a thin film structure, and in particular to a thermoelectric thin film structure. Background technique [0002] In the traditional thermoelectric application field, to judge whether a substance is a good thermoelectric material is mainly to observe its thermoelectric figure of merit (Figure of Merit, ZT value), and the ZT value is mainly related to the Seebeck coefficient (Seebeck coefficient), electrical conductivity and heat conduction The above three parameters also directly affect whether a material has good thermoelectric properties and whether it can be applied to the thermoelectric effect. The higher the ZT value, the more significant the thermoelectric effect, and its relationship is: [0003] ZT = α 2 σ k T [0004] In the above formula, α is the Seebeck coefficient; σ is ...

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Problems solved by technology

[0005] Since the physical properties of materials in nature are usually dependent on electrical conductivity and thermal conductivity, it is difficult for general materials to have good electrical conductivity and low thermal conductivity at the same time, so that the ZT value after the final sum cannot be effectively improved. Therefore, the electrical conductivity and thermal conductivity of materials The control of the coefficient becomes the key point to improve the thermoelectric performance, but it is also the bottleneck of the material development in terms of the current technology

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