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SnSe/CNT high-temperature flexible thermoelectric thin film material and preparation method thereof

A thermoelectric thin film, high-temperature flexible technology, applied in the field of tin selenide/carbon nanotube high-temperature flexible thermoelectric thin film material and its preparation, can solve the problems of low thermal conductivity, etc., achieve high crystallinity, improve flexibility, and ensure thermoelectric performance Effect

Active Publication Date: 2021-05-28
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

SnSe has excellent electrical and heat transport properties, and has a unique crystal structure that leads to extremely low thermal conductivity, combined with a unique electronic structure, endowing it with high power factor and excellent thermoelectric performance. Therefore, SnSe is a potential for development. thermoelectric materials, but there are few research reports on their thermoelectric properties

Method used

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  • SnSe/CNT high-temperature flexible thermoelectric thin film material and preparation method thereof
  • SnSe/CNT high-temperature flexible thermoelectric thin film material and preparation method thereof
  • SnSe/CNT high-temperature flexible thermoelectric thin film material and preparation method thereof

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Embodiment 1

[0035] In this embodiment, the preparation method of SnSe / CNT high-temperature flexible thermoelectric thin film material includes the following steps:

[0036] (S1) Surface treatment:

[0037] Clean the surface of the substrate (such as: silicon dioxide wafer), rinse with alcohol, acetone and deionized water for 12 minutes, and then heat and bake at 398K for 20 minutes in a vacuum environment;

[0038] The substrate (such as: CNT) is fixed on the metal bracket by electrostatic force, and the metal bracket is fixed on the coated sample plate with silver glue, and baked at 398K for 20 minutes;

[0039] Such as image 3 As shown, the structure of the metal bracket is to carve out 5 small frames of size from a 4cm×3cm copper plate: three 3cm×1cm are arranged side by side vertically, one 1cm×1cm and one 2cm×1cm are facing each other horizontally, The metal material used is copper, and the dimensions are shown in the schematic diagram. The carbon nanotubes 2 can be flatly spread...

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Abstract

The invention relates to the field of functional thin film materials, in particular to a SnSe / CNT high-temperature flexible thermoelectric thin film material and a preparation method thereof. The composite thin film is prepared by utilizing a physical vapor deposition technology, so that a certain crystallographic direction of selenide crystal grains is parallel to the axis direction of a CNT tube bundle, and a flexible composite thin film material with a certain out-of-plane orientation nanoscale porous structure is formed. The material comprises a carbon nanotube film substrate and a SnSe functional film uniformly deposited on the surface of a carbon nanotube bundle, the specific crystallographic direction of SnSe crystal grains is parallel to the groove and axis direction of the CNT bundle, a small-angle orientation tilting grain boundary is formed between adjacent crystal grains, and a three-dimensional composite network with a nano-porous structure is formed. The SnSe / CNT high-temperature flexible thermoelectric material has relatively good thermoelectric performance and flexible performance, fills the gap of a high-temperature flexible thermoelectric film material, and provides a thought for the research of medium-high-temperature flexible thermoelectric materials.

Description

technical field [0001] The invention relates to the field of functional thin film materials, specifically a tin selenide (SnSe) / carbon nanotube (CNT) high temperature flexible thermoelectric thin film material and a preparation method thereof. The thin film material can provide inspiration for the research of medium and high temperature flexible thermoelectric materials The thin film material can be used as a certain application potential in deep space exploration and automobile exhaust waste heat treatment. Background technique [0002] SnSe surprised the scientific community by displaying unexpectedly low thermal conductivity and high power factor, and it has emerged as a very promising thermoelectric material. Thermoelectric material is a functional semiconductor material that can convert two different forms of energy, "heat" and "electricity", without the assistance of other specific external forces or devices. It can make full use of waste heat in daily production and l...

Claims

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Application Information

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IPC IPC(8): C30B29/46C30B23/08H01L35/16
CPCC30B29/46C30B23/08C30B23/025H10N10/852
Inventor 邰凯平万晔崔岩赵洋乔吉祥康斯清
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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