High-performance BiCuSeO-base thermoelectric material and preparation method thereof

A thermoelectric material, high-performance technology, applied in the direction of thermoelectric device junction lead wire material, thermoelectric device manufacturing/processing, etc., can solve the problems of poor thermoelectric performance and low conductivity of BiCuSeO
CN110350074AActive Publication Date: 2019-10-18UNIV OF SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF SCI & TECH OF CHINA
Publication Date
2019-10-18

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Abstract

The invention provides a high-performance BiCuSeO-base thermoelectric material and a preparation method thereof. The thermoelectric material has a chemical formula I: Bi<1-x-Y>A<y>Cu<1-x>SeO, whereinA is selected from Ca, Sr, Ba or Pb0<x<=0.04, and 0<=y<=0.15. According to the thermoelectric material provided by the invention, Bi and Cu double vacancies are introduced, and then an interlayer charge transfer channel is constructed; after an element A (A is Ca, Sr, Ba or Pb) is doped into a Bi site, the conductivity of the material is remarkably improved by means of the interlayer charge transfer channel constructed by Bi / Cu double vacancies; meanwhile, a larger Seebeck coefficient is maintained, so that the thermoelectric performance of the material is improved.
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Description

technical field

[0001] The invention belongs to the technical field of new energy materials, and in particular relates to a high-performance BiCuSeO-based thermoelectric material and a preparation method thereof. Background technique

[0002] The increasing depletion of fossil energy represented by coal and oil, as well as the accompanying problems such as the greenhouse effect and environmental pollution, have aroused widespread concern from the whole society. Therefore, it is imminent to develop a new generation of low-carbon, green and sustainable new energy technologies. Thermoelectric materials enable direct and reversible conversion between electrical and thermal energy. Therefore, it is expected to convert various low-quality heat energy such as industrial waste heat, automobile exhaust, and the infrared part of the solar spectrum into electrical energy; Control and other fields also have great application prospects.

[0003] The conversion efficiency of thermoelec...

Claims

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