Fundamental and progress of Bi2Te3-based thermoelectric materials

Hong, Min and Chen, Zhigang and Zou, Jin (2018) Fundamental and progress of Bi2Te3-based thermoelectric materials. Chinese Physics B, 27 (4). pp. 1-25. ISSN 1674-1056

Abstract

Thermoelectric materials, enabling the directing conversion between heat and electricity, are one of the promising candidates for overcoming environmental pollution and the upcoming energy shortage caused by the over-consumption of fossil fuels. Bi2Te3-based alloys are the classical thermoelectric materials working near room temperature. Due to the intensive theoretical investigations and experimental demonstrations, significant progress has been achieved to enhance the thermoelectric performance of Bi2Te3-based thermoelectric materials. In this review, we first explored the fundamentals of thermoelectric effect and derived the equations for thermoelectric properties. On this basis, we studied the effect of material parameters on thermoelectric properties. Then, we analyzed the features of Bi2Te3-based thermoelectric materials, including the lattice defects, anisotropic behavior and the strong bipolar conduction at relatively high temperature. Then we accordingly summarized the strategies for enhancing the thermoelectric performance, including point defect engineering, texture alignment, and band gap enlargement. Moreover, we highlighted the progress in decreasing thermal conductivity using nanostructures fabricated by solution grown method, ball milling, and melt spinning. Lastly, we employed modeling analysis to uncover the principles of anisotropy behavior and the achieved enhancement in Bi2Te3, which will enlighten the enhancement of thermoelectric performance in broader materials.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Restricted access to published version in accordance with copyright policy of publisher.
Faculty / Department / School: No Faculty
Date Deposited: 24 May 2018 06:46
Last Modified: 30 May 2018 01:45
Uncontrolled Keywords: thermoelectric; Bi2Te3-based alloys; electron transports; phonon scatterings
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Funding Details:
Identification Number or DOI: 10.1088/1674-1056/27/4/048403
URI: http://eprints.usq.edu.au/id/eprint/34152

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