Computer-aided design of high-efficiency GeTe-based thermoelectric devices

Hong, Min and Zheng, Kun and Lyv, Wanyu and Li, Meng and Qu, Xianlin and Sun, Qiang and Xu, Shengduo and Zou, Jin and Chen, Zhi-Gang ORCID: https://orcid.org/0000-0002-9309-7993 (2020) Computer-aided design of high-efficiency GeTe-based thermoelectric devices. Energy & Environmental Science, 13 (6). pp. 1856-1864. ISSN 1754-5706


Abstract

Driven by materials science development, the thermoelectric performance has been enhanced. However, only increasing the figure of merit to enhance the thermoelectric efficiency becomes more challenging. Here, we combine an enhanced figure of merit and geometry optimization of a device by computer-aided design to achieve a record-high thermoelectric efficiency of 16%. A figure of merit over 2.2 in p-type Ge1−x−yCrxSbyTe alloys is achieved resulting from the convergence of three valence edges induced by Cr doping to enhance the power factor and superlattice precipitates to lower the thermal conductivity. Using finite element analysis simulations, we optimize the geometry of a segmented thermoelectric device made of the as-developed Ge1−x−yCrxSbyTe and other reported materials, leading to a record high efficiency. Furthermore, our simulations on over 70 existing n-type thermoelectric materials can serve as a library to bridge the gap between materials science and device engineering to achieve high-efficiency thermoelectric devices.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 26 Jan 2021 22:28
Last Modified: 22 Apr 2021 03:20
Uncontrolled Keywords: Device engineering; Environmental science; Geometry optimization; Science development; Thermo-Electric materials; Thermoelectric devices; Thermoelectric efficiency; Thermoelectric performance
Fields of Research (2008): 02 Physical Sciences > 0204 Condensed Matter Physics > 020404 Electronic and Magnetic Properties of Condensed Matter; Superconductivity
09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
51 PHYSICAL SCIENCES > 5104 Condensed matter physics > 510404 Electronic and magnetic properties of condensed matter; superconductivity
Funding Details:
Identification Number or DOI: https://doi.org/10.1039/D0EE01004A
URI: http://eprints.usq.edu.au/id/eprint/40552

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