Computer-aided design of high-efficiency GeTe-based thermoelectric devices
Article
Article Title | Computer-aided design of high-efficiency GeTe-based thermoelectric devices |
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ERA Journal ID | 40780 |
Article Category | Article |
Authors | Hong, Min (Author), Zheng, Kun (Author), Lyv, Wanyu (Author), Li, Meng (Author), Qu, Xianlin (Author), Sun, Qiang (Author), Xu, Shengduo (Author), Zou, Jin (Author) and Chen, Zhi-Gang (Author) |
Journal Title | Energy and Environmental Science |
Journal Citation | 13 (6), pp. 1856-1864 |
Number of Pages | 9 |
Year | 2020 |
Publisher | The Royal Society of Chemistry |
Place of Publication | United Kingdom |
ISSN | 1754-5692 |
1754-5706 | |
Digital Object Identifier (DOI) | https://doi.org/10.1039/D0EE01004A |
Web Address (URL) | https://pubs.rsc.org/en/content/articlelanding/2020/EE/D0EE01004A |
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. |
Keywords | Device engineering; Environmental science; Geometry optimization; Science development; Thermo-Electric materials; Thermoelectric devices; Thermoelectric efficiency; Thermoelectric performance |
ANZSRC Field of Research 2020 | 401605. Functional materials |
510404. Electronic and magnetic properties of condensed matter; superconductivity | |
Byline Affiliations | Centre for Future Materials |
Beijing University of Technology, China | |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
Funding source | Australian Research Council (ARC) |
https://research.usq.edu.au/item/q6106/computer-aided-design-of-high-efficiency-gete-based-thermoelectric-devices
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