Realizing high thermoelectric properties of SnTe via synergistic band engineering and structure engineering
Article
Article Title | Realizing high thermoelectric properties of SnTe via synergistic band engineering and structure engineering |
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ERA Journal ID | 201288 |
Article Category | Article |
Authors | Moshwan, Raza (Author), Liu, Wei-Di (Author), Shi, Xiao-Lei (Author), Wang, Yun-Peng (Author), Zou, Jin (Author) and Chen, Zhi-Gang (Author) |
Journal Title | Nano Energy |
Journal Citation | 65, pp. 1-9 |
Number of Pages | 9 |
Year | 2019 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 2211-2855 |
2211-3282 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.nanoen.2019.104056 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S2211285519307633 |
Abstract | Lead-free tin telluride (SnTe) has been drawn enormous attention recently due to their potential applications in the mid-temperature thermoelectric power generation. In this study, we systematically investigated the thermoelectric properties of In/Sr co-doped SnTe via first principles density functional theory calculation, coupled with extensive structural characterizations and property measurements. From which, we found that the co-doping of In and Sr in SnTe can significantly improve the electrical transport properties through unique interplay of band structure modifications, and the reduced lattice thermal conductivity can be achieved via strong phonon scattering by point defects, nanoprecipitates, and grain boundaries. Consequently, a record high power factor of ~33.88 μWcm−1K−2 and a peak figure of merit of ~1.31 have been achieved at 823 K for the Sn0.925In0.025Sr0.05Te pellet. This study indicates that In/Sr co-doping can effectively make incorporation of resonant levels, band degeneracy, band gap tuning and nanostructuring, leading to the achieving high thermoelectric performance of SnTe material. |
Keywords | Thermoelectric; SnTe; In/Sr co-doping; Band engineering; Nanostructuring |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Central South University, China | |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
Funding source | Australian Research Council (ARC) Grant ID DP1901001781 |
https://research.usq.edu.au/item/q5717/realizing-high-thermoelectric-properties-of-snte-via-synergistic-band-engineering-and-structure-engineering
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