Super large Sn1−xSe single crystals with excellent thermoelectric performance
Article
Article Title | Super large Sn1−xSe single crystals with excellent thermoelectric performance |
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ERA Journal ID | 40638 |
Article Category | Article |
Authors | Jin, Min (Author), Shi, Xiao-Lei (Author), Feng, Tianli (Author), Liu, Weidi (Author), Feng, Haifeng (Author), Pantelides, Sokrates T. (Author), Jiang, Jun (Author), Chen, Yunxia (Author), Du, Yi (Author), Zou, Jin (Author) and Chen, Zhi-Gang (Author) |
Journal Title | ACS Applied Materials and Interfaces |
Journal Citation | 11, pp. 8051-8059 |
Number of Pages | 9 |
Year | 2019 |
Publisher | American Chemical Society |
Place of Publication | Washington, United States |
ISSN | 1944-8244 |
1944-8252 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsami.8b21699 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acsami.8b21699 |
Abstract | SnSe single crystals have drawn extensive attention for their ultralow thermal conductivity and outstanding thermoelectric performance. Here, we report super large Sn1−xSe single crystals with excellent thermoelectric properties, fabricated via an advanced horizontal Bridgman technique with great yield and high reproducibility. The obtained single crystals have a super large size of ∼70 × 50 × 15 mm with a considerable weight of 148 g, which leads to a record-high mass density of >6.1 g cm−3. Extensive chemical characterization demonstrates that ∼0.3% Sn vacancies are present, which results in a large concentration of holes, ∼1.2 × 1019 cm−3, and an enhanced power factor of ∼6.1 μW cm−1 K−2 at 793 K. Simultaneously, the Sn-vacancy-induced lattice distortions result in a low thermal conductivity of ∼0.39 W m−1 K−1 at 793 K, leading to a competitive ZT of ∼1.24. This work demonstrates that large-size off-stoichiometric SnSe single crystals hold promise to achieve high thermoelectric performance. |
Keywords | thermoelectric, tin selenide, single crystal, characterizations, first-principles calculations |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Public Notes | © 2019 American Chemical Society. |
Byline Affiliations | Shanghai Dianji University, China |
University of Queensland | |
Vanderbilt University, United States | |
University of Wollongong | |
Chinese Academy of Sciences, China | |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q594z/super-large-sn1-xse-single-crystals-with-excellent-thermoelectric-performance
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