Enhanced Thermoelectric Performance of SnTe-Based Materials via Interface Engineering
Article
Article Title | Enhanced Thermoelectric Performance of SnTe-Based Materials via Interface Engineering |
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ERA Journal ID | 40638 |
Article Category | Article |
Authors | Tian, Bang-Zhou, Chen, Jie, Jiang, Xu-Ping, Tang, Jun, Zhou, Da-Li, Sun, Qiang, Yang, Lei and Chen, Zhi-Gang |
Journal Title | ACS Applied Materials and Interfaces |
Journal Citation | 13 (42), pp. 50057-50064 |
Number of Pages | 8 |
Year | 2021 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 1944-8244 |
1944-8252 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsami.1c16053 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acsami.1c16053 |
Abstract | Interface engineering has been regarded as an effective strategy to improve thermoelectric (TE) performance by modulating electrical transport and enhancing phonon scattering. Herein, we develop a new interface engineering strategy in SnTe-based TE materials. We first use a one-step solvothermal method to synthesize SnTe powders decorated by Sb2Te3 nanoplates. After subsequent spark plasma sintering, we found that an ion-exchange reaction between the Sb2Te3 and SnTe matrixes happens to result in Sb doping and the formation of SnSb nanoparticles and the recrystallization of the nanograined SnTe at the grain boundaries of the SnTe matrix. Benefitting from this unique engineering, a significantly reduced lattice thermal conductivity of ∼0.64 W m-1 K-1 and a high zT of ∼1.08 (∼100% enhanced) at 873 K are achieved in SnTe-Sb0.06. Such improved TE properties are attributed to the optimized carrier concentration and valence band convergence due to the Sb doping and enhanced phonon scattering by interface engineering at the grain boundaries. This work has demonstrated a facile and effective method to realize high-TE-performance SnTe via interface engineering. |
Keywords | SnTe; thermoelectric; ion-exchange reaction; interface modification; phonon scattering |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 400402. Chemical and thermal processes in energy and combustion |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Sichuan University, China |
University of Queensland | |
Centre for Future Materials |
https://research.usq.edu.au/item/zq4w6/enhanced-thermoelectric-performance-of-snte-based-materials-via-interface-engineering
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