Highly (00l)-oriented Bi2Te3/Te heterostructure thin films with enhanced power factor
Article
Article Title | Highly (00l)-oriented Bi2Te3/Te heterostructure thin films with enhanced power factor |
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ERA Journal ID | 41997 |
Article Category | Article |
Authors | Shang, Hong-Jing (Author), Ding, Fa-Zhu (Author), Deng, Yuan (Author), Zhang, He (Author), Dong, Ze-Bin (Author), Xu, Wen-Juan (Author), Huang, Da-Xing (Author), Gu, Hong-Wei (Author) and Chen, Zhi-Gang (Author) |
Journal Title | Nanoscale |
Journal Citation | 10 (43), pp. 20189-20195 |
Number of Pages | 7 |
Year | 2018 |
Publisher | The Royal Society of Chemistry |
Place of Publication | Cambridge, United Kingdom |
ISSN | 2040-3364 |
2040-3372 | |
Digital Object Identifier (DOI) | https://doi.org/10.1039/c8nr07112h |
Web Address (URL) | https://pubs.rsc.org/en/Content/ArticleLanding/2018/NR/C8NR07112H#!divAbstract |
Abstract | Introducing nanoscale heterostructure interfaces into material matrix is an effective strategy to optimize the thermoelectric performance by energy-dependent carrier filtering effect. In this study, highly (00l)-oriented Bi2Te3/Te heterostructure thin films have been fabricated on single-crystal MgO substrates using a facile magnetron co-sputtering method. Bi2Te3/Te heterostructure thin films with Te contents of 63.8 at% show an optimized thermoelectric performance, which possess a Seebeck coefficient of -157.7 μV K-1 and an electrical conductivity of 9.72 × 104 S m-1, leading to a high power factor approaching 25 μW cm-1 K-2. The partially decoupled behavior of the Seebeck coefficient and electrical conductivity is contributed to Bi2Te3/Te heterostructure interfaces, which causes interfacial barrier filtering and scattering effects; thus, a high level of the Seebeck coefficient is obtained. Meanwhile, carrier transport in a-b plane can benefit from the highly preferred orientation, which guarantees a remarkably high electrical conductivity. We anticipate that our strategy may guide the way for preparing high-performance thermoelectric materials by microstructure design and regulation. |
Keywords | thermoelectricity; thermoelectric equipment; antimony telluride |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Chinese Academy of Sciences, China |
Beihang University, China | |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
Funding source | Australian Research Council (ARC) |
https://research.usq.edu.au/item/q526z/highly-00l-oriented-bi2te3-te-heterostructure-thin-films-with-enhanced-power-factor
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