Enhanced thermoelectric performance of ultrathin Bi2Se3 nanosheets through thickness control
Article
Article Title | Enhanced thermoelectric performance of ultrathin Bi2Se3 nanosheets through thickness control |
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ERA Journal ID | 210042 |
Article Category | Article |
Authors | Hong, Min (Author), Chen, Zhi-Gang (Author), Yang, Lei (Author), Han, Guang (Author) and Zou, Jin (Author) |
Journal Title | Advanced Electronic Materials |
Journal Citation | 1 (6) |
Number of Pages | 9 |
Year | 2015 |
Place of Publication | Germany |
ISSN | 2199-160X |
Digital Object Identifier (DOI) | https://doi.org/10.1002/aelm.201500025 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1002/aelm.201500025/abstract |
Abstract | Large-scale Bi2Se3 nanosheets with controllable thickness have been synthesized by a microwave-assisted solvothermal method. Through detailed structural characterizations, high-quality Bi2Se3 nanosheets with average thickness of 1, 4, 7, and 13 nm have been fabricated. Their thermoelectric performance has been detailed investigated by experiments and fundamental nonparabolic Kane models. A significantly reduced thermal conductivity (only 0.41 W m-1K-1), and enhanced powder factor (4.71 × 10-4 W m-1K-2 with a Seebeck coefficient of –155.32 μV K-1 and an electrical conductivity of 1.96 × 104 S m-1) are observed in the pellet composed of single-layered Bi2Se3 nanosheets. Such an enhanced thermoelectric performance is ascribed to the broadened bandgap and optimized Fermi level in ultrathin Bi2Se3 nanosheets. |
Keywords | band structures; Bi2Se3 nanosheets; Kane band models; thermoelectric; thickness controls |
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 |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q415x/enhanced-thermoelectric-performance-of-ultrathin-bi2se3-nanosheets-through-thickness-control
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