Hong, M., Chen, Z.-G., Yang, L., Han, G. and Zou, J. (2015) Enhanced thermoelectric performance of ultrathin Bi2Se3 nanosheets through thickness control. Advanced Electronic Materials, 1(6), (doi: 10.1002/aelm.201500025)
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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(-1) K-1), and enhanced powder factor (4.71 x 10(-4) W m(-1) K-2 with a Seebeck coeffi cient of -155.32 mu V K-1 and an electrical conductivity of 1.96 x 10(4) 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.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Han, Dr Guang |
| Authors: | Hong, M., Chen, Z.-G., Yang, L., Han, G., and Zou, J. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Advanced Electronic Materials |
| Publisher: | WILEY-VCH Verlag GmbH & Co. KGaA |
| ISSN: | 2199-160X |
| ISSN (Online): | 2199-160X |
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