Thermoelectric behavior of Bi2Te2.55Se0.45 with a tunable seebeck coefficient: A comparison between coarse needle-like structure and bulk nanostructured alloys
| Author | El-Makaty, Farah M. |
| Author | Shakoor, R.A. |
| Author | Hammuda, Abdelmagid |
| Author | Youssef, Khaled M. |
| Available date | 2024-11-13T05:32:16Z |
| Publication Date | 2023 |
| Publication Name | Journal of Materials Research and Technology |
| Resource | Scopus |
| Identifier | http://dx.doi.org/10.1016/j.jmrt.2023.10.087 |
| ISSN | 22387854 |
| Abstract | In this study, we compare the thermoelectric properties of coarse-grained n-type Bi2Te2.55Se0.45 alloy prepared by induction melting with the bulk-nanostructured prepared by ball milling and hot-pressing techniques. The corresponding thermoelectric properties showed different behavior for each material processed using different routes. The most striking result of the study is observing a p-type behavior and charge carrier transition from p-to n-type for the coarse-grained alloy. These observed phenomena are related mainly to the unique needle-like microstructure accompanied by high lattice strain. Lastly, the obtained figure-of-merit values for the coarse needle-like structure and bulk nanostructured Bi2Te2.55Se0.45 alloys are 0.20 and 0.80 at their optimum temperatures of 60 and 120 °C, respectively. |
| Sponsor | This work was supported by Grant no. GSRA8-L-1-0414-21013 and NPRP10-0206-170366 from Qatar National Research Fund (a member of the Qatar Foundation ). The statements made herein are solely the responsibility of the authors. The authors acknowledge the technical support from the Central Laboratory Unit (CLU), the Center of Advanced Materials (CAM), and the Chemistry Department at Qatar University. |
| Language | en |
| Publisher | Elsevier |
| Subject | Bismuth telluride Induction melting Mechanical milling Seebeck coefficient Thermoelectric |
| Type | Article |
| Pagination | 1958-1967 |
| Volume Number | 27 |
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