Synthesis of n-type SnSe polycrystals with high and isotropic thermoelectric performance
SCIE
SCOPUS
- Title
- Synthesis of n-type SnSe polycrystals with high and isotropic thermoelectric performance
- Authors
- Viet Chien, Nguyen; Min Park, Hyun; Shin, Hosun; Yong Song, Jae
- Date Issued
- 2023-03
- Publisher
- Elsevier BV
- Abstract
- p-type SnSe has the ultrahigh thermoelectric ZT over 2 at 773 K, as single crystal with a significantly anisotropic structure or polycrystals. In this study, a facile route of synthesizing n-type polycrystalline SnSe, which has high and isotropic thermoelectric performance, is proposed using simple ball milling, pre-annealing and spark plasma sintering processes, in sequence. The pre-annealing process effectively changes the major carrier from hole to electron and increases the crystallinity and grain size of the SnSe powder. The addition of SnCl2 as a dopant enables the electron concentration to be controlled in the range of 1.3 × 1016 cm−3 to 1.7 × 1018 cm−3 at 300 K. As a result, a remarkable ZT of 0.84–0.86 at 773 K was achieved for n-type polycrystalline SnSe0.92 with 4 wt% SnCl2, regardless of the sintering direction. © 2022
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/118115
- DOI
- 10.1016/j.jallcom.2022.168043
- ISSN
- 0925-8388
- Article Type
- Article
- Citation
- Journal of Alloys and Compounds, vol. 937, page. 168043, 2023-03
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- There are no files associated with this item.
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