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Title First Principle Study and Optimal Doping for High Thermoelectric Performance of TaXSn Materials (X = Co, Ir and Rh)
Authors Khaldi, A.
Benallou, Y.
Zemouli, M.
Amara, K.
El Keurti, M.
ORCID
Keywords semiconductors
thermoelectric performances
GGA-PBEsol
p-type and n-type doping levels
thermopower factors
doping level
Type Article
Date of Issue 2021
URI https://essuir.sumdu.edu.ua/handle/123456789/82585
Publisher Sumy State University
License In Copyright
Citation A. Khaldi, Y. Benallou, et al., J. Nano- Electron. Phys. 13 No 1, 01011 (2021). DOI: https://doi.org/10.21272/jnep.13(1).01011
Abstract In this paper, the full potential linearized augmented plane wave method implemented in the WIEN2K code with first principles-based density functional theory are used to investigate the structural, elastic, electronic and thermoelectric properties of TaCoSn, TaIrSn and TaRhSn. The structural and elastic constants are calculated using the generalized gradient potential developed by Perdew-Burke-Ernzerhof (GGA-PBEsol). The electronic structures are performed by means of GGA-PBEsol and improved by TranBlaha modified Becke-Johnson (TB-mBJ) potential. Our results show that the studied compounds are semiconductors with indirect gaps. On the other hand, we investigated the thermoelectric properties at different temperatures with respect to the chemical potential. The results show that the thermopower factors are more important for p-type doping than those for n-type doping and the maximum value of these factors indicates the optimal hole-doping level which gives rise to high thermoelectric performances of these materials. Finally, we note that the best thermopower values are found for the TaRhSn compound with optimal doping levels of (75.76, 175.60 and 238.92) x 1014 µW cm – 1 K – 2 s – 1 at temperatures of 300, 600, and 900 K, respectively.
Appears in Collections: Журнал нано- та електронної фізики (Journal of nano- and electronic physics)

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Algeria Algeria
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China China
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France France
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-829823453
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Ireland Ireland
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Japan Japan
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Lithuania Lithuania
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