Sankhla, Aryan and Yasseri, Mohammad and Kamila, Hasbuna and Müller, Eckhard and de Boor, Johannes (2019) Experimental investigation of the predicted band structure modification of Mg2X (X: Si, Sn) thermoelectric materials due to scandium addition. Journal of Applied Physics. American Institute of Physics (AIP). DOI: 10.1063/1.5089720 ISSN 0021-8979
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Abstract
Modification of the electronic band structure via doping is an effective way to improve the thermoelectric properties of a material. Theoretical calculations from a previous study have predicted that Sc substitution on the Mg site in Mg2X materials drastically increase their Seebeck coefficient. Herein, we experimentally studied the influence of scandium substitution on the thermoelectric properties of Mg2Si0.4Sn0.6 and Mg2Sn. We found that the thermoelectric properties of these materials are unaffected by Sc addition, and we did not find hints for a modification of the electronic band structure. The SEM-energy dispersive X-ray analysis revealed that the scandium does not substitute Mg but forms a secondary phase (Sc-Si) in Mg2Si0.4Sn0.6 and remains inert in Mg2Sn, respectively. Thus, this study proves that scandium is an ineffective dopant for Mg2X materials.
Item URL in elib: | https://elib.dlr.de/130554/ | ||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||
Title: | Experimental investigation of the predicted band structure modification of Mg2X (X: Si, Sn) thermoelectric materials due to scandium addition | ||||||||||||||||||
Authors: |
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Date: | 11 June 2019 | ||||||||||||||||||
Journal or Publication Title: | Journal of Applied Physics | ||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||
DOI : | 10.1063/1.5089720 | ||||||||||||||||||
Publisher: | American Institute of Physics (AIP) | ||||||||||||||||||
ISSN: | 0021-8979 | ||||||||||||||||||
Status: | Published | ||||||||||||||||||
Keywords: | Ball milling; silicides; thermoelectric materials | ||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||
HGF - Program Themes: | Space Technology | ||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||
DLR - Program: | R SY - Technik für Raumfahrtsysteme | ||||||||||||||||||
DLR - Research theme (Project): | R - Systemtechnologien | ||||||||||||||||||
Location: | Köln-Porz | ||||||||||||||||||
Institutes and Institutions: | Institute of Materials Research > Thermoelectric Materials and Systems | ||||||||||||||||||
Deposited By: | Yasseri, Mohammad | ||||||||||||||||||
Deposited On: | 14 Nov 2019 17:39 | ||||||||||||||||||
Last Modified: | 11 Jun 2020 03:00 |
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