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Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices

Komar, Paulina ; Chávez-Ángel, Emigdio ; Euler, Christoph ; Balke, Benjamin ; Kolb, Ute ; Müller, Mathis M. ; Kleebe, Hans-Joachim ; Fecher, Gerhard H. ; Jakob, Gerhard (2022):
Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices. (Publisher's Version)
In: APL Materials, 4 (10), AIP Publishing, e-ISSN 2166-532X,
DOI: 10.26083/tuprints-00020478,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices
Language: English
Abstract:

Thermoelectric modules based on half-Heusler compounds offer a cheap and clean way to create eco-friendly electrical energy from waste heat. Here we study the impact of the period composition on the electrical and thermal properties in non-symmetric superlattices, where the ratio of components varies according to (TiNiSn)ₙ:(HfNiSn)₆₋ₙ, and 0 ⩽ n ⩽ 6 unit cells. The thermal conductivity (κ) showed a strong dependence on the material content achieving a minimum value for n = 3, whereas the highest value of the figure of merit ZT was achieved for n = 4. The measured κ can be well modeled using non-symmetric strain relaxation applied to the model of the series of thermal resistances.

Journal or Publication Title: APL Materials
Volume of the journal: 4
Issue Number: 10
Publisher: AIP Publishing
Collation: 7 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
Date Deposited: 09 Feb 2022 13:40
Last Modified: 09 Feb 2022 13:40
DOI: 10.26083/tuprints-00020478
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-204786
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20478
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