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

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 varie...

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Main Authors:	Paulina Komar, Emigdio Chávez-Ángel, Christoph Euler, Benjamin Balke, Ute Kolb, Mathis M. Müller, Hans-Joachim Kleebe, Gerhard H. Fecher, Gerhard Jakob
Format:	Article
Language:	English
Published:	AIP Publishing LLC 2016-10-01
Series:	APL Materials
Online Access:	http://dx.doi.org/10.1063/1.4954499

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spelling	doaj-523956ddde2045aa8f3d15cb4e8d9ea42020-11-24T21:14:27ZengAIP Publishing LLCAPL Materials2166-532X2016-10-01410104902104902-710.1063/1.4954499010695APMTailoring of the electrical and thermal properties using ultra-short period non-symmetric superlatticesPaulina Komar0Emigdio Chávez-Ángel1Christoph Euler2Benjamin Balke3Ute Kolb4Mathis M. Müller5Hans-Joachim Kleebe6Gerhard H. Fecher7Gerhard Jakob8Institute of Physics, University of Mainz, Staudinger Weg 7, 55128 Mainz, GermanyInstitute of Physics, University of Mainz, Staudinger Weg 7, 55128 Mainz, GermanyInstitute of Physics, University of Mainz, Staudinger Weg 7, 55128 Mainz, GermanyInstitute of Inorganic and Analytical Chemistry, University of Mainz, Duesbergweg 10-14, 55128 Mainz, GermanyInstitute for Physical Chemistry, University of Mainz, Welderweg 11, 55099 Mainz, GermanyInstitute of Applied Geosciences, TU Darmstadt, Schnittspahnstraße 9, 64287 Darmstadt, GermanyInstitute of Applied Geosciences, TU Darmstadt, Schnittspahnstraße 9, 64287 Darmstadt, GermanyMax-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, GermanyInstitute of Physics, University of Mainz, Staudinger Weg 7, 55128 Mainz, GermanyThermoelectric 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.http://dx.doi.org/10.1063/1.4954499
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Paulina Komar Emigdio Chávez-Ángel Christoph Euler Benjamin Balke Ute Kolb Mathis M. Müller Hans-Joachim Kleebe Gerhard H. Fecher Gerhard Jakob
spellingShingle	Paulina Komar Emigdio Chávez-Ángel Christoph Euler Benjamin Balke Ute Kolb Mathis M. Müller Hans-Joachim Kleebe Gerhard H. Fecher Gerhard Jakob Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices APL Materials
author_facet	Paulina Komar Emigdio Chávez-Ángel Christoph Euler Benjamin Balke Ute Kolb Mathis M. Müller Hans-Joachim Kleebe Gerhard H. Fecher Gerhard Jakob
author_sort	Paulina Komar
title	Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices
title_short	Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices
title_full	Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices
title_fullStr	Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices
title_full_unstemmed	Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices
title_sort	tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices
publisher	AIP Publishing LLC
series	APL Materials
issn	2166-532X
publishDate	2016-10-01
description	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.
url	http://dx.doi.org/10.1063/1.4954499
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Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices

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