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Thermoelectric and mechanical properties of Ag and Cu doped (GeTe)0.96(Bi2Te3)0.04

Published online by Cambridge University Press:  08 August 2018

Gilad M. Guttmann ,
Reuven Gertner ,
Shmuel Samuha ,
Dana Ben-Ayoun ,
Shlomo Haroush  and
Yaniv Gelbstein
Gilad M. Guttmann
Affiliation:
Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel Nuclear Research Center Negev, POB 9001, Beer-Sheva, Israel
Reuven Gertner
Affiliation:
Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel Nuclear Research Center Negev, POB 9001, Beer-Sheva, Israel
Shmuel Samuha
Affiliation:
Nuclear Research Center Negev, POB 9001, Beer-Sheva, Israel
Dana Ben-Ayoun
Affiliation:
Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
Shlomo Haroush
Affiliation:
Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel Nuclear Research Center Negev, POB 9001, Beer-Sheva, Israel
Yaniv Gelbstein*
Affiliation:
Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
*
Address all correspondence to Yaniv Gelbstein at yanivge@bgu.ac.il
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Abstract

Thermoelectric (TE) is a heat-to-electricity energy conversion method with increasing attention. In recent years, novel highly efficient TE materials, including GeTe and other IV–VI based alloys, were reported, mainly due to either electronic optimization of transport properties or nanostructuring for minimization of the lattice thermal conductivity. Yet, the mechanical properties of such materials (with brittle nature), which are significant for obtaining the required durability under the associated thermo-mechanical conditions of practical applications, were much less tackled. The challenge is combining the both, upon introducing alloying elements, positively contributing both the TE figure of merit and the mechanical durability. In the current research, the TE and mechanical (mainly compression and fracture toughness) effects of Ag- and Cu-doping of the GeTe-rich (GeTe)0.96(Bi2Te3)0.04 alloy were investigated, suggesting improvement on both aspects.

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Type
Research Letters
Information
MRS Communications , Volume 8 , Issue 3 , September 2018 , pp. 1292 - 1299
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Copyright
Copyright © Materials Research Society 2018 

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Footnotes

*

These authors equally contributed to the research.

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