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Phonon Scattering through a Local Anisotropic Structural Disorder in the Thermoelectric Solid Solution Cu_2Zn_(1−x)Fe_xGeSe_4

Zeier, Wolfgang G. and Pei, Yanzhong and Pomrehn, Gregory and Day, Tristan and Heinz, Nicholas and Heinrich, Christophe P. and Snyder, G. Jeffrey and Tremel, Wolfgang (2013) Phonon Scattering through a Local Anisotropic Structural Disorder in the Thermoelectric Solid Solution Cu_2Zn_(1−x)Fe_xGeSe_4. Journal of the American Chemical Society, 135 (2). pp. 726-732. ISSN 0002-7863. http://resolver.caltech.edu/CaltechAUTHORS:20130226-095225287

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Abstract

Inspired by the promising thermoelectric properties of chalcopyrite-like quaternary chalcogenides, here we describe the synthesis and characterization of the solid solution Cu_2Zn_(1–x)Fe_xGeSe_4. Upon substitution of Zn with the isoelectronic Fe, no charge carriers are introduced in these intrinsic semiconductors. However, a change in lattice parameters, expressed in an elongation of the c/a lattice parameter ratio with minimal change in unit cell volume, reveals the existence of a three-stage cation restructuring process of Cu, Zn, and Fe. The resulting local anisotropic structural disorder leads to phonon scattering not normally observed, resulting in an effective approach to reduce the lattice thermal conductivity in this class of materials.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/ja308627vDOIUNSPECIFIED
http://pubs.acs.org/doi/full/10.1021/ja308627vPublisherUNSPECIFIED
ORCID:
AuthorORCID
Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2012 American Chemical Society. Received: August 30, 2012. Published: December 20, 2012. Financial support through the Excellence Initiative (DFG/GSC 266) is acknowledged by W.G.Z. and C.P.H. W.G.Z. furthermore thanks the Carl-Zeiss foundation for financial support. We also acknowledge Vadim Ksenofontov for performing Mössbauer spectroscopy. The authors declare no competing financial interest.
Funders:
Funding AgencyGrant Number
Carl-Zeiss FoundationUNSPECIFIED
Excellence InitiativeDFG/GSC 266
Record Number:CaltechAUTHORS:20130226-095225287
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130226-095225287
Official Citation:Phonon Scattering through a Local Anisotropic Structural Disorder in the Thermoelectric Solid Solution Cu2Zn1–xFexGeSe4 Wolfgang G. Zeier, Yanzhong Pei, Gregory Pomrehn, Tristan Day, Nicholas Heinz, Christophe P. Heinrich, G. Jeffrey Snyder, and Wolfgang Tremel Journal of the American Chemical Society 2013 135 (2), 726-732
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37138
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Feb 2013 19:00
Last Modified:18 Nov 2016 17:58

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