Local structural distortions and reduced thermal conductivity in Ge-substituted chalcopyrite-Reference-Cited by-同舟云学术

Local structural distortions and reduced thermal conductivity in Ge-substituted chalcopyrite

Published:2022 Issue:44 Volume:10 Page:23874-23885
ISSN:2050-7488
Container-title:Journal of Materials Chemistry A
language:en
Short-container-title:J. Mater. Chem. A

Author:

Tippireddy Sahil¹^ORCID,Azough Feridoon²,Vikram ¹,Bhui Animesh³,Chater Philip⁴^ORCID,Kepaptsoglou Demie⁵⁶^ORCID,Ramasse Quentin⁵⁷,Freer Robert²^ORCID,Grau-Crespo Ricardo¹^ORCID,Biswas Kanishka³^ORCID,Vaqueiro Paz¹^ORCID,Powell Anthony V.¹^ORCID

Affiliation:

1. Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6DX, UK

2. Department of Materials, University of Manchester, Manchester, M13 9PL, UK

3. New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064, India

4. Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK

5. SuperSTEM Laboratory, SciTech Daresbury Campus, Daresbury WA4 4AD, UK

6. Department of Physics, University of York, York YO10 5DD, UK

7. School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK

Abstract

Pair-distribution-function analysis of X-ray total-scattering data for CuFe1−xGexS2 reveals a local structural distortion induced by the lone-pair of Ge2+. The resulting strain reduces thermal conductivity and improves thermoelectric performance.

Funder

Engineering and Physical Sciences Research Council

UK Research and Innovation

Publisher

Royal Society of Chemistry (RSC)

Subject

General Materials Science,Renewable Energy, Sustainability and the Environment,General Chemistry

Link

http://pubs.rsc.org/en/content/articlepdf/2022/TA/D2TA06443J

Reference59 articles.

1. All-scale hierarchical thermoelectrics: MgTe in PbTe facilitates valence band convergence and suppresses bipolar thermal transport for high performance

2. Lattice Strain Advances Thermoelectrics