DataVXACS Applied Energy MaterialsPaper
journal article·2020-05-26Open access

Toppling the Transport Properties with Cationic Overstoichiometry in Thermoelectric Colusite: [Cu26Cr2Ge6]1+δS32

Gabin Guélou, Ventrapati Pavan Kumar, Abdelhamid Bourhim, Pierric Lemoine, Bernard Raveau, Andrew Supka, Oleg I. Lebedev, Rabih Al Rahal Al Orabi, Marco Fornari, Koichiro Suekuni, Emmanuel Guilmeau

ACS Applied Energy Materials· Volume 3· Issue 5
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Source abstract

Abstract

The excellent thermoelectric properties of colusite are known to be closely related to the nature of the cations at the core of the tetrahedral–octahedral complexes. Here, we demonstrate that cation overstoichiometry decreases the carrier concentration and also generates structural disorder, which modify the conduction mechanism in a way that resembles the effect of cation-size mismatch. This functionalization of the “Cu26S32” conductive network leads to a high figure of merit of 1.0 at 700 K. This study highlights the importance of the cationic arrangement and furthers our understanding on the fascinating transport properties in colusite.
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Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CRISMAT, CNRS, Normandie Université, ENSICAEN, UNICAEN, 14000 Caen, France

Université de Rennes 1, CNRS, ISCR-UMR 6226, F-35000 Rennes, France

Department of Physics and Science of Advanced Materials Program, Central Michigan University, Mt. Pleasant, Michigan 48859, United States

Design and Development of Functional Materials Department, Solvay, Axel’One, 87 avenue des Frères Perret, 69192 Saint Fons Cedex, France

Department of Applied Science for Electronics and Materials, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

Funding

Agence Nationale de la Recherche

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