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journal article·2016-10Open access

High-temperature thermoelectric properties of the β-As2−xBixTe3 solid solution

J.-B. Vaney, G. Delaizir, A. Piarristeguy, J. Monnier, E. Alleno, E. B. Lopes, A. P. Gonçalves, A. Pradel, A. Dauscher, C. Candolfi, B. Lenoir

APL Materials· Volume 4· Issue 10
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Source abstract

Abstract

Bi2Te3-based compounds are a well-known class of outstanding thermoelectric materials. β-As2Te3, another member of this family, exhibits promising thermoelectric properties around 400 K when appropriately doped. Herein, we investigate the high-temperature thermoelectric properties of the β-As2−xBixTe3 solid solution. Powder X-ray diffraction and scanning electron microscopy experiments showed that a solid solution only exists up to x = 0.035. We found that substituting Bi for As has a beneficial influence on the thermopower, which, combined with extremely low thermal conductivity values, results in a maximum ZT value of 0.7 at 423 K for x = 0.017 perpendicular to the pressing direction.
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Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Topological Materials and Phenomena · Phase-change materials and chalcogenides

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

Affiliations

Institut Jean Lamour, UMR 7198 CNRS–Université de Lorraine, Nancy, France

Science des Procédés Céramiques et de Traitements de Surface (SPCTS), UMR CNRS 7315-Université de Limoges, Limoges, France

Institut Charles Gerhardt (ICG), UMR 5253 CNRS-Université de Montpellier, Montpellier, France

Institut de Chimie et des Matériaux Paris Est (ICMPE), UMR 7182 CNRS-Université Paris-Est Créteil, Thiais, France

C2TN, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal

Funding

Agence Nationale de la Recherche (ANR)

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