Issue 17, 2024

Thermoelectric properties of Bi1−xPbxCu1−xSeO oxyselenides

Abstract

In this work, Bi1−xPbxCu1−x SeO (x = 0, 0.02, 0.06, and 0.08) compounds were synthesized by a solid state reaction followed by spark plasma sintering. The effect of simultaneous Bi to Pb substitution and Cu vacancy introduction on thermoelectric properties was investigated systematically. The power factor was significantly enhanced, contributing to the increase in the zT value. As a result, the zTmax of 0.75 at 773 K was obtained for the Bi0.94Pb0.06Cu0.94SeO sample. To reveal the factors constraining the zTmax of Bi1−xPbxCuSeO-based oxyselenides, a further careful analysis of literature data was performed. We highlighted that for Pb-doped oxyselenides, the power factor is almost independent of the synthesis technique, while the lattice thermal conductivity is the main property determining zTmax and is highly affected by the synthesis method.

Graphical abstract: Thermoelectric properties of Bi1−xPbxCu1−xSeO oxyselenides

Supplementary files

Article information

Article type
Paper
Submitted
23 jan 2024
Accepted
10 apr 2024
First published
22 apr 2024

Phys. Chem. Chem. Phys., 2024,26, 13006-13011

Thermoelectric properties of Bi1−xPbxCu1−xSeO oxyselenides

A. Khanina, A. Novitskii, D. Pashkova, A. Voronin, T. Mori and V. Khovaylo, Phys. Chem. Chem. Phys., 2024, 26, 13006 DOI: 10.1039/D4CP00308J

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