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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.

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• In Copyright
  

Keyword: thermoelectric

Date published: 2024-04-22

Publisher: Royal Society of Chemistry (RSC)

Journal:

• Physical Chemistry Chemical Physics (ISSN: 14639084) vol. 26 issue. 17 p. 13006-13011

Funding:

• Japan Science and Technology Agency JPMJMI19A1
• Russian Science Foundation 19-79-10282

Manuscript type: Author's original (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4811

First published URL: https://doi.org/10.1039/d4cp00308j

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Updated at: 2024-10-09 08:30:23 +0900

Published on MDR: 2024-10-09 08:30:24 +0900