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Synthesis, structural characterisation and thermoelectric properties of Bi1−xPbxOCuSe

Luu, S. D. N. and Vaqueiro, P. (2013) Synthesis, structural characterisation and thermoelectric properties of Bi1−xPbxOCuSe. Journal of Materials Chemistry A, 1 (39). pp. 12270-12275. ISSN 0959-9428

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To link to this item DOI: 10.1039/C3TA12753B

Abstract/Summary

The effect of Pb2+ doping on the structure and thermoelectric properties of BiOCuSe (also known as BiCuSeO or BiCuOSe) is described. With increasing Pb2+ content, the expansion of the unit cell results in a weakening of the bonding between the [Bi2(1-x) Pb2xO2]2(1-x)+ and the [Cu2Se2]2(1-x)- layers. The electrical resistivity and Seebeck coefficient decrease in a systematic way with growing Pb2+ levels. The thermal conductivity rises due to the increase of the electronic contribution with doping. The power factor of materials with a 4-5% Pb2+ content takes values of ca. 8 W cm-1 K-2 over a wide temperature range. ZT at 673 K is enhanced by ca. 50% when compared to values found for other dopants, such as Sr2+ or Mg2+.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:34764
Uncontrolled Keywords:thermoelectric materials; oxyselenide
Publisher:Royal Society of Chemistry

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