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Applied Physics Letters / Volume 97 / Issue 9 / ELECTRONIC TRANSPORT AND SEMICONDUCTORS

Appl. Phys. Lett. 97, 092118 (2010); http://dx.doi.org/10.1063/1.3485050 (3 pages)

Bi1−xSrxCuSeO oxyselenides as promising thermoelectric materials

L. D. Zhao1,2, D. Berardan1,2, Y. L. Pei3, C. Byl1,2, L. Pinsard-Gaudart1,2, and N. Dragoe1,2

1Institut de Chimie Moléculaire et des Matériaux d’Orsay, Univ. Paris-Sud, UMR 8182, Orsay F-91405, France
2CNRS, Orsay F-91405, France
3School of Materials Science and Engineering, Beihang University, Beijing 100191, People's Republic of China

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(Received 4 July 2010; accepted 11 August 2010; published online 3 September 2010)

p-type BiCuSeO, a layered oxyselenide composed of conductive (Cu2Se2)2− layers alternately stacked with insulating (Bi2O2)2+ layers, shows an enhancement of the electrical conductivity after substituting Bi3+ by Sr2+, from 470 S m−1 (BiCuSeO) to 4.8×104 S m−1 (Bi0.85Sr0.15CuSeO) at 293 K. Coupled to high Seebeck coefficients, this leads to promising values of the thermoelectric power factor that exceeds 500 μW m−1 K−2 at 873 K. Moreover, the thermal conductivity of these layered compounds is lower than 1 W m−1 K−1 at 873 K. Maximum ZT values reach 0.76 at 873 K, making this family promising for thermoelectric applications in the medium temperature range.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

bismuth compounds, copper compounds, electrical conductivity, Seebeck effect, strontium compounds, thermal conductivity, thermoelectric power

PACS

  • 72.20.Pa

    Thermoelectric and thermomagnetic effects

  • 66.70.-f

    Nonelectronic thermal conduction and heat-pulse propagation in solids; thermal waves

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3485050

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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