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Improved thermoelectric characteristics of Si-doped misfit-layered cobaltite
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SYSNO ASEP 0366985 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Improved thermoelectric characteristics of Si-doped misfit-layered cobaltite Author(s) Liu, Ch.-J. (TW)
Huang, Y.-Ch. (TW)
Nong, N.V. (TW)
Liu, Y.-L. (TW)
Petříček, Václav (FZU-D) RID, ORCID, SAISource Title Journal of Electronic Materials. - : Springer - ISSN 0361-5235
Roč. 40, č. 5 (2011), 1042-1045Number of pages 4 s. Language eng - English Country US - United States Keywords thermoelectrics ; cobaltite ; power factor Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000289901700104 DOI 10.1007/s11664-011-1527-y Annotation The cobaltite Ca3Co4O9+δ has shown large thermopower and is considered to be a good candidate for use as a thermoelectric material. In this paper, we report measurements of the electrical resistivity and Seebeck coefficient for a series of misfit-layered oxides Ca3Co4-xSixO9+δ prepared by solid-state reaction. Structural parameters are refined with the superspace group X2/m(0b0)s0 using powder x-ray diffraction data. With partial substitution of Si4+ for Co3+, the resistivity decreases, while the thermopower increases simultaneously. These results indicate that partial substitution of Si4+ improves the thermoelectric characteristics of Ca3Co4O9+δ. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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