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Pb-for-Bi substitution for enhancing thermoelectric characteristics of [(Bi,Pb)2Ba2O4±w]0.5CoO2
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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Applied Physics Letters, Volume 88, issue 23, pp. 1-3
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We report strongly enhanced thermoelectric characteristics for a misfit-layered oxide, [Bi2Ba2O4±ω]0.5CoO2, in a wide temperature range, as achieved through substituting up to 20% of Bi by Pb. The Pb substitution kept the thermal conductivity (κ) unchanged but decreased the electrical resistivity (ρ) and increased the Seebeck coefficient (S) simultaneously, such that a three-fold enhancement in the thermoelectric figure of merit, Z (≡S2/ρκ), was realized. At the same time x-ray absorption near-edge structure data indicated that the valence and spin states of Co are not affected by the Pb-for-Bi substitution.
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Sakai, K, Karppinen, M, Chen, J M, Liu, R, Sugihara, S & Yamauchi, H 2006, 'Pb-for-Bi substitution for enhancing thermoelectric characteristics of [(Bi,Pb)2Ba2O4±w]0.5CoO2', Applied Physics Letters, vol. 88, no. 23, 232102, pp. 1-3. https://doi.org/10.1063/1.2206134