The thermoelectric properties of In-filled and Fe-doped CoSb3 (In z Co4−x - Fe x Sb12) skutterudites prepared by encapsulated induction melting were examined. A single δ-phase was obtained successfully by subsequent annealing at 823 K for 120 h. The Hall and Seebeck coefficients of the In z Co4−x Fe x Sb12 samples had positive signs, indicating p-type conduction. The electrical conductivity was increased by Fe doping, and the thermal conductivity was decreased by In filling due to phonon scattering. The thermoelectric properties were improved by In filling and Fe doping, and were closely related to the optimum carrier concentration and phonon scattering.
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This study was supported by the R&D Program for Energy and Resource Technology and by the Regional Innovation Center (RIC) Program funded by the Ministry of Knowledge Economy of the Korean Government.
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Park, KH., Jung, JY., Ur, SC. et al. Synthesis and Thermoelectric Properties of In z Co4−x Fe x Sb12 Skutterudites. J. Electron. Mater. 39, 1750–1754 (2010). https://doi.org/10.1007/s11664-010-1188-2
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DOI: https://doi.org/10.1007/s11664-010-1188-2