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M.G. Kanatzidis (2001)
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T.E. Svechnikova, N.M. Maksimova, N.V. Polikarpova, P.P. Konstantinov (1998)
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The effect of Cu doping (0.05–0.20 at. %) on the thermoelectric and transport properties of the layered compound GeBi4Te7 (with a small Ge deficiency) was studied. According to x-ray diffraction data obtained on cleaved (001) surfaces, Cu doping increases the c cell parameter, presumably because some of the Cu atoms are incorporated in the van der Waals gaps between the five- and seven-layer slabs. In addition, Cu doping reduces lattice thermal conductivity and increases electron mobility. The thermoelectric figure of merit of the material with the optimum Cu content (0.05 at. %) is ZT = 0.65 around 330 K.
Inorganic Materials – Springer Journals
Published: Sep 29, 2004
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