Journal
JOURNAL OF APPLIED PHYSICS
Volume 110, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3610385
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Funding
- National Science Foundation [NSF-CBET-0754029]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001054]
- U. S. Department of Energy, Office of Energy Efficiency and Renewable Energy
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0754029] Funding Source: National Science Foundation
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The compositional dependence of the crystal structure and lattice thermal conductivity in the Cu3SbSe4-Cu3SbS4 system has been studied. The lattice parameters of the Cu3SbSe4-xSx compounds decrease linearly with x, and the tetragonal structure (space group 1 (4) over bar 2m no. 121) of the end compounds is maintained at all compositions. The lattice thermal conductivity is much lower than that predicted by a simple rule of mixtures, which is typical for a solid solution. The Debye model produces a very reasonable fit to the experimental lattice thermal conductivity data when phonon scattering due to atomic mass and size differences between Se and S is taken into account. Compounds in this series are likely to improve upon the thermoelectric performance of Cu3SbSe4, which has shown ZT = 0.72 when optimized. (C) 2011 American Institute of Physics. [doi:10.1063/1.3610385]
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