Journal
APPLIED PHYSICS LETTERS
Volume 92, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2900960
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Nanocomposites with constituent sizes of < 50 nm are considered as a promising approach to enhance the figure of merit of bulk thermoelectric materials. A simple route involving hydrothermal synthesis and hot pressing was used in this work to prepare Bi2Te3/Sb2Te3 bulk nanocomposites. It is shown that the composites have a laminated structure composed of Bi2Te3 and Sb2Te3 nanolayers with the thickness varying alternately between 5 and 50 nm. The transport measurements indicate that the nanoscale laminated structure improves the thermoelectric performance with the maximal dimensionless figure of merit of 1.47 for the nanocomposite hot pressed from Bi2Te3 and Sb2Te3 nanopowders. (C) 2008 American Institute of Physics.
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