Journal
NANOSCALE
Volume 5, Issue 15, Pages 7017-7025Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr01499a
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Funding
- National Science Council of the Republic of China [NSC-100-2221-E-009-056, NSC-100-2622-E-009-009-CC2, NSC-101-2221-E-009-045-MY2]
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An innovative concept of twin-enhanced thermoelectricity was proposed to fundamentally resolve the high electrical resistance while not degrading the phonon scattering of the thermoelectric nanoassemblies. Under this frame, a variety of highly oriented and twinned bismuth antimony telluride (BixSb2-xTe3) nanocrystals were successfully fabricated by a large-area pulsed-laser deposition (PLD) technique on insulated silicon substrates at various deposition temperatures. The significant presence of the nonbasal- and basal-plane twins across the hexagonal BiSbTe nanocrystals, which were experimentally and systematically observed for the first time, evidently contributes to the unusually high electrical conductivity of similar to 2700 S cm(-1) and the power factor of similar to 25 mu W cm(-1) K-2 as well as the relatively low thermal conductivity of similar to 1.1 W m(-1) K-1 found in these nanostructured films.
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