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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 46Heat Transport in Superlattices and Nanocomposites...

Heat Transport in Superlattices and Nanocomposites for Thermoelectric Applications

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Abstract:

Energy transport in nanostructures differs significantly from macrostructures because of classical and quantum size effects on energy carriers. Experimental results show that the thermal conductivity values of nanostructures such as superlattices are significantly lower than that of their bulk constituent materials. The reduction in thermal conductivity led to a large increase in the thermoelectric figure of merit in several superlattice systems. Materials with a large thermoelectric figure of merit can be used to develop efficient solid-state devices that convert waste heat into electricity. Superlattices grown by thin-film deposition techniques, however, are not suitable for large scale applications. Nanocomposites represent one approach that can lead to high thermoelectric figure merit. This paper reviews the current understanding of thermal conductivity reduction mechanisms in superlattices and presents theoretical studies on thermoelectric properties in semiconducting nanocomposites, aiming at developing high efficiency thermoelectric energy conversion materials.

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Periodical:

Advances in Science and Technology (Volume 46)

Pages:

104-110

DOI:

https://doi.org/10.4028/www.scientific.net/AST.46.104

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Cite this paper

Online since:

October 2006

Authors:

Gang Chen

Keywords:

Nanocomposite, Nanoscale Heat Transfer, Phonons, Superlattice, Thermal Conductivity (TC), Thermoelectrics

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