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Materials 2017, 10(4), 418; doi:10.3390/ma10040418

Thermoelectric Transport in Nanocomposites

1
Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
2
Department of Mechanical Engineering, University of Colorado, Boulder, CO 80309, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Jordi Sort
Received: 23 November 2016 / Revised: 13 March 2017 / Accepted: 12 April 2017 / Published: 15 April 2017
(This article belongs to the Special Issue Advances in Thermoelectric Materials)

Abstract

Thermoelectric materials which can convert energies directly between heat and electricity are used for solid state cooling and power generation. There is a big challenge to improve the efficiency of energy conversion which can be characterized by the figure of merit (ZT). In the past two decades, the introduction of nanostructures into bulk materials was believed to possibly enhance ZT. Nanocomposites is one kind of nanostructured material system which includes nanoconstituents in a matrix material or is a mixture of different nanoconstituents. Recently, nanocomposites have been theoretically proposed and experimentally synthesized to be high efficiency thermoelectric materials by reducing the lattice thermal conductivity due to phonon-interface scattering and enhancing the electronic performance due to manipulation of electron scattering and band structures. In this review, we summarize the latest progress in both theoretical and experimental works in the field of nanocomposite thermoelectric materials. In particular, we present various models of both phonon transport and electron transport in various nanocomposites established in the last few years. The phonon-interface scattering, low-energy electrical carrier filtering effect, and miniband formation, etc., in nanocomposites are discussed. View Full-Text
Keywords: nanocomposites; thermoelectric materials; transport nanocomposites; thermoelectric materials; transport
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, B.; Hu, J.; Zhou, J.; Yang, R. Thermoelectric Transport in Nanocomposites. Materials 2017, 10, 418.

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