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Applied Physics Letters / Volume 97 / Issue 5 / ELECTRONIC TRANSPORT AND SEMICONDUCTORS

Appl. Phys. Lett. 97, 052102 (2010); http://dx.doi.org/10.1063/1.3464288 (3 pages)

Enhanced thermoelectricity in composites by electronic structure modifications and nanostructuring

A. Popescu and L. M. Woods

Department of Physics, University of South Florida, Tampa, Florida 33620, USA

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(Received 30 May 2010; accepted 24 June 2010; published online 4 August 2010)

The thermoelectric performance of nanocomposites with locally distorted density of states is investigated. The analytical expressions we have derived allow us to explore the effects of localized states modeled as Lorentzians on the materials transport properties in terms of their sharpness and locations relative to the Fermi level. Further optimization of the transport through nanostructuring design is also explored. We show that composites with both locally distorted density of states and nanostructure integration open the possibility for significant enhancement of the thermoelectric performance at room temperature.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

electronic density of states, Fermi level, IV-VI semiconductors, lead compounds, localised states, nanocomposites, thermoelectricity

PACS

  • 72.20.Pa

    Thermoelectric and thermomagnetic effects

  • 73.63.Bd

    Nanocrystalline materials

  • 73.22.-f

    Electronic structure of nanoscale materials and related systems

  • 73.21.-b

    Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems

  • 73.20.At

    Surface states, band structure, electron density of states

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3464288

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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