Surface-Decorated Silicon Nanowires: A Route to High-ZT Thermoelectrics

Publication: Research - peer-reviewJournal article – Annual report year: 2009

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Based on atomistic calculations of electron and phonon transport, we propose to use surface-decorated silicon nanowires for thermoelectric applications. Two examples of surface decorations are studied to illustrate the underlying ideas: nanotrees and alkyl functionalized silicon nanowires. For both systems we find (i) that the phonon conductance is significantly reduced compared to the electronic conductance leading to high thermoelectric figure of merit ZT, and (ii) for ultrathin wires, surface decoration leads to significantly better performance than surface disorder.
Original languageEnglish
JournalPhysical Review Letters
Volume103
Issue number5
Pages (from-to)055502
ISSN0031-9007
DOIs
StatePublished - 2009

Bibliographical note

Copyright 2009 American Physical Society

CitationsWeb of Science® Times Cited: 89

    Keywords

  • QUANTUM, ELECTRONIC-PROPERTIES, TRANSPORT, SCATTERING, CONDUCTANCE, FORMULA, THERMOPOWER, SI, GROWTH, NANOTREES
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