In situ nanostructure generation and evolution within a bulk thermoelectric material to reduce lattice thermal conductivity

Steven N. Girard, Jiaqing He, Changpeng Li, Steven Moses, Guoyu Wang, Ctirad Uher, Vinayak P. Dravid, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

We show experimentally the direct reduction in lattice thermal conductivity as a result of in situ nanostructure generation within a thermoelectric material. Solid solution alloys of the high-performance thermoelectric PbTe-PbS 8% can be synthesized through rapid cooling and subsequent high-temperature activation that induces a spontaneous nucleation and growth of PbS nanocrystals. The emergence of coherent PbS nanostructures reduces the lattice thermal conductivity from ∼1 to ∼0.4 W/mK between 400 and 500 K.

Original languageEnglish
Pages (from-to)2825-2831
Number of pages7
JournalNano Letters
Volume10
Issue number8
DOIs
Publication statusPublished - Aug 11 2010

Fingerprint

thermoelectric materials
Nanostructures
Thermal conductivity
thermal conductivity
Nanocrystals
Solid solutions
nanocrystals
Nucleation
solid solutions
Chemical activation
nucleation
activation
Cooling
cooling
Temperature

Keywords

  • nucleation and growth
  • semiconductors
  • thermal conductivity
  • Thermoelectric materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

In situ nanostructure generation and evolution within a bulk thermoelectric material to reduce lattice thermal conductivity. / Girard, Steven N.; He, Jiaqing; Li, Changpeng; Moses, Steven; Wang, Guoyu; Uher, Ctirad; Dravid, Vinayak P.; Kanatzidis, Mercouri G.

In: Nano Letters, Vol. 10, No. 8, 11.08.2010, p. 2825-2831.

Research output: Contribution to journalArticle

Girard, Steven N. ; He, Jiaqing ; Li, Changpeng ; Moses, Steven ; Wang, Guoyu ; Uher, Ctirad ; Dravid, Vinayak P. ; Kanatzidis, Mercouri G. / In situ nanostructure generation and evolution within a bulk thermoelectric material to reduce lattice thermal conductivity. In: Nano Letters. 2010 ; Vol. 10, No. 8. pp. 2825-2831.
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