Strong phonon scattering by layer structured PbSnS2 in PbTe based thermoelectric materials

Jiaqing He, Steven N. Girard, Jin Cheng Zheng, Lidong Zhao, Mercouri G Kanatzidis, Vinayak P. Dravid

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

The incorporation of PbSnS2 in PbTe results in a tremendous reduction of the lattice thermal conductivity to 0.8 W/mK at room temperature, a reduction of almost 60% over bulk PbTe. Transmission electron microscopy reveals very high density displacement layers, misfit dislocations, and phase boundaries. Our thermal transport calculations based on modified Debye-Callaway model, well in agreement with the experimental measurements, reveal that the layer structured PbSnS2 plays an important role in reducing the lattice thermal conductivity.

Original languageEnglish
Pages (from-to)4440-4444
Number of pages5
JournalAdvanced Materials
Volume24
Issue number32
DOIs
Publication statusPublished - Aug 22 2012

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Phonon scattering
Thermal conductivity
Phase boundaries
Dislocations (crystals)
Transmission electron microscopy
Temperature
Hot Temperature

Keywords

  • displacement layers
  • lattice thermal conductivity
  • phonon scattering
  • thermoelectric materials
  • transmission electron microscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Strong phonon scattering by layer structured PbSnS2 in PbTe based thermoelectric materials. / He, Jiaqing; Girard, Steven N.; Zheng, Jin Cheng; Zhao, Lidong; Kanatzidis, Mercouri G; Dravid, Vinayak P.

In: Advanced Materials, Vol. 24, No. 32, 22.08.2012, p. 4440-4444.

Research output: Contribution to journalArticle

He, Jiaqing ; Girard, Steven N. ; Zheng, Jin Cheng ; Zhao, Lidong ; Kanatzidis, Mercouri G ; Dravid, Vinayak P. / Strong phonon scattering by layer structured PbSnS2 in PbTe based thermoelectric materials. In: Advanced Materials. 2012 ; Vol. 24, No. 32. pp. 4440-4444.
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