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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

97 Scopus citations

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 (US)
Pages (from-to)4440-4444
Number of pages5
JournalAdvanced Materials
Volume24
Issue number32
DOIs
StatePublished - Aug 22 2012

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

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