Self-assembled nanometer lamellae of thermoelectric PbTe and Sb 2Tc3 with epitaxy-like interfaces

Teruyuki Ikeda, Lauren A. Collins, Vilupanur A. Ravi, Franck S. Gascoin, Sossina M. Haile, G. Jeffrey Snyder*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

129 Scopus citations

Abstract

Utilizing the decomposition of metastable Pb2Sb 6Te11 into PbTe and Sb2Te3, we produced a layered (lamellar) microstructure of PbTe and Sb2Te 3 in which the interlamellar spacing can be controlled by the temperature and time of the decomposition process. Adjacent PbTe and Sb 2Te3 lamellae are crystallo-graphically oriented, indicating high-quality epitaxy-like interfaces. Average lamellar spacings as small as 180 nm are observed, corresponding to a PbTe layer thickness of 40 nm. These nanoscale multilayers, formed by bulk processing, resemble thin-film superlattice thermoelectric materials, which have shown exceptionally high thermoelectric efficiency.

Original languageEnglish (US)
Pages (from-to)763-767
Number of pages5
JournalChemistry of Materials
Volume19
Issue number4
DOIs
StatePublished - Feb 20 2007

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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