Thermoelectric properties of indium doped PbTe1-ySey alloys

Ashoka Bali, Heng Wang, G. Jeffrey Snyder, Ramesh Chandra Mallik*

*Corresponding author for this work

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Lead telluride and its alloys are well known for their thermoelectric applications. Here, a systematic study of PbTe1-ySey alloys doped with indium has been done. The powder X-Ray diffraction combined with Rietveld analysis confirmed the polycrystalline single phase nature of the samples, while microstructural analysis with scanning electron microscope results showed densification of samples and presence of micrometer sized particles. The temperature dependent transport properties showed that in these alloys, indium neither pinned the Fermi level as it does in PbTe, nor acted as a resonant dopant as in SnTe. At high temperatures, bipolar effect was observed which restricted the zT to 0.66 at 800 K for the sample with 30% Se content.

Original languageEnglish (US)
Article number033707
JournalJournal of Applied Physics
Volume116
Issue number3
DOIs
StatePublished - Jul 21 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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