Thermoelectric Investigation of the Pseudo Binary System PbTe–CoSe2

V. Ponnambalam, Donald T. Morelli

Research output: Contribution to journalArticle

  • 3 Citations

Abstract

Composites of nominal composition (Pb0.98Na0.02Te)1−y(CoSe2)y and (Pb0.95Na0.05Te)1−y(CoSe2)y with y = 0.05–0.15 have been synthesized to study their thermoelectric properties. In these composites CoTe2 is the secondary phase. The room temperature carrier concentration covers a wide range, 0.5–3.3 × 1020/cm3 depending on the composition. The high-temperature thermoelectric properties are similar to those of Na-doped Pb(Te,Se) alloys. The Seebeck coefficient can be as high as ~250 μV/K when the electrical resistivity is approximately 3.5 mΩ cm. The thermal conductivity of all the composites are very low. The CoTe2 seems to have little effect on the transport properties. The highest ZT achieved is ~1.2.

LanguageEnglish (US)
Pages2089-2094
Number of pages6
JournalJournal of Electronic Materials
Volume44
Issue number6
DOIs
StatePublished - Jun 1 2015

Profile

composite materials
Composite materials
Seebeck coefficient
Seebeck effect
Chemical analysis
Transport properties
Carrier concentration
Thermal conductivity
thermal conductivity
transport properties
Temperature
electrical resistivity
room temperature

Keywords

  • cobalt selenide
  • electrical resistivity
  • Hall coefficient
  • Lead telluride
  • Seebeck coefficient
  • thermoelectric properties

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Thermoelectric Investigation of the Pseudo Binary System PbTe–CoSe2 . / Ponnambalam, V.; Morelli, Donald T.

In: Journal of Electronic Materials, Vol. 44, No. 6, 01.06.2015, p. 2089-2094.

Research output: Contribution to journalArticle

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KW - cobalt selenide

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KW - Hall coefficient

KW - Lead telluride

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