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Thermoelectric performance of tellurium-reduced quaternary p-type lead–chalcogenide composites

Journal Article


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Abstract


  • A long-standing technological challenge to the widespread application of thermoelectric generators is obtaining high-performance thermoelectric materials from abundant elements. Intensive study on PbTe alloys has resulted in a high figure of merit for the single-phase ternary PbTe–PbSe system through band structure engineering, and the low thermal conductivity achieved due to nanostructuring leads to high thermoelectric performance for ternary PbTe–PbS compounds. Recently, the single-phase p-type quaternary PbTe–PbSe–PbS alloys have been shown to provide thermoelectric performance superior to the binary and ternary lead chalcogenides. This occurs via tuning of the band structure and from an extraordinary low thermal conductivity resulting from high-contrast atomic mass solute atoms. Here, we present the thermoelectric efficiency of nanostructured p-type quaternary PbTe–PbSe–PbS composites and compare the results with corresponding single-phase quaternary lead chalcogenide alloys. We demonstrate that the very low lattice thermal conductivity achieved is attributed to phonon scattering at high-contrast atomic mass solute atoms rather than from the contribution of secondary phases. This results in a thermoelectric efficiency of ∼1.4 over a wide temperature range (650–850 K) in a p-type quaternary (PbTe)0.65(PbSe)0.1(PbS)0.25 composite that is lower than that of single-phase (PbTe)0.85(PbSe)0.1(PbS)0.05 alloy without secondary phases.

Authors


  •   Aminorroaya-Yamini, Sima (external author)
  •   Wang, Heng (external author)
  •   Gibbs, Zachary M. (external author)
  •   Pei, Yanzhong (external author)
  •   Mitchell, David R. G.
  •   Dou, Shi Xue
  •   Snyder, G Jeffrey. (external author)

Publication Date


  • 2014

Citation


  • Yamini, S. Aminorroaya., Wang, H., Gibbs, Z. M., Pei, Y., Mitchell, D. R. G., Dou, S. Xue. & Snyder, G. Jeffrey. (2014). Thermoelectric performance of tellurium-reduced quaternary p-type lead–chalcogenide composites. Acta Materialia, 80 365-372.

Scopus Eid


  • 2-s2.0-84905056741

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2211&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1210

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 365

End Page


  • 372

Volume


  • 80

Place Of Publication


  • United Kingdom

Abstract


  • A long-standing technological challenge to the widespread application of thermoelectric generators is obtaining high-performance thermoelectric materials from abundant elements. Intensive study on PbTe alloys has resulted in a high figure of merit for the single-phase ternary PbTe–PbSe system through band structure engineering, and the low thermal conductivity achieved due to nanostructuring leads to high thermoelectric performance for ternary PbTe–PbS compounds. Recently, the single-phase p-type quaternary PbTe–PbSe–PbS alloys have been shown to provide thermoelectric performance superior to the binary and ternary lead chalcogenides. This occurs via tuning of the band structure and from an extraordinary low thermal conductivity resulting from high-contrast atomic mass solute atoms. Here, we present the thermoelectric efficiency of nanostructured p-type quaternary PbTe–PbSe–PbS composites and compare the results with corresponding single-phase quaternary lead chalcogenide alloys. We demonstrate that the very low lattice thermal conductivity achieved is attributed to phonon scattering at high-contrast atomic mass solute atoms rather than from the contribution of secondary phases. This results in a thermoelectric efficiency of ∼1.4 over a wide temperature range (650–850 K) in a p-type quaternary (PbTe)0.65(PbSe)0.1(PbS)0.25 composite that is lower than that of single-phase (PbTe)0.85(PbSe)0.1(PbS)0.05 alloy without secondary phases.

Authors


  •   Aminorroaya-Yamini, Sima (external author)
  •   Wang, Heng (external author)
  •   Gibbs, Zachary M. (external author)
  •   Pei, Yanzhong (external author)
  •   Mitchell, David R. G.
  •   Dou, Shi Xue
  •   Snyder, G Jeffrey. (external author)

Publication Date


  • 2014

Citation


  • Yamini, S. Aminorroaya., Wang, H., Gibbs, Z. M., Pei, Y., Mitchell, D. R. G., Dou, S. Xue. & Snyder, G. Jeffrey. (2014). Thermoelectric performance of tellurium-reduced quaternary p-type lead–chalcogenide composites. Acta Materialia, 80 365-372.

Scopus Eid


  • 2-s2.0-84905056741

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2211&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1210

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 365

End Page


  • 372

Volume


  • 80

Place Of Publication


  • United Kingdom