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Heterogeneous distribution of sodium for high thermoelectric performance of p-type multiphase lead-chalcogenides

Journal Article


Abstract


  • Despite the effectiveness of sodium as a p-type dopant for lead chalcogenides, its solubility is shown to be very limited in these hosts. Here, a high thermoelectric efficiency of ≈2 over a wide temperature range is reported in multiphase quaternary (PbTe)0.65(PbS)0.25(PbSe)0.1 compounds that are doped with sodium at concentrations greater than the solubility limits of the matrix. Although these compounds present room temperature thermoelectric efficiencies similar to sodium doped PbTe, a dramatically enhanced Hall carrier mobility at temperatures above 600 K for heavily doped compounds results in significantly enhanced thermoelectric efficiencies at elevated temperatures. This is achieved through the composition modulation doping mechanism resulting from heterogeneous distribution of the sodium dopant between precipitates and the matrix at elevated temperatures. These results can lead to further advances in designing high performance multiphase thermoelectric materials with intrinsically heterogeneous dopant distributions.

UOW Authors


  •   Aminorroaya-Yamini, Sima (external author)
  •   Mitchell, David
  •   Gibbs, Zachary M. (external author)
  •   Santos, Joao Rafael (external author)
  •   Patterson, Vaughan (external author)
  •   Li, Sean (external author)
  •   Pei, Yanzhong (external author)
  •   Dou, Shi Xue
  •   Snyder, G Jeffrey. (external author)

Publication Date


  • 2015

Citation


  • Aminorroaya-Yamini, S., Mitchell, D. R. G., Gibbs, Z. M., Santos, R., Patterson, V., Li, S., Pei, Y. Zhong., Dou, S. Xue. & Snyder, G. Jeffrey. (2015). Heterogeneous distribution of sodium for high thermoelectric performance of p-type multiphase lead-chalcogenides. Advanced Energy Materials, 5 (21), 1501047-1-1501047-11.

Scopus Eid


  • 2-s2.0-84947043220

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1648

Has Global Citation Frequency


Start Page


  • 1501047-1

End Page


  • 1501047-11

Volume


  • 5

Issue


  • 21

Place Of Publication


  • Germany

Abstract


  • Despite the effectiveness of sodium as a p-type dopant for lead chalcogenides, its solubility is shown to be very limited in these hosts. Here, a high thermoelectric efficiency of ≈2 over a wide temperature range is reported in multiphase quaternary (PbTe)0.65(PbS)0.25(PbSe)0.1 compounds that are doped with sodium at concentrations greater than the solubility limits of the matrix. Although these compounds present room temperature thermoelectric efficiencies similar to sodium doped PbTe, a dramatically enhanced Hall carrier mobility at temperatures above 600 K for heavily doped compounds results in significantly enhanced thermoelectric efficiencies at elevated temperatures. This is achieved through the composition modulation doping mechanism resulting from heterogeneous distribution of the sodium dopant between precipitates and the matrix at elevated temperatures. These results can lead to further advances in designing high performance multiphase thermoelectric materials with intrinsically heterogeneous dopant distributions.

UOW Authors


  •   Aminorroaya-Yamini, Sima (external author)
  •   Mitchell, David
  •   Gibbs, Zachary M. (external author)
  •   Santos, Joao Rafael (external author)
  •   Patterson, Vaughan (external author)
  •   Li, Sean (external author)
  •   Pei, Yanzhong (external author)
  •   Dou, Shi Xue
  •   Snyder, G Jeffrey. (external author)

Publication Date


  • 2015

Citation


  • Aminorroaya-Yamini, S., Mitchell, D. R. G., Gibbs, Z. M., Santos, R., Patterson, V., Li, S., Pei, Y. Zhong., Dou, S. Xue. & Snyder, G. Jeffrey. (2015). Heterogeneous distribution of sodium for high thermoelectric performance of p-type multiphase lead-chalcogenides. Advanced Energy Materials, 5 (21), 1501047-1-1501047-11.

Scopus Eid


  • 2-s2.0-84947043220

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1648

Has Global Citation Frequency


Start Page


  • 1501047-1

End Page


  • 1501047-11

Volume


  • 5

Issue


  • 21

Place Of Publication


  • Germany