Effects of antimony on the thermoelectric properties of the cubic Pb 9.6SbyTe10-xSex materials

Pierre F P Poudeu, Jonathan D'Angelo, Adam Downey, Robert Pcionek, Joseph Sootsman, Zhenhua Zhou, Oleg Palchik, Timothy P. Hogan, Ctirad Uher, Mercouri G Kanatzidis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The thermoelectric properties of Pb9.6SbyTe 10-xSex were investigated in the intermediate temperature range of 300 - 700 K. The effect of the variation of Sb content (y) on the electronic properties of the materials is remarkable. Samples with compositions Pb9.6Sb0.2Te10-x Sex (y = 0.2) show the best combination of low thermal conductivity with moderate electrical conductivity and thermopower. For Pb9.6Sb0.2Te xSe2 (x = 2) a maximum figure of merit of ZT∼ 1.1 was obtained around 700 K. This value is nearly 1.4 times higher than that of PbTe at 700 K. This enhancement of the figure of merit of Pb9.6Sb 0.2Te8Se2 derives from its extremely low ! thermal conductivity (-0.7 at W/m.K at 700 K). High resolution transmission electron microscopy of Pb9.6Sb0.2Te10-xSe x samples shows broadly distributed Sb-rich nanocrystals, which may be the key feature responsible for the suppression of the thermal conductivity.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Pages195-200
Number of pages6
Volume886
Publication statusPublished - 2006
Event2005 Materials Research Society Fall Meeting - Boston, MA, United States
Duration: Nov 28 2005Dec 1 2005

Other

Other2005 Materials Research Society Fall Meeting
CountryUnited States
CityBoston, MA
Period11/28/0512/1/05

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Poudeu, P. F. P., D'Angelo, J., Downey, A., Pcionek, R., Sootsman, J., Zhou, Z., ... Kanatzidis, M. G. (2006). Effects of antimony on the thermoelectric properties of the cubic Pb 9.6SbyTe10-xSex materials. In Materials Research Society Symposium Proceedings (Vol. 886, pp. 195-200)