The effect on thermoelectric properties of Cd substitution in PbTe

Kyunghan Ahn, Mi Kyung Han, Derek Vermeulen, Steven Moses, Ctirad Uher, Mercouri G. Kanatzidis

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

Abstract

A recent theoretical study suggested that the substitution of Cd in PbTe can result in a distortion in the electronic density of states (DOS) near the bottom of the conduction band in PbTe. In this study we explored the effect of Cd doping on the thermoelectric properties of PbTe in an effort to test the theoretical prediction that DOS distortion can increase the Seebeck coefficient. We present detailed investigation of structural and spectroscopic data, transmission electron microscopy, as well as transport properties of samples of PbI2 doped PbTe-x% CdTe (x = 1, 3, 5, 7, 10). All samples follow the Pisarenko relationship and no enhancement of the Seebeck coefficient was observed due to DOS distortions. A low lattice thermal conductivity was achieved by nanostructuring observed via high resolution transmission electron microscopy. A maximum ZT of ∼1.2 at ∼720 K was achieved for the 1% CdTe sample.

Original languageEnglish
Title of host publicationMaterials and Devices for Thermal-to-Electric Energy Conversion
PublisherMaterials Research Society
Pages177-182
Number of pages6
ISBN (Print)9781605111391
DOIs
Publication statusPublished - 2009
Event2009 MRS Spring Meeting: Materials and Devices for Thermal-to-Electric Energy Conversion - San Francisco, CA, United States
Duration: Apr 13 2009Apr 17 2009

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1166
ISSN (Print)0272-9172

Other

Other2009 MRS Spring Meeting: Materials and Devices for Thermal-to-Electric Energy Conversion
CountryUnited States
CitySan Francisco, CA
Period4/13/094/17/09

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Ahn, K., Han, M. K., Vermeulen, D., Moses, S., Uher, C., & Kanatzidis, M. G. (2009). The effect on thermoelectric properties of Cd substitution in PbTe. In Materials and Devices for Thermal-to-Electric Energy Conversion (pp. 177-182). (Materials Research Society Symposium Proceedings; Vol. 1166). Materials Research Society. https://doi.org/10.1557/proc-1166-n06-09