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 Research Society Symposium Proceedings
Pages177-182
Number of pages6
Volume1166
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

Other

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

Fingerprint

Substitution reactions
Seebeck coefficient
substitutes
Seebeck effect
transmission electron microscopy
Electronic density of states
data transmission
High resolution transmission electron microscopy
Conduction bands
Transport properties
Data communication systems
Thermal conductivity
conduction bands
thermal conductivity
transport properties
Doping (additives)
Transmission electron microscopy
augmentation
high resolution
predictions

ASJC Scopus subject areas

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

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 Research Society Symposium Proceedings (Vol. 1166, pp. 177-182)

The effect on thermoelectric properties of Cd substitution in PbTe. / Ahn, Kyunghan; Han, Mi Kyung; Vermeulen, Derek; Moses, Steven; Uher, Ctirad; Kanatzidis, Mercouri G.

Materials Research Society Symposium Proceedings. Vol. 1166 2009. p. 177-182.

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

Ahn, K, Han, MK, Vermeulen, D, Moses, S, Uher, C & Kanatzidis, MG 2009, The effect on thermoelectric properties of Cd substitution in PbTe. in Materials Research Society Symposium Proceedings. vol. 1166, pp. 177-182, 2009 MRS Spring Meeting: Materials and Devices for Thermal-to-Electric Energy Conversion, San Francisco, CA, United States, 4/13/09.
Ahn K, Han MK, Vermeulen D, Moses S, Uher C, Kanatzidis MG. The effect on thermoelectric properties of Cd substitution in PbTe. In Materials Research Society Symposium Proceedings. Vol. 1166. 2009. p. 177-182
Ahn, Kyunghan ; Han, Mi Kyung ; Vermeulen, Derek ; Moses, Steven ; Uher, Ctirad ; Kanatzidis, Mercouri G. / The effect on thermoelectric properties of Cd substitution in PbTe. Materials Research Society Symposium Proceedings. Vol. 1166 2009. pp. 177-182
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