Nanostructuring and its influence on the thermoelectric properties of the AgSbTe2-SnTe quaternary system

J. Androulakis; R. Pcionek; E. Quarez; O. Palchik; H. Kong; C. Uher; J. J. Dangelo; T. Hogan; X. Tang; T. Tritt; M. G. Kanatzidis

Nanostructuring and its influence on the thermoelectric properties of the AgSbTe₂-SnTe quaternary system

J. Androulakis, R. Pcionek, E. Quarez, O. Palchik, H. Kong, C. Uher, J. J. Dangelo, T. Hogan, X. Tang, T. Tritt, M. G. Kanatzidis

Northwestern University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

4 Citations (Scopus)

Abstract

The structural and thermoelectric properties of the AgSbTe₂-SnTe quaternary system were studied. Powder averaged x-ray diffraction of Ag _0.85SnSb_1.15Tea indicates a cubic NaCl-type structure in contrast with the single crystal refinements, which point towards tetragonal symmetry. Furthermore, high-resolution electron microscopy imaging revealed the system to be a nano-composite formed by thermodynamically driven compositional fluctuations rather than a solid solution as it was viewed in the past. The lattice thermal conductivity attains very low values, which is in accord with recent theories on thermal transport in heterogeneous systems. The charge transport properties of the system exhibit a rich physical behavior highlighted in the coexistence of an almost metallic carrier concentration (∼5 ×10²¹ cm^-3) with a large thermoelectric power response of ∼160 μVYK at 650 K. This is attributed to a heavy hole effective mass that is almost six times that of the electron rest mass.

Original language	English
Title of host publication	Materials Research Society Symposium Proceedings
Pages	187-194
Number of pages	8
Publication status	Published - May 8 2006
Event	2005 Materials Research Society Fall Meeting - Boston, MA, United States Duration: Nov 28 2005 → Dec 1 2005

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	886
ISSN (Print)	0272-9172

Other

Other	2005 Materials Research Society Fall Meeting
Country	United States
City	Boston, MA
Period	11/28/05 → 12/1/05

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ASJC Scopus subject areas

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

Cite this

Androulakis, J., Pcionek, R., Quarez, E., Palchik, O., Kong, H., Uher, C., Dangelo, J. J., Hogan, T., Tang, X., Tritt, T., & Kanatzidis, M. G. (2006). Nanostructuring and its influence on the thermoelectric properties of the AgSbTe₂-SnTe quaternary system. In Materials Research Society Symposium Proceedings (pp. 187-194). (Materials Research Society Symposium Proceedings; Vol. 886).

Nanostructuring and its influence on the thermoelectric properties of the AgSbTe₂-SnTe quaternary system. / Androulakis, J.; Pcionek, R.; Quarez, E.; Palchik, O.; Kong, H.; Uher, C.; Dangelo, J. J.; Hogan, T.; Tang, X.; Tritt, T.; Kanatzidis, M. G.

Materials Research Society Symposium Proceedings. 2006. p. 187-194 (Materials Research Society Symposium Proceedings; Vol. 886).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Androulakis, J, Pcionek, R, Quarez, E, Palchik, O, Kong, H, Uher, C, Dangelo, JJ, Hogan, T, Tang, X, Tritt, T & Kanatzidis, MG 2006, Nanostructuring and its influence on the thermoelectric properties of the AgSbTe₂-SnTe quaternary system. in Materials Research Society Symposium Proceedings. Materials Research Society Symposium Proceedings, vol. 886, pp. 187-194, 2005 Materials Research Society Fall Meeting, Boston, MA, United States, 11/28/05.

Androulakis, J. ; Pcionek, R. ; Quarez, E. ; Palchik, O. ; Kong, H. ; Uher, C. ; Dangelo, J. J. ; Hogan, T. ; Tang, X. ; Tritt, T. ; Kanatzidis, M. G. / Nanostructuring and its influence on the thermoelectric properties of the AgSbTe₂-SnTe quaternary system. Materials Research Society Symposium Proceedings. 2006. pp. 187-194 (Materials Research Society Symposium Proceedings).

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abstract = "The structural and thermoelectric properties of the AgSbTe2-SnTe quaternary system were studied. Powder averaged x-ray diffraction of Ag 0.85SnSb1.15Tea indicates a cubic NaCl-type structure in contrast with the single crystal refinements, which point towards tetragonal symmetry. Furthermore, high-resolution electron microscopy imaging revealed the system to be a nano-composite formed by thermodynamically driven compositional fluctuations rather than a solid solution as it was viewed in the past. The lattice thermal conductivity attains very low values, which is in accord with recent theories on thermal transport in heterogeneous systems. The charge transport properties of the system exhibit a rich physical behavior highlighted in the coexistence of an almost metallic carrier concentration (∼5 ×1021 cm-3) with a large thermoelectric power response of ∼160 μVYK at 650 K. This is attributed to a heavy hole effective mass that is almost six times that of the electron rest mass.",

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