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.
| Original language | English |
|---|---|
| Title of host publication | Materials Research Society Symposium Proceedings |
| Pages | 187-194 |
| Number of pages | 8 |
| Volume | 886 |
| Publication status | Published - 2006 |
| Event | 2005 Materials Research Society Fall Meeting - Boston, MA, United States Duration: Nov 28 2005 → Dec 1 2005 |
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
- Electronic, Optical and Magnetic Materials
Cite this
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, Mercouri G.
Materials Research Society Symposium Proceedings. Vol. 886 2006. p. 187-194.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Nanostructuring and its influence on the thermoelectric properties of the AgSbTe2-SnTe quaternary system
AU - Androulakis, J.
AU - Pcionek, R.
AU - Quarez, E.
AU - Palchik, O.
AU - Kong, H.
AU - Uher, C.
AU - Dangelo, J. J.
AU - Hogan, T.
AU - Tang, X.
AU - Tritt, T.
AU - Kanatzidis, Mercouri G
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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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M3 - Conference contribution
SN - 1558998403
SN - 9781558998407
VL - 886
SP - 187
EP - 194
BT - Materials Research Society Symposium Proceedings
ER -