Thermoelectric Properties of CoSb3-xSnx

Michele D. Nielsen; Si Hui; Ctirad Uher; Janusz Tobola; Joseph P. Heremans

Thermoelectric Properties of CoSb3-xSnx

ORAL

Abstract

We substitute Sn for Sb in CoSb3. Band structure calculations predict that Sn should be a resonant level with and energy near the top of the heavy (Co-3d) valence band. This is confirmed experimentally. Indeed, heavily Sn-doped samples show a low-temperature anomaly in their thermopower consistent with this prediction. The hole concentration, however, is too high for this materials to have a high thermopower and figure of merit.

^*This material is based upon work supported by the Department of Energy Award Number DE-PI0000012.

Feb. 28, 2012, 4:18 PM – Feb. 28, 2012, 4:30 PM

Authors

Michele D. Nielsen
- Department of Mechanical Engineering, The Ohio State University
- MAE OSU
Si Hui
- Department of Mechanical Engineering, University of Michigan
Ctirad Uher
- Department of Physics, University of Michigan
Janusz Tobola
- Department of Condensed Matter Physics, AGH University of Science and Technology, Krakow, Poland
Joseph P. Heremans
- Department of Physics, Department of Mechanical Engineering, The Ohio State University