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 language | English |
|---|---|
| Title of host publication | Materials Research Society Symposium Proceedings |
| Pages | 177-182 |
| Number of pages | 6 |
| Volume | 1166 |
| Publication status | Published - 2009 |
| Event | 2009 MRS Spring Meeting: Materials and Devices for Thermal-to-Electric Energy Conversion - San Francisco, CA, United States Duration: Apr 13 2009 → Apr 17 2009 |
Other
| Other | 2009 MRS Spring Meeting: Materials and Devices for Thermal-to-Electric Energy Conversion |
|---|---|
| Country | United States |
| City | San Francisco, CA |
| Period | 4/13/09 → 4/17/09 |
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ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering
- Mechanics of Materials
Cite this
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 proceeding › Conference contribution
}
TY - GEN
T1 - The effect on thermoelectric properties of Cd substitution in PbTe
AU - Ahn, Kyunghan
AU - Han, Mi Kyung
AU - Vermeulen, Derek
AU - Moses, Steven
AU - Uher, Ctirad
AU - Kanatzidis, Mercouri G
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=74549219366&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=74549219366&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:74549219366
SN - 9781605111391
VL - 1166
SP - 177
EP - 182
BT - Materials Research Society Symposium Proceedings
ER -