The effect on thermoelectric properties of Cd substitution in PbTe

Kyunghan Ahn; Mi Kyung Han; Derek Vermeulen; Steven Moses; Ctirad Uher; Mercouri Kanatzidis

The effect on thermoelectric properties of Cd substitution in PbTe

Kyunghan Ahn^*, Mi Kyung Han, Derek Vermeulen, Steven Moses, Ctirad Uher, Mercouri Kanatzidis

^*Corresponding author for this work

Chemistry

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	Materials and Devices for Thermal-to-Electric Energy Conversion
Pages	177-182
Number of pages	6
Volume	1166
State	Published - Dec 1 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/Territory	United States
City	San Francisco, CA
Period	4/13/09 → 4/17/09

ASJC Scopus subject areas

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

Cite this

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title = "The effect on thermoelectric properties of Cd substitution in PbTe",

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.",

author = "Kyunghan Ahn and Han, {Mi Kyung} and Derek Vermeulen and Steven Moses and Ctirad Uher and Mercouri Kanatzidis",

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AU - Ahn, Kyunghan

AU - Han, Mi Kyung

AU - Vermeulen, Derek

AU - Moses, Steven

AU - Uher, Ctirad

AU - Kanatzidis, Mercouri

PY - 2009/12/1

Y1 - 2009/12/1

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.

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T2 - 2009 MRS Spring Meeting: Materials and Devices for Thermal-to-Electric Energy Conversion

Y2 - 13 April 2009 through 17 April 2009

ER -

The effect on thermoelectric properties of Cd substitution in PbTe

Abstract

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ASJC Scopus subject areas

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