Dopant distributions in PbTe-based thermoelectric materials

Ivan D. Blum; Dieter Isheim; David N. Seidman; Jiaqing He; John Androulakis; Kanishka Biswas; Vinayak P. Dravid; Mercouri G. Kanatzidis

doi:10.1007/s11664-012-1972-2

Dopant distributions in PbTe-based thermoelectric materials

Ivan D. Blum^*, Dieter Isheim, David N. Seidman, Jiaqing He, John Androulakis, Kanishka Biswas, Vinayak P. Dravid, Mercouri G. Kanatzidis

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Atom-probe tomography (APT) is utilized to characterize the dopant distribution in two thermoelectric materials systems: (1) PbTe-2 mol.%SrTe-1 mol.%Na ₂Te, and (2) codoped PbTe-1.25 mol.%K-1.4 mol.%Na. We observe the presence of Na-rich precipitates of a few nanometers in diameter in both systems. Both concentration frequency distribution analyses and partial radial distribution functions are employed to analyze the tendency for dopant clustering detected by APT. In the codoped sample, K accumulates significantly in Na-rich precipitates, while in the Sr-containing sample, Sr is homogeneously distributed. High-resolution transmission electron microscopy also reveals the presence of precipitates having platelet morphology, which are oriented parallel to the {001} planes.

Original language	English (US)
Pages (from-to)	1583-1588
Number of pages	6
Journal	Journal of Electronic Materials
Volume	41
Issue number	6
DOIs	https://doi.org/10.1007/s11664-012-1972-2
State	Published - Jun 2012

Funding

This research was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, through the Energy Frontier Research Center ‘‘Revolutionary Materials for Solid State Energy Conversion,’’ Award Number DE-SC0001054. The atom-probe tomographic measurements were performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph was purchased and upgraded with funding from NSF-MRI (DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539, N00014-0910781) grants. We also gratefully acknowledge the Initiative for Sustainability and Energy at Northwestern (ISEN) for grants to upgrade the capabilities of NUCAPT. Powder diffraction analyses were performed at the DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT) located at Sector 5 of the Advanced Photon Source (APS). DND-CAT is supported by E.I. DuPont de Nemours & Co., The Dow Chemical Company, and Northwestern University. Use of the APS, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science by Argonne National Laboratory, was supported by the US DOE under Contract No. DE-AC02-06CH11357.

Keywords

K
Na
PbTe
atom-probe tomography
precipitates

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1007/s11664-012-1972-2

Cite this

@article{57322f963f264b969b5cd2dde3f40129,

title = "Dopant distributions in PbTe-based thermoelectric materials",

abstract = "Atom-probe tomography (APT) is utilized to characterize the dopant distribution in two thermoelectric materials systems: (1) PbTe-2 mol.%SrTe-1 mol.%Na 2Te, and (2) codoped PbTe-1.25 mol.%K-1.4 mol.%Na. We observe the presence of Na-rich precipitates of a few nanometers in diameter in both systems. Both concentration frequency distribution analyses and partial radial distribution functions are employed to analyze the tendency for dopant clustering detected by APT. In the codoped sample, K accumulates significantly in Na-rich precipitates, while in the Sr-containing sample, Sr is homogeneously distributed. High-resolution transmission electron microscopy also reveals the presence of precipitates having platelet morphology, which are oriented parallel to the {001} planes.",

keywords = "K, Na, PbTe, atom-probe tomography, precipitates",

author = "Blum, {Ivan D.} and Dieter Isheim and Seidman, {David N.} and Jiaqing He and John Androulakis and Kanishka Biswas and Dravid, {Vinayak P.} and Kanatzidis, {Mercouri G.}",

note = "Funding Information: This research was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, through the Energy Frontier Research Center {\textquoteleft}{\textquoteleft}Revolutionary Materials for Solid State Energy Conversion,{\textquoteright}{\textquoteright} Award Number DE-SC0001054. The atom-probe tomographic measurements were performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph was purchased and upgraded with funding from NSF-MRI (DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539, N00014-0910781) grants. We also gratefully acknowledge the Initiative for Sustainability and Energy at Northwestern (ISEN) for grants to upgrade the capabilities of NUCAPT. Powder diffraction analyses were performed at the DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT) located at Sector 5 of the Advanced Photon Source (APS). DND-CAT is supported by E.I. DuPont de Nemours & Co., The Dow Chemical Company, and Northwestern University. Use of the APS, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science by Argonne National Laboratory, was supported by the US DOE under Contract No. DE-AC02-06CH11357.",

year = "2012",

month = jun,

doi = "10.1007/s11664-012-1972-2",

language = "English (US)",

volume = "41",

pages = "1583--1588",

journal = "Journal of Electronic Materials",

issn = "0361-5235",

publisher = "Springer New York",

number = "6",

}

TY - JOUR

T1 - Dopant distributions in PbTe-based thermoelectric materials

AU - Blum, Ivan D.

AU - Isheim, Dieter

AU - Seidman, David N.

AU - He, Jiaqing

AU - Androulakis, John

AU - Biswas, Kanishka

AU - Dravid, Vinayak P.

AU - Kanatzidis, Mercouri G.

N1 - Funding Information: This research was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, through the Energy Frontier Research Center ‘‘Revolutionary Materials for Solid State Energy Conversion,’’ Award Number DE-SC0001054. The atom-probe tomographic measurements were performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph was purchased and upgraded with funding from NSF-MRI (DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539, N00014-0910781) grants. We also gratefully acknowledge the Initiative for Sustainability and Energy at Northwestern (ISEN) for grants to upgrade the capabilities of NUCAPT. Powder diffraction analyses were performed at the DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT) located at Sector 5 of the Advanced Photon Source (APS). DND-CAT is supported by E.I. DuPont de Nemours & Co., The Dow Chemical Company, and Northwestern University. Use of the APS, an Office of Science User Facility operated for the US Department of Energy (DOE) Office of Science by Argonne National Laboratory, was supported by the US DOE under Contract No. DE-AC02-06CH11357.

PY - 2012/6

Y1 - 2012/6

N2 - Atom-probe tomography (APT) is utilized to characterize the dopant distribution in two thermoelectric materials systems: (1) PbTe-2 mol.%SrTe-1 mol.%Na 2Te, and (2) codoped PbTe-1.25 mol.%K-1.4 mol.%Na. We observe the presence of Na-rich precipitates of a few nanometers in diameter in both systems. Both concentration frequency distribution analyses and partial radial distribution functions are employed to analyze the tendency for dopant clustering detected by APT. In the codoped sample, K accumulates significantly in Na-rich precipitates, while in the Sr-containing sample, Sr is homogeneously distributed. High-resolution transmission electron microscopy also reveals the presence of precipitates having platelet morphology, which are oriented parallel to the {001} planes.

AB - Atom-probe tomography (APT) is utilized to characterize the dopant distribution in two thermoelectric materials systems: (1) PbTe-2 mol.%SrTe-1 mol.%Na 2Te, and (2) codoped PbTe-1.25 mol.%K-1.4 mol.%Na. We observe the presence of Na-rich precipitates of a few nanometers in diameter in both systems. Both concentration frequency distribution analyses and partial radial distribution functions are employed to analyze the tendency for dopant clustering detected by APT. In the codoped sample, K accumulates significantly in Na-rich precipitates, while in the Sr-containing sample, Sr is homogeneously distributed. High-resolution transmission electron microscopy also reveals the presence of precipitates having platelet morphology, which are oriented parallel to the {001} planes.

KW - K

KW - Na

KW - PbTe

KW - atom-probe tomography

KW - precipitates

UR - http://www.scopus.com/inward/record.url?scp=84862202327&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862202327&partnerID=8YFLogxK

U2 - 10.1007/s11664-012-1972-2

DO - 10.1007/s11664-012-1972-2

M3 - Article

AN - SCOPUS:84862202327

SN - 0361-5235

VL - 41

SP - 1583

EP - 1588

JO - Journal of Electronic Materials

JF - Journal of Electronic Materials

IS - 6

ER -

Dopant distributions in PbTe-based thermoelectric materials

Abstract

Funding

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this