PbTe-PbSnS 2 thermoelectric composites

Low lattice thermal conductivity from large microstructures

Steven N. Girard, Thomas C. Chasapis, Jiaqing He, Xiaoyuan Zhou, Euripides Hatzikraniotis, Ctirad Uher, Konstantinos M. Paraskevopoulos, Vinayak P. Dravid, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Recent advances in the field of thermoelectrics have shown embedding appropriate nanostructures can significantly suppress the lattice thermal conductivity and therefore enhance ZT. Here we report a new class of thermoelectric composites of PbTe-PbSnS 2. PbSnS 2 is a naturally layered material (space group Pnma) comprised of Sn-Pb bilayers approximately 0.6 nm in thickness. High resolution transmission electron microscopy reveals the PbSnS 2 segregates into coherent lamellar structures 50-100 nm in thickness that extend 100 nm to 15 μm in length. Despite the relatively large size of the PbSnS 2 precipitates, we find that incorporation of PbSnS 2 in PbTe results in significant reduction in lattice thermal conductivity to 0.4-0.65 W m -1 K -1 over the temperature range 300-700 K, a reduction of 50-70% over bulk PbTe. As a result, a maximum ZT of 1.1 is obtained for ingot samples of the PbTe-PbSnS 2 6% composition. We provide extensive characterization of the physical, structural, and chemical properties of this materials system including powder X-ray diffraction, infrared reflectivity, scanning and transmission electron microscopy, and thermoelectric properties measurements. The synthesis method is simple and general, opening possibilities for similar systems to yield materials exhibiting low lattice thermal conductivity without it being necessary to embed nanoscale (5-20 nm) features.

Original languageEnglish
Pages (from-to)8716-8725
Number of pages10
JournalEnergy and Environmental Science
Volume5
Issue number9
DOIs
Publication statusPublished - Sep 2012

Fingerprint

thermal conductivity
Thermal conductivity
microstructure
Microstructure
transmission electron microscopy
Composite materials
Lamellar structures
Ingots
High resolution transmission electron microscopy
X ray powder diffraction
reflectivity
Chemical properties
Structural properties
Precipitates
chemical property
Nanostructures
Physical properties
scanning electron microscopy
X-ray diffraction
Transmission electron microscopy

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Chemistry
  • Pollution
  • Nuclear Energy and Engineering

Cite this

PbTe-PbSnS 2 thermoelectric composites : Low lattice thermal conductivity from large microstructures. / Girard, Steven N.; Chasapis, Thomas C.; He, Jiaqing; Zhou, Xiaoyuan; Hatzikraniotis, Euripides; Uher, Ctirad; Paraskevopoulos, Konstantinos M.; Dravid, Vinayak P.; Kanatzidis, Mercouri G.

In: Energy and Environmental Science, Vol. 5, No. 9, 09.2012, p. 8716-8725.

Research output: Contribution to journalArticle

Girard, SN, Chasapis, TC, He, J, Zhou, X, Hatzikraniotis, E, Uher, C, Paraskevopoulos, KM, Dravid, VP & Kanatzidis, MG 2012, 'PbTe-PbSnS 2 thermoelectric composites: Low lattice thermal conductivity from large microstructures', Energy and Environmental Science, vol. 5, no. 9, pp. 8716-8725. https://doi.org/10.1039/c2ee22495j
Girard, Steven N. ; Chasapis, Thomas C. ; He, Jiaqing ; Zhou, Xiaoyuan ; Hatzikraniotis, Euripides ; Uher, Ctirad ; Paraskevopoulos, Konstantinos M. ; Dravid, Vinayak P. ; Kanatzidis, Mercouri G. / PbTe-PbSnS 2 thermoelectric composites : Low lattice thermal conductivity from large microstructures. In: Energy and Environmental Science. 2012 ; Vol. 5, No. 9. pp. 8716-8725.
@article{e13303bff33d4cc4bc388339e6e33897,
title = "PbTe-PbSnS 2 thermoelectric composites: Low lattice thermal conductivity from large microstructures",
abstract = "Recent advances in the field of thermoelectrics have shown embedding appropriate nanostructures can significantly suppress the lattice thermal conductivity and therefore enhance ZT. Here we report a new class of thermoelectric composites of PbTe-PbSnS 2. PbSnS 2 is a naturally layered material (space group Pnma) comprised of Sn-Pb bilayers approximately 0.6 nm in thickness. High resolution transmission electron microscopy reveals the PbSnS 2 segregates into coherent lamellar structures 50-100 nm in thickness that extend 100 nm to 15 μm in length. Despite the relatively large size of the PbSnS 2 precipitates, we find that incorporation of PbSnS 2 in PbTe results in significant reduction in lattice thermal conductivity to 0.4-0.65 W m -1 K -1 over the temperature range 300-700 K, a reduction of 50-70{\%} over bulk PbTe. As a result, a maximum ZT of 1.1 is obtained for ingot samples of the PbTe-PbSnS 2 6{\%} composition. We provide extensive characterization of the physical, structural, and chemical properties of this materials system including powder X-ray diffraction, infrared reflectivity, scanning and transmission electron microscopy, and thermoelectric properties measurements. The synthesis method is simple and general, opening possibilities for similar systems to yield materials exhibiting low lattice thermal conductivity without it being necessary to embed nanoscale (5-20 nm) features.",
author = "Girard, {Steven N.} and Chasapis, {Thomas C.} and Jiaqing He and Xiaoyuan Zhou and Euripides Hatzikraniotis and Ctirad Uher and Paraskevopoulos, {Konstantinos M.} and Dravid, {Vinayak P.} and Kanatzidis, {Mercouri G}",
year = "2012",
month = "9",
doi = "10.1039/c2ee22495j",
language = "English",
volume = "5",
pages = "8716--8725",
journal = "Energy and Environmental Science",
issn = "1754-5692",
publisher = "Royal Society of Chemistry",
number = "9",

}

TY - JOUR

T1 - PbTe-PbSnS 2 thermoelectric composites

T2 - Low lattice thermal conductivity from large microstructures

AU - Girard, Steven N.

AU - Chasapis, Thomas C.

AU - He, Jiaqing

AU - Zhou, Xiaoyuan

AU - Hatzikraniotis, Euripides

AU - Uher, Ctirad

AU - Paraskevopoulos, Konstantinos M.

AU - Dravid, Vinayak P.

AU - Kanatzidis, Mercouri G

PY - 2012/9

Y1 - 2012/9

N2 - Recent advances in the field of thermoelectrics have shown embedding appropriate nanostructures can significantly suppress the lattice thermal conductivity and therefore enhance ZT. Here we report a new class of thermoelectric composites of PbTe-PbSnS 2. PbSnS 2 is a naturally layered material (space group Pnma) comprised of Sn-Pb bilayers approximately 0.6 nm in thickness. High resolution transmission electron microscopy reveals the PbSnS 2 segregates into coherent lamellar structures 50-100 nm in thickness that extend 100 nm to 15 μm in length. Despite the relatively large size of the PbSnS 2 precipitates, we find that incorporation of PbSnS 2 in PbTe results in significant reduction in lattice thermal conductivity to 0.4-0.65 W m -1 K -1 over the temperature range 300-700 K, a reduction of 50-70% over bulk PbTe. As a result, a maximum ZT of 1.1 is obtained for ingot samples of the PbTe-PbSnS 2 6% composition. We provide extensive characterization of the physical, structural, and chemical properties of this materials system including powder X-ray diffraction, infrared reflectivity, scanning and transmission electron microscopy, and thermoelectric properties measurements. The synthesis method is simple and general, opening possibilities for similar systems to yield materials exhibiting low lattice thermal conductivity without it being necessary to embed nanoscale (5-20 nm) features.

AB - Recent advances in the field of thermoelectrics have shown embedding appropriate nanostructures can significantly suppress the lattice thermal conductivity and therefore enhance ZT. Here we report a new class of thermoelectric composites of PbTe-PbSnS 2. PbSnS 2 is a naturally layered material (space group Pnma) comprised of Sn-Pb bilayers approximately 0.6 nm in thickness. High resolution transmission electron microscopy reveals the PbSnS 2 segregates into coherent lamellar structures 50-100 nm in thickness that extend 100 nm to 15 μm in length. Despite the relatively large size of the PbSnS 2 precipitates, we find that incorporation of PbSnS 2 in PbTe results in significant reduction in lattice thermal conductivity to 0.4-0.65 W m -1 K -1 over the temperature range 300-700 K, a reduction of 50-70% over bulk PbTe. As a result, a maximum ZT of 1.1 is obtained for ingot samples of the PbTe-PbSnS 2 6% composition. We provide extensive characterization of the physical, structural, and chemical properties of this materials system including powder X-ray diffraction, infrared reflectivity, scanning and transmission electron microscopy, and thermoelectric properties measurements. The synthesis method is simple and general, opening possibilities for similar systems to yield materials exhibiting low lattice thermal conductivity without it being necessary to embed nanoscale (5-20 nm) features.

UR - http://www.scopus.com/inward/record.url?scp=84865207875&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865207875&partnerID=8YFLogxK

U2 - 10.1039/c2ee22495j

DO - 10.1039/c2ee22495j

M3 - Article

VL - 5

SP - 8716

EP - 8725

JO - Energy and Environmental Science

JF - Energy and Environmental Science

SN - 1754-5692

IS - 9

ER -