Thermoelectric transport properties of polycrystalline SnSe alloyed with PbSe

Tian Ran Wei, Gangjian Tan, Chao Feng Wu, Cheng Chang, Li Dong Zhao, Jing Feng Li, G. Jeffrey Snyder, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Single-crystal SnSe has been found to exhibit exceptional thermoelectric performance, but the efficiency of polycrystalline samples is still far from satisfactory. In this work, with an intention to effectively suppress heat conduction and minimally affect hole transport, we alloyed p-type polycrystalline SnSe with PbSe. Single-phase Sn1−xPbxSe solid solutions were formed up to x ≈ 0.12. The lattice thermal conductivity was reduced from 1.4 to 0.85 W m−1 K−1 by 12 at. % PbSe alloying due to strain and mass fluctuations. Interestingly, the Seebeck coefficient and carrier concentration were nearly unchanged by Pb substitution, indicating a constant effective mass and an undisrupted valence band maximum. A peak figure of merit (ZT) of 0.85 at 800 K was obtained in the x = 0 sample, and relatively high performance was also achieved in solid solutions. A concise model was developed involving multiple carrier scattering mechanisms, capturing the dependence of the mobility on composition and temperature.

Original languageEnglish
Article number053901
JournalApplied Physics Letters
Volume110
Issue number5
DOIs
Publication statusPublished - Jan 30 2017

Fingerprint

solid solutions
transport properties
Seebeck effect
figure of merit
conductive heat transfer
alloying
thermal conductivity
substitutes
valence
single crystals
scattering
temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Thermoelectric transport properties of polycrystalline SnSe alloyed with PbSe. / Wei, Tian Ran; Tan, Gangjian; Wu, Chao Feng; Chang, Cheng; Zhao, Li Dong; Li, Jing Feng; Snyder, G. Jeffrey; Kanatzidis, Mercouri G.

In: Applied Physics Letters, Vol. 110, No. 5, 053901, 30.01.2017.

Research output: Contribution to journalArticle

Wei, TR, Tan, G, Wu, CF, Chang, C, Zhao, LD, Li, JF, Snyder, GJ & Kanatzidis, MG 2017, 'Thermoelectric transport properties of polycrystalline SnSe alloyed with PbSe', Applied Physics Letters, vol. 110, no. 5, 053901. https://doi.org/10.1063/1.4975603
Wei, Tian Ran ; Tan, Gangjian ; Wu, Chao Feng ; Chang, Cheng ; Zhao, Li Dong ; Li, Jing Feng ; Snyder, G. Jeffrey ; Kanatzidis, Mercouri G. / Thermoelectric transport properties of polycrystalline SnSe alloyed with PbSe. In: Applied Physics Letters. 2017 ; Vol. 110, No. 5.
@article{aa968638ecd74c0299ce284f3eb69d2f,
title = "Thermoelectric transport properties of polycrystalline SnSe alloyed with PbSe",
abstract = "Single-crystal SnSe has been found to exhibit exceptional thermoelectric performance, but the efficiency of polycrystalline samples is still far from satisfactory. In this work, with an intention to effectively suppress heat conduction and minimally affect hole transport, we alloyed p-type polycrystalline SnSe with PbSe. Single-phase Sn1−xPbxSe solid solutions were formed up to x ≈ 0.12. The lattice thermal conductivity was reduced from 1.4 to 0.85 W m−1 K−1 by 12 at. {\%} PbSe alloying due to strain and mass fluctuations. Interestingly, the Seebeck coefficient and carrier concentration were nearly unchanged by Pb substitution, indicating a constant effective mass and an undisrupted valence band maximum. A peak figure of merit (ZT) of 0.85 at 800 K was obtained in the x = 0 sample, and relatively high performance was also achieved in solid solutions. A concise model was developed involving multiple carrier scattering mechanisms, capturing the dependence of the mobility on composition and temperature.",
author = "Wei, {Tian Ran} and Gangjian Tan and Wu, {Chao Feng} and Cheng Chang and Zhao, {Li Dong} and Li, {Jing Feng} and Snyder, {G. Jeffrey} and Kanatzidis, {Mercouri G}",
year = "2017",
month = "1",
day = "30",
doi = "10.1063/1.4975603",
language = "English",
volume = "110",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "5",

}

TY - JOUR

T1 - Thermoelectric transport properties of polycrystalline SnSe alloyed with PbSe

AU - Wei, Tian Ran

AU - Tan, Gangjian

AU - Wu, Chao Feng

AU - Chang, Cheng

AU - Zhao, Li Dong

AU - Li, Jing Feng

AU - Snyder, G. Jeffrey

AU - Kanatzidis, Mercouri G

PY - 2017/1/30

Y1 - 2017/1/30

N2 - Single-crystal SnSe has been found to exhibit exceptional thermoelectric performance, but the efficiency of polycrystalline samples is still far from satisfactory. In this work, with an intention to effectively suppress heat conduction and minimally affect hole transport, we alloyed p-type polycrystalline SnSe with PbSe. Single-phase Sn1−xPbxSe solid solutions were formed up to x ≈ 0.12. The lattice thermal conductivity was reduced from 1.4 to 0.85 W m−1 K−1 by 12 at. % PbSe alloying due to strain and mass fluctuations. Interestingly, the Seebeck coefficient and carrier concentration were nearly unchanged by Pb substitution, indicating a constant effective mass and an undisrupted valence band maximum. A peak figure of merit (ZT) of 0.85 at 800 K was obtained in the x = 0 sample, and relatively high performance was also achieved in solid solutions. A concise model was developed involving multiple carrier scattering mechanisms, capturing the dependence of the mobility on composition and temperature.

AB - Single-crystal SnSe has been found to exhibit exceptional thermoelectric performance, but the efficiency of polycrystalline samples is still far from satisfactory. In this work, with an intention to effectively suppress heat conduction and minimally affect hole transport, we alloyed p-type polycrystalline SnSe with PbSe. Single-phase Sn1−xPbxSe solid solutions were formed up to x ≈ 0.12. The lattice thermal conductivity was reduced from 1.4 to 0.85 W m−1 K−1 by 12 at. % PbSe alloying due to strain and mass fluctuations. Interestingly, the Seebeck coefficient and carrier concentration were nearly unchanged by Pb substitution, indicating a constant effective mass and an undisrupted valence band maximum. A peak figure of merit (ZT) of 0.85 at 800 K was obtained in the x = 0 sample, and relatively high performance was also achieved in solid solutions. A concise model was developed involving multiple carrier scattering mechanisms, capturing the dependence of the mobility on composition and temperature.

UR - http://www.scopus.com/inward/record.url?scp=85011715881&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85011715881&partnerID=8YFLogxK

U2 - 10.1063/1.4975603

DO - 10.1063/1.4975603

M3 - Article

VL - 110

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 5

M1 - 053901

ER -