Enhanced thermoelectric performance of SnTe alloy with Ce and Li co-doping

F. Guo; B. Cui; M. Guo; J. Wang; J. Cao; W. Cai; J. Sui

doi:10.1016/j.mtphys.2019.100156

Enhanced thermoelectric performance of SnTe alloy with Ce and Li co-doping

F. Guo
, B. Cui
, M. Guo
, J. Wang
, J. Cao
, W. Cai
, J. Sui^*

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology

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

36 Scopus citations

Abstract

SnTe alloy is a kind of potential medium-temperature thermoelectric material to replace toxic PbTe. In this work, we demonstrate that both trivalent Ce doping and univalent Li doping can optimize the thermoelectric properties of SnTe by controlling carrier concentration in two directions, respectively. In addition, the dispersed high-density nano-precipitates caused by Li doping are helpful to enhance the phonon scattering and then reduce the lattice thermal conductivity. Moreover, co-doping of Ce and Li promotes the peak ZT and average ZT of SnTe simultaneously. The ZT value reaches approximately1 at 873 K and the ZT_ave reaches approximately 0.39 from 300 K to 873 K for Sn_0.98Ce_0.02Te-(Li₂Te)_0.01.

Original language	English
Article number	100156
Journal	Materials Today Physics
Volume	11
DOIs	https://doi.org/10.1016/j.mtphys.2019.100156
State	Published - Dec 2019

Keywords

Carrier concentration
Figure of merit
Nano-precipitate
Tin tellurideTin telluride

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10.1016/j.mtphys.2019.100156

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title = "Enhanced thermoelectric performance of SnTe alloy with Ce and Li co-doping",

abstract = "SnTe alloy is a kind of potential medium-temperature thermoelectric material to replace toxic PbTe. In this work, we demonstrate that both trivalent Ce doping and univalent Li doping can optimize the thermoelectric properties of SnTe by controlling carrier concentration in two directions, respectively. In addition, the dispersed high-density nano-precipitates caused by Li doping are helpful to enhance the phonon scattering and then reduce the lattice thermal conductivity. Moreover, co-doping of Ce and Li promotes the peak ZT and average ZT of SnTe simultaneously. The ZT value reaches approximately1 at 873 K and the ZTave reaches approximately 0.39 from 300 K to 873 K for Sn0.98Ce0.02Te-(Li2Te)0.01.",

keywords = "Carrier concentration, Figure of merit, Nano-precipitate, Tin tellurideTin telluride",

author = "F. Guo and B. Cui and M. Guo and J. Wang and J. Cao and W. Cai and J. Sui",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = dec,

doi = "10.1016/j.mtphys.2019.100156",

language = "英语",

volume = "11",

journal = "Materials Today Physics",

issn = "2542-5293",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Enhanced thermoelectric performance of SnTe alloy with Ce and Li co-doping

AU - Guo, F.

AU - Cui, B.

AU - Guo, M.

AU - Wang, J.

AU - Cao, J.

AU - Cai, W.

AU - Sui, J.

PY - 2019/12

Y1 - 2019/12

N2 - SnTe alloy is a kind of potential medium-temperature thermoelectric material to replace toxic PbTe. In this work, we demonstrate that both trivalent Ce doping and univalent Li doping can optimize the thermoelectric properties of SnTe by controlling carrier concentration in two directions, respectively. In addition, the dispersed high-density nano-precipitates caused by Li doping are helpful to enhance the phonon scattering and then reduce the lattice thermal conductivity. Moreover, co-doping of Ce and Li promotes the peak ZT and average ZT of SnTe simultaneously. The ZT value reaches approximately1 at 873 K and the ZTave reaches approximately 0.39 from 300 K to 873 K for Sn0.98Ce0.02Te-(Li2Te)0.01.

AB - SnTe alloy is a kind of potential medium-temperature thermoelectric material to replace toxic PbTe. In this work, we demonstrate that both trivalent Ce doping and univalent Li doping can optimize the thermoelectric properties of SnTe by controlling carrier concentration in two directions, respectively. In addition, the dispersed high-density nano-precipitates caused by Li doping are helpful to enhance the phonon scattering and then reduce the lattice thermal conductivity. Moreover, co-doping of Ce and Li promotes the peak ZT and average ZT of SnTe simultaneously. The ZT value reaches approximately1 at 873 K and the ZTave reaches approximately 0.39 from 300 K to 873 K for Sn0.98Ce0.02Te-(Li2Te)0.01.

KW - Carrier concentration

KW - Figure of merit

KW - Nano-precipitate

KW - Tin tellurideTin telluride

UR - https://www.scopus.com/pages/publications/85078932174

U2 - 10.1016/j.mtphys.2019.100156

DO - 10.1016/j.mtphys.2019.100156

M3 - 文章

AN - SCOPUS:85078932174

SN - 2542-5293

VL - 11

JO - Materials Today Physics

JF - Materials Today Physics

M1 - 100156

ER -

Enhanced thermoelectric performance of SnTe alloy with Ce and Li co-doping

Abstract

Keywords

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