Extremely low thermal conductivity and enhanced thermoelectric performance of polycrystalline SnSe by Cu doping

Yaru Gong; Cheng Chang; Wei Wei; Jiang Liu; Wenjie Xiong; Shuang Chai; Di Li; Jian Zhang; Guodong Tang

doi:10.1016/j.scriptamat.2017.12.035

Extremely low thermal conductivity and enhanced thermoelectric performance of polycrystalline SnSe by Cu doping

Yaru Gong
, Cheng Chang
, Wei Wei
, Jiang Liu
, Wenjie Xiong
, Shuang Chai
, Di Li
, Jian Zhang^*
, Guodong Tang

^*Corresponding author for this work

School of Materials Science and Engineering

Nanjing University of Science and Technology
CAS - Institute of Solid State Physics

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

86 Scopus citations

Abstract

Here, we systematically investigated the effect of Cu doping on the thermoelectric properties of SnSe prepared by hydrothermal synthesis. Low Cu doped content (x = 0.01) lead to enhanced electrical conductivity and power factor compared with reported polycrystalline SnSe. Nanoscale precipitates and mesoscale grains define all-scale hierarchical architectures to scattering phonons. Furthermore, Cu atomic point-defect scattering play an important role in reducing the lattice thermal conductivity. These two favorable factors lead to low lattice thermal conductivity as low as 0.2 Wm^{− 1} K^{− 1} at 873 K. This ultralow thermal conductivity results in a ZT of ~ 1.2 at 873 K in Cu_0.01Sn_0.99Se.

Original language	English
Pages (from-to)	74-78
Number of pages	5
Journal	Scripta Materialia
Volume	147
DOIs	https://doi.org/10.1016/j.scriptamat.2017.12.035
State	Published - 1 Apr 2018

Keywords

Thermal conductivity
Thermoelectric materials
Thermoelectric performance

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10.1016/j.scriptamat.2017.12.035

Cite this

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title = "Extremely low thermal conductivity and enhanced thermoelectric performance of polycrystalline SnSe by Cu doping",

abstract = "Here, we systematically investigated the effect of Cu doping on the thermoelectric properties of SnSe prepared by hydrothermal synthesis. Low Cu doped content (x = 0.01) lead to enhanced electrical conductivity and power factor compared with reported polycrystalline SnSe. Nanoscale precipitates and mesoscale grains define all-scale hierarchical architectures to scattering phonons. Furthermore, Cu atomic point-defect scattering play an important role in reducing the lattice thermal conductivity. These two favorable factors lead to low lattice thermal conductivity as low as 0.2 Wm− 1 K− 1 at 873 K. This ultralow thermal conductivity results in a ZT of \textasciitilde{} 1.2 at 873 K in Cu0.01Sn0.99Se.",

keywords = "Thermal conductivity, Thermoelectric materials, Thermoelectric performance",

author = "Yaru Gong and Cheng Chang and Wei Wei and Jiang Liu and Wenjie Xiong and Shuang Chai and Di Li and Jian Zhang and Guodong Tang",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

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day = "1",

doi = "10.1016/j.scriptamat.2017.12.035",

language = "英语",

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TY - JOUR

T1 - Extremely low thermal conductivity and enhanced thermoelectric performance of polycrystalline SnSe by Cu doping

AU - Gong, Yaru

AU - Chang, Cheng

AU - Wei, Wei

AU - Liu, Jiang

AU - Xiong, Wenjie

AU - Chai, Shuang

AU - Li, Di

AU - Zhang, Jian

AU - Tang, Guodong

PY - 2018/4/1

Y1 - 2018/4/1

N2 - Here, we systematically investigated the effect of Cu doping on the thermoelectric properties of SnSe prepared by hydrothermal synthesis. Low Cu doped content (x = 0.01) lead to enhanced electrical conductivity and power factor compared with reported polycrystalline SnSe. Nanoscale precipitates and mesoscale grains define all-scale hierarchical architectures to scattering phonons. Furthermore, Cu atomic point-defect scattering play an important role in reducing the lattice thermal conductivity. These two favorable factors lead to low lattice thermal conductivity as low as 0.2 Wm− 1 K− 1 at 873 K. This ultralow thermal conductivity results in a ZT of ~ 1.2 at 873 K in Cu0.01Sn0.99Se.

AB - Here, we systematically investigated the effect of Cu doping on the thermoelectric properties of SnSe prepared by hydrothermal synthesis. Low Cu doped content (x = 0.01) lead to enhanced electrical conductivity and power factor compared with reported polycrystalline SnSe. Nanoscale precipitates and mesoscale grains define all-scale hierarchical architectures to scattering phonons. Furthermore, Cu atomic point-defect scattering play an important role in reducing the lattice thermal conductivity. These two favorable factors lead to low lattice thermal conductivity as low as 0.2 Wm− 1 K− 1 at 873 K. This ultralow thermal conductivity results in a ZT of ~ 1.2 at 873 K in Cu0.01Sn0.99Se.

KW - Thermal conductivity

KW - Thermoelectric materials

KW - Thermoelectric performance

UR - https://www.scopus.com/pages/publications/85040244236

U2 - 10.1016/j.scriptamat.2017.12.035

DO - 10.1016/j.scriptamat.2017.12.035

M3 - 文章

AN - SCOPUS:85040244236

SN - 1359-6462

VL - 147

SP - 74

EP - 78

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Extremely low thermal conductivity and enhanced thermoelectric performance of polycrystalline SnSe by Cu doping

Abstract

Keywords

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