Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi2O3

Tao Hong; Changrong Guo; Dongyang Wang; Bingchao Qin; Cheng Chang; Xiang Gao; Li Dong Zhao

doi:10.1016/j.mtener.2022.100985

Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi₂O₃

Tao Hong
, Changrong Guo
, Dongyang Wang
, Bingchao Qin
, Cheng Chang^*
, Xiang Gao^*
, Li Dong Zhao^*

^*Corresponding author for this work

Beihang University
Institute of Science and Technology Austria
Center for High Pressure Science & Technology Advanced Research

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

54 Scopus citations

Abstract

SnTe is a promising Pb-free thermoelectric (TE) material with high electrical conductivity. We discovered the synergistic effect of Bi₂O₃ on enhancing the average power factor (PF) and overall ZT value of the SnTe-based thermoelectric material. The introduction of Bi₂O₃ forms plenty of SnO₂, Bi₂O_3, and Bi-rich nanoprecipitates. These interfaces between the SnTe matrix and the nanoprecipitates can enhance the average PF through the energy filtering effect. On the other hand, abundant and diverse nanoprecipitates can significantly diminish the lattice thermal conductivity (κ_lat) through enhanced phonon scattering. The synergistic effect of Bi₂O₃ resulted in a maximum ZT (ZT_max) value of 0.9 at SnTe-2% Bi₂O₃ and an average ZT (ZT_ave) value of 0.4 for SnTe-4% Bi₂O₃ from 300 K to 823 K. The work provides an excellent reference to develop non-toxic high-performance TE materials.

Original language	English
Article number	100985
Journal	Materials Today Energy
Volume	25
DOIs	https://doi.org/10.1016/j.mtener.2022.100985
State	Published - Apr 2022

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy
SDG 13 Climate Action

Keywords

BiO
Eco-friendly thermoelectric material
Energy filtering effect
Nanoprecipitates
Tin telluride

Access to Document

10.1016/j.mtener.2022.100985

Cite this

@article{1e17e6d5b52c42508005ecd8a161a608,

title = "Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi2O3",

abstract = "SnTe is a promising Pb-free thermoelectric (TE) material with high electrical conductivity. We discovered the synergistic effect of Bi2O3 on enhancing the average power factor (PF) and overall ZT value of the SnTe-based thermoelectric material. The introduction of Bi2O3 forms plenty of SnO2, Bi2O3, and Bi-rich nanoprecipitates. These interfaces between the SnTe matrix and the nanoprecipitates can enhance the average PF through the energy filtering effect. On the other hand, abundant and diverse nanoprecipitates can significantly diminish the lattice thermal conductivity (κlat) through enhanced phonon scattering. The synergistic effect of Bi2O3 resulted in a maximum ZT (ZTmax) value of 0.9 at SnTe-2\% Bi2O3 and an average ZT (ZTave) value of 0.4 for SnTe-4\% Bi2O3 from 300 K to 823 K. The work provides an excellent reference to develop non-toxic high-performance TE materials.",

keywords = "BiO, Eco-friendly thermoelectric material, Energy filtering effect, Nanoprecipitates, Tin telluride",

author = "Tao Hong and Changrong Guo and Dongyang Wang and Bingchao Qin and Cheng Chang and Xiang Gao and Zhao, \{Li Dong\}",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = apr,

doi = "10.1016/j.mtener.2022.100985",

language = "英语",

volume = "25",

journal = "Materials Today Energy",

issn = "2468-6069",

publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Enhanced thermoelectric performance in SnTe due to the energy filtering effect introduced by Bi2O3

AU - Hong, Tao

AU - Guo, Changrong

AU - Wang, Dongyang

AU - Qin, Bingchao

AU - Chang, Cheng

AU - Gao, Xiang

AU - Zhao, Li Dong

PY - 2022/4

Y1 - 2022/4

N2 - SnTe is a promising Pb-free thermoelectric (TE) material with high electrical conductivity. We discovered the synergistic effect of Bi2O3 on enhancing the average power factor (PF) and overall ZT value of the SnTe-based thermoelectric material. The introduction of Bi2O3 forms plenty of SnO2, Bi2O3, and Bi-rich nanoprecipitates. These interfaces between the SnTe matrix and the nanoprecipitates can enhance the average PF through the energy filtering effect. On the other hand, abundant and diverse nanoprecipitates can significantly diminish the lattice thermal conductivity (κlat) through enhanced phonon scattering. The synergistic effect of Bi2O3 resulted in a maximum ZT (ZTmax) value of 0.9 at SnTe-2% Bi2O3 and an average ZT (ZTave) value of 0.4 for SnTe-4% Bi2O3 from 300 K to 823 K. The work provides an excellent reference to develop non-toxic high-performance TE materials.

AB - SnTe is a promising Pb-free thermoelectric (TE) material with high electrical conductivity. We discovered the synergistic effect of Bi2O3 on enhancing the average power factor (PF) and overall ZT value of the SnTe-based thermoelectric material. The introduction of Bi2O3 forms plenty of SnO2, Bi2O3, and Bi-rich nanoprecipitates. These interfaces between the SnTe matrix and the nanoprecipitates can enhance the average PF through the energy filtering effect. On the other hand, abundant and diverse nanoprecipitates can significantly diminish the lattice thermal conductivity (κlat) through enhanced phonon scattering. The synergistic effect of Bi2O3 resulted in a maximum ZT (ZTmax) value of 0.9 at SnTe-2% Bi2O3 and an average ZT (ZTave) value of 0.4 for SnTe-4% Bi2O3 from 300 K to 823 K. The work provides an excellent reference to develop non-toxic high-performance TE materials.

KW - BiO

KW - Eco-friendly thermoelectric material

KW - Energy filtering effect

KW - Nanoprecipitates

KW - Tin telluride

UR - https://www.scopus.com/pages/publications/85127322298

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DO - 10.1016/j.mtener.2022.100985

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SN - 2468-6069

VL - 25

JO - Materials Today Energy

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