Enhanced thermoelectric performance of Cu2SnSe3 by synergic effects via cobalt-doping

Mannv Ding; Chunhua Bai; Yudong Lang; Yifeng Wang; Lin Pan; Xiaohui Hu; Changchun Chen; Shengping He; Kaleem Ahmad; Zeyad Almutairi

doi:10.1016/j.jallcom.2024.174272

Enhanced thermoelectric performance of Cu₂SnSe₃ by synergic effects via cobalt-doping

Mannv Ding, Chunhua Bai, Yudong Lang, Yifeng Wang, Lin Pan, Xiaohui Hu, Changchun Chen, Shengping He, Kaleem Ahmad, Zeyad Almutairi

College of Materials Science and Engineering

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

4 Scopus citations

Abstract

Diamond-like Cu₂SnSe₃ has drawn intensive attention as an excellent environmentally-friendly p-type thermoelectric material. In this study, the effects of Co-doping at Sn site on its thermoelectric properties were investigated. Results revealed an effective increase in carrier concentration and enhancement of density-of-states (DOS) effective mass m* due to the role of Co as acceptor and probably the contribution of its d states in the valence bands. Consequently, a remarkable power factor of up to 9.55 μW cm⁻¹ K⁻² has been achieved at 823 K. In addition, lattice thermal conductivity was strongly suppressed due to the intensified phonon scattering and softening of bonding as revealed by the sound velocity analysis. Ultimately, a maximal ZT of 0.97 at 823 K and an average ZT of ∼ 0.7 have been achieved in Cu₂Sn_0.88Co_0.12Se₃, almost double that of the pristine one.

Original language	English
Article number	174272
Journal	Journal of Alloys and Compounds
Volume	988
DOIs	https://doi.org/10.1016/j.jallcom.2024.174272
State	Published - 15 Jun 2024

Keywords

Cobalt-doping
CuSnSe
Thermoelectric

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10.1016/j.jallcom.2024.174272

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title = "Enhanced thermoelectric performance of Cu2SnSe3 by synergic effects via cobalt-doping",

abstract = "Diamond-like Cu2SnSe3 has drawn intensive attention as an excellent environmentally-friendly p-type thermoelectric material. In this study, the effects of Co-doping at Sn site on its thermoelectric properties were investigated. Results revealed an effective increase in carrier concentration and enhancement of density-of-states (DOS) effective mass m* due to the role of Co as acceptor and probably the contribution of its d states in the valence bands. Consequently, a remarkable power factor of up to 9.55 μW cm−1 K−2 has been achieved at 823 K. In addition, lattice thermal conductivity was strongly suppressed due to the intensified phonon scattering and softening of bonding as revealed by the sound velocity analysis. Ultimately, a maximal ZT of 0.97 at 823 K and an average ZT of ∼ 0.7 have been achieved in Cu2Sn0.88Co0.12Se3, almost double that of the pristine one.",

keywords = "Cobalt-doping, CuSnSe, Thermoelectric",

author = "Mannv Ding and Chunhua Bai and Yudong Lang and Yifeng Wang and Lin Pan and Xiaohui Hu and Changchun Chen and Shengping He and Kaleem Ahmad and Zeyad Almutairi",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2024",

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day = "15",

doi = "10.1016/j.jallcom.2024.174272",

language = "英语",

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journal = "Journal of Alloys and Compounds",

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TY - JOUR

T1 - Enhanced thermoelectric performance of Cu2SnSe3 by synergic effects via cobalt-doping

AU - Ding, Mannv

AU - Bai, Chunhua

AU - Lang, Yudong

AU - Wang, Yifeng

AU - Pan, Lin

AU - Hu, Xiaohui

AU - Chen, Changchun

AU - He, Shengping

AU - Ahmad, Kaleem

AU - Almutairi, Zeyad

PY - 2024/6/15

Y1 - 2024/6/15

N2 - Diamond-like Cu2SnSe3 has drawn intensive attention as an excellent environmentally-friendly p-type thermoelectric material. In this study, the effects of Co-doping at Sn site on its thermoelectric properties were investigated. Results revealed an effective increase in carrier concentration and enhancement of density-of-states (DOS) effective mass m* due to the role of Co as acceptor and probably the contribution of its d states in the valence bands. Consequently, a remarkable power factor of up to 9.55 μW cm−1 K−2 has been achieved at 823 K. In addition, lattice thermal conductivity was strongly suppressed due to the intensified phonon scattering and softening of bonding as revealed by the sound velocity analysis. Ultimately, a maximal ZT of 0.97 at 823 K and an average ZT of ∼ 0.7 have been achieved in Cu2Sn0.88Co0.12Se3, almost double that of the pristine one.

AB - Diamond-like Cu2SnSe3 has drawn intensive attention as an excellent environmentally-friendly p-type thermoelectric material. In this study, the effects of Co-doping at Sn site on its thermoelectric properties were investigated. Results revealed an effective increase in carrier concentration and enhancement of density-of-states (DOS) effective mass m* due to the role of Co as acceptor and probably the contribution of its d states in the valence bands. Consequently, a remarkable power factor of up to 9.55 μW cm−1 K−2 has been achieved at 823 K. In addition, lattice thermal conductivity was strongly suppressed due to the intensified phonon scattering and softening of bonding as revealed by the sound velocity analysis. Ultimately, a maximal ZT of 0.97 at 823 K and an average ZT of ∼ 0.7 have been achieved in Cu2Sn0.88Co0.12Se3, almost double that of the pristine one.

KW - Cobalt-doping

KW - CuSnSe

KW - Thermoelectric

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U2 - 10.1016/j.jallcom.2024.174272

DO - 10.1016/j.jallcom.2024.174272

M3 - 文章

AN - SCOPUS:85189077771

SN - 0925-8388

VL - 988

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 174272

ER -

Enhanced thermoelectric performance of Cu₂SnSe₃ by synergic effects via cobalt-doping

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Keywords

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