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

被引：3

作者：

Ding, Mannv ^{[1
]}

Bai, Chunhua ^{[1
]}

Lang, Yudong ^{[2
]}

Wang, Yifeng ^{[1
,3
]}

Pan, Lin ^{[1
,3
]}

Hu, Xiaohui ^{[1
,3
]}

Chen, Changchun ^{[1
,3
]}

He, Shengping ^{[4
]}

Ahmad, Kaleem ^{[5
]}

Almutairi, Zeyad ^{[5
,6
]}

机构：

[1] Nanjing Tech Univ, Coll Mat Sci & Engn, Nanjing 210009, Peoples R China

[2] Nanjing Fiberglass Ressearvh & Design Inst Co Ltd, Nanjing 210012, Peoples R China

[3] Nanjing Tech Univ, Jiangsu Collaborat Innovat Ctr Adv Inorgan Funct C, Nanjing 210009, Peoples R China

[4] Sino Foundry Refractory Jiangsu Co Ltd, Zhenjiang 212114, Peoples R China

[5] King Saud Univ, Coll Engn, Sustainable Energy Technol Ctr, Riyadh 11421, Saudi Arabia

[6] King Saud Univ, Coll Engn, Mech Engn Dept, POB 800, Riyadh 11421, Saudi Arabia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 988卷

基金：

中国国家自然科学基金;

关键词：

Cu2SnSe3; Cobalt; -doping; Thermoelectric; PHASE; POWER;

D O I：

10.1016/j.jallcom.2024.174272

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 mu W 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 similar to 0.7 have been achieved in Cu2Sn0.88Co0.12Se3, almost double that of the pristine one.

引用

页数：8

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