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Improving the thermoelectric performance of Cu2SnSe3 via regulating micro- and electronic structures

文献类型：期刊论文

作者Ming, Hongwei1,2; Zhu, Chen1,2; Qin, Xiaoying2; Jabar, Bushra1,2; Chen, Tao1,2; Zhang, Jian2; Xin, Hongxing2; Li, Di2; Zhang, Jinhua1,2
刊名NANOSCALE
出版日期2021-02-21
卷号13
ISSN号2040-3364
DOI10.1039/d0nr08045d
通讯作者Qin, Xiaoying(xyqin@issp.ac.cn) ; Zhang, Jian(zhangjian@issp.ac.cn) ; Xin, Hongxing(xinhongxing@issp.ac.cn)
英文摘要As a p-type thermoelectric material, Cu2SnSe3 (CSS) has recently drawn much attention, with its constituents being abundant and free of toxic elements. However, the low electrical conductivity sigma and thermopower S of CSS prohibit its thermoelectric performance. Here, we show that through mechanical milling, a 14 times increase in sigma, around a 2-fold rise in S and a 40% reduction in the lattice thermal conductivity kappa(L) (at 300 K) can be achieved, amazingly. Microstructural analysis combined with first-principles calculations reveal that the increased sigma originates from the generated Sn vacancies , Se dangling bonds and the reconstructed Cu-Sn-terminated acceptor-like surface states; while the enhanced S comes mainly from the enhanced density of states effective mass caused by the Sn vacancies. In addition, the generated Sn vacancies and the in situ formed SnO2 nanoparticles give rise to strong phonon scattering, leading to the reduced kappa(L). As a result, a maximum ZT(m) = 0.9 at 848 K is obtained for the CSS specimen milled for 2 h, which is similar to 3 times larger than that of CSS milled for 0.5 h.
资助项目National Natural Science Foundation of China[11674322] ; National Natural Science Foundation of China[51672278] ; National Natural Science Foundation of China[51972307] ; Anhui Provinical Nature Science Foundation[2008085MA18]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
WOS记录号WOS:000621767000027
出版者ROYAL SOC CHEMISTRY
资助机构National Natural Science Foundation of China ; Anhui Provinical Nature Science Foundation
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/120865]  
专题中国科学院合肥物质科学研究院
通讯作者Qin, Xiaoying; Zhang, Jian; Xin, Hongxing
作者单位1.Univ Sci & Technol China, Hefei 230026, Peoples R China
2.Chinese Acad Sci, Key Lab Photovolta & Energy Conservat Mat, Inst Solid State Phys, HFIPS, Hefei 230026, Peoples R China
推荐引用方式
GB/T 7714		 Ming, Hongwei,Zhu, Chen,Qin, Xiaoying,et al. Improving the thermoelectric performance of Cu2SnSe3 via regulating micro- and electronic structures[J]. NANOSCALE,2021,13.
APA Ming, Hongwei.,Zhu, Chen.,Qin, Xiaoying.,Jabar, Bushra.,Chen, Tao.,...&Zhang, Jinhua.(2021).Improving the thermoelectric performance of Cu2SnSe3 via regulating micro- and electronic structures.NANOSCALE,13.
MLA Ming, Hongwei,et al."Improving the thermoelectric performance of Cu2SnSe3 via regulating micro- and electronic structures".NANOSCALE 13(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

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