Knowledge Management System of Hefei Institute of Physical Science,CAS
Boosting Thermoelectric Performance of Cu2SnSe3 via Comprehensive Band Structure Regulation and Intensified Phonon Scattering by Multidimensional Defects | |
Ming, Hongwei1,2; Zhu, Gaofan2,3; Zhu, Chen1,2; Qin, Xiaoying1; Chen, Tao1,2; Zhang, Jian1; Li, Di1; Xin, Hongxing1; Jabar, Bushra1,2 | |
2021-06-22 | |
发表期刊 | ACS NANO |
ISSN | 1936-0851 |
通讯作者 | Qin, Xiaoying(xyqin@issp.ac.cn) ; Zhang, Jian(zhangjian@issp.ac.cn) ; Xin, Hongxing(xinhongxing@issp.ac.cn) |
摘要 | As an eco-friendly thermoelectric material, Cu2SnSe3 has recently drawn much attention. However, its high electrical resistivity rho and low thermopower S prohibit its thermoelectric performance. Herein, we show that a widened band gap and the increased density of states are achieved via S alloying, resulting in 1.6 times enhancement of S (from 170 to 277 mu V/K). Moreover, doping In at the Sn site can cause a 19-fold decrease of rho and a 2.2 times enhancement of S (at room temperature) due to both multivalence bands' participation in electrical transport and the further enhancement of the density of states effective mass, which allows a sharp increase in the power factor. As a result, PF = 9.3 mu W cm(-1) K-2 was achieved at similar to 800 K for the Cu2Sn0.82In0.18Se2.7S0.3 sample. Besides, as large as 44% reduction of lattice thermal conductivity is obtained via intensified phonon scattering by In-doping-induced formation of multidimensional defects, such as Sn vacancies, dislocations, twin boundaries, and CuInSe2 nanoprecipitates. Consequently, a record high figure of merit of ZT = 1.51 at 858 K is acquired for Cu2Sn0.82In0.18Se2.7S0.3, which is 4.7-fold larger than that of pristine Cu2SnSe3. |
关键词 | thermoelectric Cu2SnSe3 energy band regulation phonon scattering multidimensional defects |
DOI | 10.1021/acsnano.1c03120 |
关键词[WOS] | LATTICE THERMAL-CONDUCTIVITY ; FIGURE ; MERIT |
收录类别 | SCI |
语种 | 英语 |
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 Natural Science Foundation[2008085MA18] |
项目资助者 | National Natural Science Foundation of China ; Anhui Provinical Natural Science Foundation |
WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
WOS类目 | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
WOS记录号 | WOS:000665748900119 |
出版者 | AMER CHEMICAL SOC |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/123419 |
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.Chinese Acad Sci, Inst Solid State Phys, Key Lab Photovolta & Energy Conservat Mat, HFIPS, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Nucl Energy Safety Technol, Hefei Inst Phys Sci, Hefei 230031, Anhui, Peoples R China |
推荐引用方式 GB/T 7714 | Ming, Hongwei,Zhu, Gaofan,Zhu, Chen,et al. Boosting Thermoelectric Performance of Cu2SnSe3 via Comprehensive Band Structure Regulation and Intensified Phonon Scattering by Multidimensional Defects[J]. ACS NANO,2021,15. |
APA | Ming, Hongwei.,Zhu, Gaofan.,Zhu, Chen.,Qin, Xiaoying.,Chen, Tao.,...&Jabar, Bushra.(2021).Boosting Thermoelectric Performance of Cu2SnSe3 via Comprehensive Band Structure Regulation and Intensified Phonon Scattering by Multidimensional Defects.ACS NANO,15. |
MLA | Ming, Hongwei,et al."Boosting Thermoelectric Performance of Cu2SnSe3 via Comprehensive Band Structure Regulation and Intensified Phonon Scattering by Multidimensional Defects".ACS NANO 15(2021). |
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