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Effects of Sb Deviation from Its Stoichiometric Ratio on the Micro-and Electronic Structures and Thermoelectric Properties of Cu12Sb4S13

文献类型：期刊论文

作者Huang, Lulu1,4; Kong, Yuan1,4; Zhang, Jian1; Zhu, Chen1,4; Zhang, Jinhua1,3,4; Li, Yuanyue2; Li, Di1; Xin, Hongxing1; Wang, Zhaoming1; Qin, Xiaoying1
刊名ACS APPLIED MATERIALS & INTERFACES
出版日期2020-03-25
卷号12
关键词Cu12Sb4S13 thermoelectric performance power factor density of states Rietveld refinements
ISSN号1944-8244
DOI10.1021/acsami.0c00094
通讯作者Zhang, Jian(zhangjian@issp.ac.cn) ; Li, Di(lidi@issp.ac.cn) ; Qin, Xiaoying(xyqin@issp.ac.cn)
英文摘要Thermoelectric material tetrahedrite Cu12Sb4S13 has attracted much attention because of its intrinsic low lattice thermal conductivity, excellent electrical transport property, and environment-friendly constituents. However, its thermoelectric figure merit, ZT, is limited because of the low Seebeck coefficient (S) and power factor (PF). Hence, it is indispensable to enhance its S and PF to increase its ZT. Here, we show that when Sb deviation from its stoichiometric ratio in the Cu12Sb4S13 band structure is modulated, it gives rise to increased density of states and enhancement of the Seebeck coefficient. Moreover, carrier 300 490 500 600 700 T (K) concentration is tuned by changing sulfur and copper vacancies through controlling the Cu3Sb4S4 phase with an atomic ratio of Sb, leading to increased electrical conductivity. In addition, as large as similar to 60% reduction of lattice thermal conductivity is obtained by intensified phonon scattering using an impurity phase/element and vacancy-like defects induced by different Sb contents. As a result, a high ZT = 0.86 is achieved at 723 K for the Cu12Sb4+delta S13 sample with (delta = 0.2, which is similar to 50% larger than that of stoichiometric Cu12Sb4S13 studied here, indicating that ZT of Cu12Sb4S13 can be improved through simple modulation of the Sb stoichiometric ratio.
WOS关键词THERMAL-CONDUCTIVITY ; PERFORMANCE ; TETRAHEDRITES ; SUBSTITUTION ; TRANSITION ; FIGURE ; COPPER ; MERIT
资助项目National Natural Science Foundation of China[51972307] ; National Natural Science Foundation of China[51672278] ; National Natural Science Foundation of China[11674322] ; Ministry of Science and Technology of China[2017YFA0204904]
WOS研究方向Science & Technology - Other Topics ; Materials Science
语种英语
WOS记录号WOS:000526552100058
出版者AMER CHEMICAL SOC
资助机构National Natural Science Foundation of China ; Ministry of Science and Technology of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/103657]  
专题中国科学院合肥物质科学研究院
通讯作者Zhang, Jian; Li, Di; Qin, Xiaoying
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
2.Qingdao Univ, Coll Microtechnol & Nanotechnol, Qingdao 266071, Peoples R China
3.Natl Univ Def Technol, State Key Lab Pulsed Power Laser Technol, Hefei 230037, Peoples R China
4.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式
GB/T 7714		 Huang, Lulu,Kong, Yuan,Zhang, Jian,et al. Effects of Sb Deviation from Its Stoichiometric Ratio on the Micro-and Electronic Structures and Thermoelectric Properties of Cu12Sb4S13[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12.
APA Huang, Lulu.,Kong, Yuan.,Zhang, Jian.,Zhu, Chen.,Zhang, Jinhua.,...&Qin, Xiaoying.(2020).Effects of Sb Deviation from Its Stoichiometric Ratio on the Micro-and Electronic Structures and Thermoelectric Properties of Cu12Sb4S13.ACS APPLIED MATERIALS & INTERFACES,12.
MLA Huang, Lulu,et al."Effects of Sb Deviation from Its Stoichiometric Ratio on the Micro-and Electronic Structures and Thermoelectric Properties of Cu12Sb4S13".ACS APPLIED MATERIALS & INTERFACES 12(2020).

入库方式： OAI收割

来源：合肥物质科学研究院

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