Optimizing thermoelectric properties of BiSe through Cu additive enhanced effective mass and phonon scattering
文献类型：期刊论文
| 作者 | Shen, Xing-Chen1,4,5; Zhang, Xiao2; Zhang, Bin2; Wang, Guo-Yu1,3 ; He, Jian4; Zhou, Xiao-Yuan2,5
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| 刊名 | RARE METALS
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| 出版日期 | 2020-07-17 |
| 页码 | 9 |
| 关键词 | Cu additives Phonon scattering Effective mass Texture Thermoelectric |
| ISSN号 | 1001-0521 |
| DOI | 10.1007/s12598-020-01491-5 |
| 通讯作者 | Zhou, Xiao-Yuan(xiaoyuan2013@cqu.edu.cn) |
| 英文摘要 | Known as a weak topological insulator (TI), BiSe structurally exhibits alternating stacks of quantum spin Hall bilayer ("Bi-2") and three-dimensional TI layer ("Bi2Se3"). The low lattice thermal conductivity of BiSe due to the presence of Bi(2)bilayers promises potentially good thermoelectric performance. Herein, the thermoelectric properties of nominal Bi1-xCuxSe samples were studied as the functions of the content of Cu additive and temperature. It is found that Cu additives in BiSe (1) profoundly affect the texture of densified polycrystalline samples by inclining the crystallographicc-axis parallel toward the pressure direction in the densification process, (2) increase considerably the effective mass and thus the Seebeck coefficient, and (3) yield point defects and Cu-Se secondary phases that effectively scatter heat-carrying phonons. As a result, the optimized electrical and thermal properties yield a thermoelectric figure of merit ofzT similar to 0.29 in Bi1-xCuxSe (x = 0.03) sample at 467 K in parallel to the pressure direction and azT similar to 0.20 at 468 K in the perpendicular direction. Graphic abstract |
| 资助项目 | Graduate Scientific Research and Innovation Foundation of Chongqing, China[CYB 19064] ; National Natural Science Foundation of China[51772035] ; National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[51472036] ; National Natural Science Foundation of China[51672270] ; Fundamental Research Funds for the Central Universities[106112017CDJQJ308821] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH016] ; CSC Scholarship[201806050180] ; 2019 ITS Summer Fellowship ; Natural Science Foundation of Chongqing, China[cstc2019jcyj-msxmX0554] ; Chongqing University |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000549669500003 |
| 出版者 | NONFERROUS METALS SOC CHINA |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/11341]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Zhou, Xiao-Yuan |
| 作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 2.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100044, Peoples R China 4.Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA 5.Chongqing Univ, Coll Phys, Chongqing Key Lab Soft Condensed Matter Phys & Sm, Chongqing 401331, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Xing-Chen,Zhang, Xiao,Zhang, Bin,et al. Optimizing thermoelectric properties of BiSe through Cu additive enhanced effective mass and phonon scattering[J]. RARE METALS,2020:9. |
| APA | Shen, Xing-Chen,Zhang, Xiao,Zhang, Bin,Wang, Guo-Yu,He, Jian,&Zhou, Xiao-Yuan.(2020).Optimizing thermoelectric properties of BiSe through Cu additive enhanced effective mass and phonon scattering.RARE METALS,9. |
| MLA | Shen, Xing-Chen,et al."Optimizing thermoelectric properties of BiSe through Cu additive enhanced effective mass and phonon scattering".RARE METALS (2020):9. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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