气候变化领域集成服务门户(CCPortal): Mg3(Bi;Sb)2single crystals towards high thermoelectric performance

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DOI	10.1039/d0ee00838a
	Mg3(Bi;Sb)2single crystals towards high thermoelectric performance
	Pan Y.; Yao M.; Hong X.; Zhu Y.; Zhu Y.; Fan F.; Imasato K.; He Y.; Hess C.; Fink J.; Fink J.; Fink J.; Yang J.; Büchner B.; Büchner B.; Fu C.; Snyder G.J.; Felser C.
发表日期	2020
ISSN	1754-5692
起始页码	1717
结束页码	1724
卷号	13 期号:6
英文摘要	The rapid growth of the thermoelectric cooler market makes the development of novel room temperature thermoelectric materials of great importance. Ternary n-type Mg3(Bi,Sb)2 alloys are promising alternatives to the state-of-the-art Bi2(Te,Se)3 alloys but grain boundary resistance is the most important limitation. n-type Mg3(Bi,Sb)2 single crystals with negligible grain boundaries are expected to have particularly high zT but have rarely been realized due to the demanding Mg-rich growth conditions required. Here, we report, for the first time, the thermoelectric properties of n-type Mg3(Bi,Sb)2 alloyed single crystals grown by a one-step Mg-flux method using sealed tantalum tubes. High weighted mobility ∼140 cm2 V-1 s-1 and a high zT of 0.82 at 315 K are achieved in Y-doped Mg3Bi1.25Sb0.75 single crystals. Through both experimental angle-resolved photoemission spectroscopy and theoretical calculations, we denote the origin of the high thermoelectric performance from a point of view of band widening effect and electronegativity, as well as the necessity to form high Bi/Sb ratio ternary Mg3(Bi,Sb)2 alloys. The present work paves the way for further development of Mg3(Bi,Sb)2 for near room temperature thermoelectric applications. © The Royal Society of Chemistry.
语种	英语
scopus关键词	Bismuth metallography; Chemical bonds; Electronegativity; Grain boundaries; Photoelectron spectroscopy; Single crystals; Thermoelectric equipment; Thermoelectricity; Angle resolved photoemission spectroscopy; Grain boundary resistance; Theoretical calculations; Thermo-Electric materials; Thermoelectric application; Thermoelectric cooler; Thermoelectric performance; Thermoelectric properties; Yttrium compounds
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162709
作者单位	Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, Dresden, 01187, Germany; Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, Dresden, 01069, Germany; Materials Genome Institute, Shanghai University, 99 Shangda Road, Shanghai, 200444, China; State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China; Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, United States; Institute for Solid-State and Materials Physics, Technical University Dresden, Dresden, 01062, Germany
推荐引用方式 GB/T 7714	Pan Y.,Yao M.,Hong X.,et al. Mg3(Bi;Sb)2single crystals towards high thermoelectric performance[J],2020,13(6).
APA	Pan Y..,Yao M..,Hong X..,Zhu Y..,Zhu Y..,...&Felser C..(2020).Mg3(Bi;Sb)2single crystals towards high thermoelectric performance.Energy and Environmental Science,13(6).
MLA	Pan Y.,et al."Mg3(Bi;Sb)2single crystals towards high thermoelectric performance".Energy and Environmental Science 13.6(2020).