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  Mg3(Bi,Sb)2 single crystals towards high thermoelectric performance

Pan, Y., Yao, M., Hong, X., Zhu, Y., Fan, F., Imasato, K., et al. (2020). Mg3(Bi,Sb)2 single crystals towards high thermoelectric performance. Energy & Environmental Science, 13(6), 1717-1724. doi:10.1039/d0ee00838a.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-BB74-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-C26E-4
Genre: Journal Article

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Pan_Mg3.pdf (Publisher version), 4MB
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2020
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 Creators:
Pan, Yu1, Author              
Yao, Mengyu1, Author              
Hong, Xiaochen2, Author
Zhu, Yifan2, Author
Fan, Fengren1, Author              
Imasato, Kazuki2, Author
He, Yangkun1, Author              
Hess, Christian2, Author
Fink, Jörg1, Author              
Yang, Jiong2, Author
Buechner, Bernd2, Author
Fu, Chenguang1, Author              
Snyder, G. Jeffrey2, Author
Felser, Claudia3, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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Free keywords: CARRIER SCATTERING MECHANISM; THERMAL-CONDUCTIVITY; ZINTL COMPOUNDS; TRANSPORT; SBChemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology;
 Abstract: The rapid growth of the thermoelectric cooler market makes the development of novel room temperature thermoelectric materials of great importance. Ternary n-type Mg-3(Bi,Sb)(2)alloys are promising alternatives to the state-of-the-art Bi-2(Te,Se)(3)alloys but grain boundary resistance is the most important limitation. n-type Mg-3(Bi,Sb)(2)single crystals with negligible grain boundaries are expected to have particularly highzTbut 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 Mg-3(Bi,Sb)(2)alloyed single crystals grown by a one-step Mg-flux method using sealed tantalum tubes. High weighted mobility similar to 140 cm(2)V(-1)s(-1)and a highzTof 0.82 at 315 K are achieved in Y-doped Mg(3)Bi(1.25)Sb(0.75)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 Mg-3(Bi,Sb)(2)alloys. The present work paves the way for further development of Mg-3(Bi,Sb)(2)for near room temperature thermoelectric applications.

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Language(s): eng - English
 Dates: 2020-05-042020-05-04
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000544033100009
DOI: 10.1039/d0ee00838a
 Degree: -

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Title: Energy & Environmental Science
  Abbreviation : Energy Environ. Sci.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 13 (6) Sequence Number: - Start / End Page: 1717 - 1724 Identifier: ISSN: 1754-5692
CoNE: https://pure.mpg.de/cone/journals/resource/1754-5692