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  Charge carrier concentration optimization of thermoelectric p-type half-Heusler compounds

Rausch, E., Balke, B., Deschauer, T., Ouardi, S., & Felser, C. (2015). Charge carrier concentration optimization of thermoelectric p-type half-Heusler compounds. APL Materials, 3(4): 041516, pp. 1-8. doi:10.1063/1.4916526.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-DC2C-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-1C93-7
Genre: Journal Article

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 Creators:
Rausch, Elisabeth1, Author              
Balke, Benjamin2, Author
Deschauer, Torben2, Author
Ouardi, Siham3, Author              
Felser, Claudia4, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Siham Ouardi, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863439              
4Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: The carrier concentration in the p-type half-Heusler compound Ti0.3Zr0.35Hf0.35CoSb1-xSnx was optimized, which is a fundamental approach to enhance the performance of thermoelectric materials. The optimum carrier concentration is reached with a substitution level x = 0.15 of Sn, which yields the maximum power factor, 2.69 x 10(-3) Wm(-1)K(-2), and the maximum ZT = 0.8. This is an enhancement of about 40% in the power factor and the figure of merit compared to samples with x = 0.2. To achieve low thermal conductivities in half-Heusler compounds, intrinsic phase separation is an important key point. The present work addresses the influence of different preparation procedures on the quality and reproducibility of the samples, leading to the development of a reliable fabrication method. (C) 2015 Author(s).

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Language(s): eng - English
 Dates: 2015-042015-03-30
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000353828400023
DOI: 10.1063/1.4916526
 Degree: -

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Title: APL Materials
Source Genre: Journal
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Publ. Info: AIP Scitation
Pages: - Volume / Issue: 3 (4) Sequence Number: 041516 Start / End Page: 1 - 8 Identifier: CoNE: /journals/resource/2166-532X