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High thermoelectric...
High thermoelectric power factor of pure and vanadium-alloyed chromium nitride thin films
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- Gharavi, Mohammad Amin, 1985- (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten,Linköpings universitet, Tunnfilmsfysik
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- Gambino, Davide, 1991- (author)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Linköpings universitet, Teoretisk Fysik
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- Le Febvrier, Arnaud, Assistant Professor, 1986- (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten,Linköpings universitet, Tunnfilmsfysik
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- Eriksson, Fredrik, 1975- (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten,Linköpings universitet, Tunnfilmsfysik
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- Armiento, Rickard, 1976- (author)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Linköpings universitet, Teoretisk Fysik
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- Alling, Björn, 1980- (author)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Linköpings universitet, Teoretisk Fysik
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- Eklund, Per, Docent, 1977- (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska fakulteten,Linköpings universitet, Tunnfilmsfysik
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(creator_code:org_t)
- ELSEVIER, 2021
- 2021
- English.
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In: Materials Today Communications. - : ELSEVIER. - 2352-4928. ; 28
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Chromium-nitride based materials have shown unexpected promise as thermo-electric materials for, e.g., wasteheat harvesting. Here, CrN and (Cr,V)N thin films were deposited by reactive magnetron sputtering. Thermoelectric measurements of pure CrN thin films show a low electrical resistivity between 1.2 and 1.5 x 10(-3) Omega cm and very high values of the Seebeck coefficient and thermoelectric power factor, in the range between 370-430 mu V/K and 9-11 x 10(-3) W/mK(2), respectively. Alloying of CrN films with small amounts (less than 15 %) of vanadium results in cubic (Cr,V)N thin films. Vanadium decreases the electrical resistivity and yields powerfactor values in the same range as pure CrN. Density functional theory calculations of sub-stoichiometric CrN1-delta and (Cr,V)N1-delta show that nitrogen vacancies and vanadium substitution both cause n-type conductivity and features in the band structure typically correlated with a high Seebeck coefficient. The results suggest that slight variations in nitrogen and vanadium content affect the power factor and offers a means of tailoring the power factor and thermoelectric figure of merit.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Transition-metal nitrides; Sputter deposition; Thermoelectrics; Density functional theory; Energy harvesting
Publication and Content Type
- ref (subject category)
- art (subject category)
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Gharavi, Mohamma ...
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Gambino, Davide, ...
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Le Febvrier, Arn ...
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Eriksson, Fredri ...
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Armiento, Rickar ...
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Alling, Björn, 1 ...
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Eklund, Per, Doc ...
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- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Materials Engine ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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Materials Today ...
- By the university
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Linköping University
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Uppsala University