Theoretical and Experimental Aspects of Current and Future Research on NbO2 Thin Film Devices

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Music, DenisMalmö universitet,Malmö University,Institutionen för materialvetenskap och tillämpad matematik (MTM),Materials Science (författare)

Theoretical and Experimental Aspects of Current and Future Research on NbO2 Thin Film Devices

Artikel/kapitelEngelska2021

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2021-02-22
MDPI AG,2021

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LIBRIS-ID:oai:lup.lub.lu.se:cdae942d-5a4e-47a1-adb8-edf4263a2ecf
https://lup.lub.lu.se/record/cdae942d-5a4e-47a1-adb8-edf4263a2ecfURI
https://doi.org/10.3390/cryst11020217DOI
https://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-40840URI

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Språk:engelska
Sammanfattning på:engelska &svenska

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The present research front of NbO2 based memory, energy generation, and storage thin film devices is reviewed. Sputtering plasmas contain NbO, NbO2, and NbO3 clusters, affecting nucleation and growth of NbO2, often leading to a formation of nanorods and nanoslices. NbO2 (I41/a) undergoes the Mott topological transition at 1081 K to rutile (P42/mnm), yielding changes in the electronic structure, which is primarily utilized in memristors. The Seebeck coefficient is a key physical parameter governing the performance of thermoelectric devices, but its temperature behavior is still controversial. Nonetheless, they perform efficiently above 900 K. There is a great potential to improve NbO2 batteries since the theoretical capacity has not been reached, which may be addressed by future diffusion studies. Thermal management of functional materials, comprising thermal stress, thermal fatigue, and thermal shock, is often overlooked even though it can lead to failure. NbO2 exhibits relatively low thermal expansion and high elastic modulus. The future for NbO2 thin film devices looks promising, but there are issues that need to be tackled, such as dependence of properties on strain and grain size, multiple interfaces with point and extended defects, and interaction with various natural and artificial environments, enabling multifunctional applications and durable performance.
The present research front of NbO2 based memory, energy generation, and storage thin film devices is reviewed. Sputtering plasmas contain NbO, NbO2, and NbO3 clusters, affecting nucleation and growth of NbO2, often leading to a formation of nanorods and nanoslices. NbO2 (I41/a) undergoes the Mott topological transition at 1081 K to rutile (P42/mnm), yielding changes in the electronic structure, which is primarily utilized in memristors. The Seebeck coefficient is a key physical parameter governing the performance of thermoelectric devices, but its temperature behavior is still controversial. Nonetheless, they perform efficiently above 900 K. There is a great potential to improve NbO2 batteries since the theoretical capacity has not been reached, which may be addressed by future diffusion studies. Thermal management of functional materials, comprising thermal stress, thermal fatigue, and thermal shock, is often overlooked even though it can lead to failure. NbO2 exhibits relatively low thermal expansion and high elastic modulus. The future for NbO2 thin film devices looks promising, but there are issues that need to be tackled, such as dependence of properties on strain and grain size, multiple interfaces with point and extended defects, and interaction with various natural and artificial environments, enabling multifunctional applications and durable performance.

Ämnesord och genrebeteckningar

NATURVETENSKAP Fysik hsv//swe
NATURAL SCIENCES Physical Sciences hsv//eng
NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
NbO2
thin films
sputtering
density functional theory
electrical properties
thermal properties
mechanical properties
NbO2

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Krause, Andreas M.Malmö universitet,Malmö University,Institutionen för materialvetenskap och tillämpad matematik (MTM)(Swepub:mau)ak0673 (författare)
Olsson, PärMalmö universitet,Malmö University,Lund University,Lunds universitet,Mekanik,Institutionen för maskinvetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Mechanics,Department of Mechanical Engineering Sciences,Departments at LTH,Faculty of Engineering, LTH,Institutionen för materialvetenskap och tillämpad matematik (MTM),Division of Mechanics, Lund University(Swepub:mau)tspaol (författare)
Malmö UniversityInstitutionen för materialvetenskap och tillämpad matematik (MTM) (creator_code:org_t)

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Ingår i:Crystals: MDPI AG11:22073-4352

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Av författaren/redakt...: Music, Denis; Krause, Andreas ...; Olsson, Pär

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NATURVETENSKAP: NATURVETENSKAP; och Fysik

NATURVETENSKAP: NATURVETENSKAP; och Fysik; och Den kondenserade ...

Artiklar i publikationen: Crystals

Av lärosätet: Lunds universitet; Malmö universitet

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