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Thermochromic fenestration with VO2-based materials: Three challenges and how they can be met
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.ORCID iD: 0000-0002-8279-5163
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2012 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 520, no 10, 3823-3828 p.Article in journal (Refereed) Published
Abstract [en]

Thermochromic VO2-based films have higher infrared transmittance below a "critical" temperature tau(c) than above this temperature and can be used for regulating the solar energy transmittance T-sol in energy efficient windows. Pure VO2 is not practical, though, since (i) the modulation of T-sol is too small at tau(c), (ii) the luminous transmittance is too low, and (iii) tau(c) is too high. This paper discusses how these three challenges can be met. Specifically, using VO2-based nanoparticle composites rather than films makes it possible to significantly alleviate (i) and (ii), Mg doping of VO2 can give further improvements of (ii), and W doping (and to some extent also Mg doping) is important for (iii) and can bring tau(c) to a comfort temperature. The paper hence delineates a path towards practically useful thermochromic fenestration. 

Place, publisher, year, edition, pages
2012. Vol. 520, no 10, 3823-3828 p.
Keyword [en]
Thermochromism, Vanadium dioxide, Thin film, Smart window, Energy efficiency
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
Identifiers
URN: urn:nbn:se:uu:diva-174594DOI: 10.1016/j.tsf.2011.10.053ISI: 000302973400024OAI: oai:DiVA.org:uu-174594DiVA: diva2:528300
Conference
7th International Symposium on Transparent Oxide Thin Films for Electronics and Optics (TOEO-7), March 14-16, 2011, Tokyo, Japan
Available from: 2012-05-24 Created: 2012-05-22 Last updated: 2017-12-07Bibliographically approved

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Li, ShuyiNiklasson, Gunnar A.Granqvist, Claes-Göran

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