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Optical band-gap determination of nanostructured WO3 film
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2010 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 96, no 6, 061909- p.Article in journal (Refereed) Published
Abstract [en]

The optical band-gap energy of a nanostructured tungsten trioxide film is determined using the photoacoustic spectroscopy method under continuous light excitation. The mechanism of the photoacoustic signal generation is discussed. The band-gap energy is also computed by other methods. The absorption coefficient as well as the band-gap energy of three different crystal structures of tungsten trioxide is calculated by a first-principles Green's function approach using the projector augmented wave method. The theoretical study indicates that the cubic crystal structure shows good agreement with the experimental data.

Place, publisher, year, edition, pages
2010. Vol. 96, no 6, 061909- p.
Keyword [en]
energy gap, light absorption, nanostructured materials, photoacoustic spectroscopy, thin films, tungsten compounds
National Category
Condensed Matter Physics Engineering and Technology
URN: urn:nbn:se:uu:diva-137870DOI: 10.1063/1.3313945ISI: 000274516900023OAI: diva2:378640
Available from: 2011-09-29 Created: 2010-12-16 Last updated: 2015-06-24Bibliographically approved

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Niklasson, Gunnar A.Granqvist, Claes Göran
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Solid State Physics
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