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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 6Article 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
Keyword [en]
energy gap, light absorption, nanostructured materials, photoacoustic, spectroscopy, thin films, tungsten compounds, augmented-wave method, tungsten-oxide, energy
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-19208DOI: 10.1063/1.3313945ISI: 000274516900023ScopusID: 2-s2.0-76749121539OAI: diva2:337255
Swedish Research Council
QC 20110126Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-01-26Bibliographically approved

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Baldissera, GustavoPersson, Clas
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