Bandgap widening in thermochromic Mg-doped VO2 thin films: Quantitative data based on optical absorption
2013 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 103, no 16, 161907- p.Article in journal (Refereed) Published
Thermochromic Mg-doped VO2 films were deposited by reactive direct current magnetron sputtering onto heated glass and carbon substrates. Elemental compositions were inferred from Rutherford backscattering. Optical bandgaps were obtained from spectral transmittance and reflectance measurements-from both the film side and the back side of the samples-and ensuing determination of absorption coefficients. The bandgap of Mg-doped films was found to increase by 3.9 +/- 0.5 eV per unit of atom ratio Mg/(Mg + V) for 0 < Mg/(Mg + V) < 0.21. The presence of similar to 0.45 at. % Si enhanced the bandgap even more.
Place, publisher, year, edition, pages
2013. Vol. 103, no 16, 161907- p.
Absorption co-efficient, Atom ratio, Carbon substrates, Direct current magnetron sputtering, Elemental compositions, Quantitative data, Spectral transmittance, Thermo-chromic
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-134570DOI: 10.1063/1.4826444ISI: 000326148700032ScopusID: 2-s2.0-84886380180OAI: oai:DiVA.org:kth-134570DiVA: diva2:667641
FunderSwedish Research Council
QC 201311272013-11-272013-11-252013-11-27Bibliographically approved