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 magnetronsputtering onto heated glass and carbon substrates. Elemental compositions were inferred fromRutherford 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 ∼0.45 at. % Si enhanced the bandgap even more.
Place, publisher, year, edition, pages
2013. Vol. 103, no 16, 161907- p.
Condensed Matter Physics Engineering and Technology
Research subject Engineering Science with specialization in Solid State Physics
IdentifiersURN: urn:nbn:se:uu:diva-210015DOI: 10.1063/1.4826444ISI: 000326148700032OAI: oai:DiVA.org:uu-210015DiVA: diva2:660446