Morphological, structural and optical properties of MoO2 films electrodeposited on SnO2∣glass plate

• Authors: Nijole Dukstiene , Dovile Sinkeviciute , Asta Guobiene
• Languages of publication: EN

Abstracts

EN

MoO2 films were prepared by electrodeposition under potential controlled conditions from an aqueous alkaline solution of sodium molybdate. Optical microscopy showed that films of different morphology were deposited. The surface roughness and grain size were determined by atomic force microscopy. The characterization of as-deposited films by X-ray diffraction analysis revealed their amorphous nature. The optical constants of films were derived from transmittance spectra recorded in the 310–1100 nm wavelength range. All films were highly absorptive and showed a direct band to band transition. From the absorption edge data, the values of the optical band gap E g and the Urbach energy E U were determined based on Tauc’s model. The influence of film thickness on the extinction coefficient k, refractive index n, absorption coefficient a and the band gap energy E g was studied. [...]

Keywords

EN

MoO2 film; Morphology; Transmittance spectra; Tauc model; Optical constants

• Journal: Open Chemistry
• Year: 2012
• Volume: 10
• Issue: 4
• Pages: 1106-1118

Dates

published

1 - 8 - 2012

online

29 - 5 - 2012

Contributors

author

Nijole Dukstiene

• Department of Physical Chemistry, Faculty of Chemical Technology, Kaunas University of Technology, LT-50254, Kaunas, Lithuania,

author

Dovile Sinkeviciute

• Department of Physical Chemistry, Faculty of Chemical Technology, Kaunas University of Technology, LT-50254, Kaunas, Lithuania

author

Asta Guobiene

• Institute of Materials Science, Kaunas University of Technology, LT-50131, Kaunas, Lithuania

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Identifiers

DOI

10.2478/s11532-012-0012-7