Journal
SILICON
Volume 9, Issue 2, Pages 201-210Publisher
SPRINGER
DOI: 10.1007/s12633-016-9413-0
Keywords
Organic acid additives; Tungsten trioxide; Surface morphology; DC electrical conductivity
Funding
- Sophisticated Test and Instrumentation Centre (STIC), Cochin University, Cochin
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Tungsten trioxide (WO3) thin films were prepared incorporating various organic acid additives by the sol-gel spin coating technique. They were characterized by X-ray diffraction (XRD), UV-Visible analysis, scanning electron microscopy (SEM) and dc electrical conductivity. From XRD, the crystal phase, average grain size and structural parameters of WO3 thin films were found to vary owing to different water dissolved organic acid additives. The variation of optical conductivity and band gap energy was calculated from the UV-Visible analysis. The SEM studies revealed that the organic acids influenced the surface morphology of the microsized plates of tungsten oxides. The electrical conductivity at various temperatures correlated with the average grain size of the nanocrystallites of WO3 thin films.
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