A preliminary study on structural and optical properties of heat treated NB2O5 nanostructure
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Date
2023-01Author
Salim, Evan T.
Saimon, Jehan A.
Abood, Marwa K.
Alsultany, Forat H.
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Show full item recordAbstract
Annealing is a heat treatment that alters the physical and sometimes chemical properties of
a material to improve their crystalline structure and other important properties. This work
presents the effect of post heat treatment on optical, structural, morphological, and surface
roughness of Nb2O5 thin films at different temperatures (200-700oC) which to the best of our
knowledge not been extensively studied yet. A clear modification in surface morphology and
other studied properties was obtained. XRD results show a significant enhancement in the
film’s structural properties such as a reduction in the dislocation densities and stress. The
optical properties of the treated films show a clear decrease in the transmission and energy
gap values which their values were found to reduce from (4.35 to 2.9) eV with heat treatment
up to 600oC and re-increase at 700oC. The surface roughness was also enhanced as a result
of increasing the grain size from (9.95 – 34.7) nm Finally, SEM images of the films show an
obvious change in their morphology and an increase in film uniformity as a result of heat
treatment. Therefore, heat treatment could be considered as a helpful method to control film
characteristics. Main result should be presented quantitatively