Some physical properties of Nb2O5 thin films prepared using nobic acid based colloidal suspension at room temperature

This work presents the successful preparation of niobium pentoxide micro structures thin films at room temperature. A chemical colloidal suspension was deposited employing Spin coating method. Nb2O5 thin films were prepared at two different thicknesses before and after ultrasonic vibration processes. Optical, structural, and morphological properties were studied. An enhanced crystalline structure with bigger grain size at both thicknesses was obtained after ultrasonic process; this was ensured by SEM results. The energy gap of the prepared films was estimated and found to be about (2.81, 2.42) eV for (T1 = 325 nm) and (2.59, 2.32) eV at the second thickness (T2 = 425 nm). The I-V characteristic study of prepared heterojunction on silicon substrate show an increase in the rectification ratio after the ultrasonic vibrational process for both thicknesses.