Structural Tailoring of V2O5 Thin Films via Solvent Additives in the Precursor Solution

Vanadium pentoxide (V2O5) thin films were synthesized using spray pyrolysis with three different solvent additives—methanol, acetone, and dimethylformamide (DMF)—in the precursor solution. The structural, molecular, and morphological properties of the films were characterized using X-ray diffraction (XRD), Fourier-transform Raman spectroscopy (FT-Raman), and scanning electron microscopy (SEM). Methanol-grown V2O5 thin films showed high crystallinity, and well-defined nanorods, while acetone and ethanol resulted in films with lower crystallinity and irregular nanostructures. DMF produced entirely amorphous films. This study provides a comprehensive understanding of how solvent additives influence V2O5 film quality, particularly for gas sensing applications.