The document summarizes research on the effects of aging time of a silicon oxide (SiOx) sol-gel solution on the properties of nano crystalline silicon thin films produced using the sol-gel method. Nano silicon powders were mixed into a sol-gel of tetraethylorthosilicate and ethanol. The silicon dioxide films synthesized from this sol-gel were studied in terms of optical properties like refractive index by varying the aging time and annealing temperatures. The composition of the resulting SiOx films was found to vary from 1.1 to 2.0 as aging time increased. Characterization techniques like Raman spectroscopy, XRD, AFM and SEM were used to study the chemical composition, crystallinity and morphology of the