Optical Features of PVC Polymer Thin Films Doped by Compound Organosilane to Raise the Absorbance of Samples Driven to the Light

Abstract The novel work for this study is to make new films for the pure and doped PVC with organosilane thus it was used organosilane moieties (25 mg) were mixed with poly(vinyl chloride) (5 g). Thus drop-casting procedure was utilized to make these thin films. The pure PVC and PVC-Organosilane optical properties were studied under the wavelength range from (250–1300 nm) using diffusive reflectance equipment. The optical properties like absorption increased up to (87–95%), while reflectance and transmittance decreases when added organosilane molecules. Furthermore, the dielectric constant (real and imaginary) and optical conductivity enhanced, respectively. On the other hand, Urbach energy increases when adding organosilane to PVC structure, furthermore, skin depth, refractive index, and optical density were figured. The energy gap is reduced from 4 eV to 2.3 eV for the direct transition and from 3.9 eV to 1.6 eV for the indirect transition. SEM analysis was implemented over thin films of pure PVC and PVC-Organosilane to see the morphology of these surfaces. The AFM analysis was utilized to exhibit the topography of the surfaces. Thereby, finding the surface roughness and the root means square of the surface for these thin films. The improvement for these thin films is used in many applications such as photostability and absorption the light when used in radars applications.