Abstract
Our current objective is to develop a pioneering system utilizing polyvinyl alcohol (PVA) as a host matrix for the Ta2O5 nanoparticles for shielding applications. The PVA-Ta2O5 films were obtained via casting and characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR), and a polarized optical microscope. XRD and FTIR analyses showed the incorporation of Ta2O5 nanoparticles in the PVA matrix and the change in the polymeric film structure. The optical bandgap energy of the PVA was affected by the inclusion of Ta2O5 nanoparticles and was investigated through Tauc's relation using the absorption data recorded from the ultraviolet–visible spectrophotometer. The direct/indirect bandgaps decreased from 5.37/4.51 eV to 3.52/2.24 eV for PVA undoped and PVA after doping with 5.7 % Ta2O5, respectively. Moreover, the refractive index of the polymer film increased from 1.9148 for pure PVA to 2.3347 after 5 % Ta2O5 was added to the PVA. Adding Ta2O5 nanoparticles to the PVA film improves PVA's optical parameters, qualifying it for use in many optical applications.
Published Version
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