Fabrication, optical behavior and structural properties of PVA/MgO hybrid materials for optical devices
摘要
In this study, Polyvinyl alcohol (PVA) and magnesium oxide (MgONPs) were successfully combined to fabricate the flexible (PVA/MgO) nanocomposite films using the solution casting preparation method. The XRD, EDX, SEM, contact angle and UV visible spectroscopy, were used for analysis of these films. The XRD and EDX demonstrated the successful synthesis of the PVA/MgO nanocomposites. Furthermore, the SEM images demonstrate that the MgO nanoparticles are evenly distributed across the nanocomposite. Additionally, optical parameters of PVA and PVA/MgO films were measured at wavelengths between 200 and 2200 nm. The band gap energy drops from 5.84 eV for PVA respectively to 5.67 eV, 5.52 eV, and 5.39 eV, by varying MgO to 1.5%, 3%, and 4.5%. Also, the absorption edge decreased from 5.36 eV for PVA, respectively to 5.27, 5.15, and 4.94 eV. The surface wettability was determined, by measuring the contact angle. The polar surface energy reduced from 16.04 mJ/m2 for PVA to 12.35 mJ/m2 for the PVA/4.5%MgO, while the dispersive energy decreased from 37.28 to 27.13 mJ/m2. The results indicated the structural, surface and optical characteristics for the PVA/MgO nanocomposites were modified, allowing them to be used in optoelectronic.