铝纳米颗粒掺杂对PVA复合薄膜结构和光学性能的影响

Composite films consisting of polyvinyl alcohol (PVA) are integrated with a varying amounts of aluminum nanoparticles (Al NPs) (0.0, 0.04, 0.08, 0.1wt%). The samples are produced using the casting technique. The composite films are synthesized to achieve a good optical and electrical properties for optoelectronic photonic device applications such as solar cells and energy storage applications. Structural analysis is done using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The XRD analysis reveals the complete dissolving of Al Nps in the PVA matrix and a reduction in its crystallinity (Xc) from 43 to 22% with the increase of Al NPs concentration. The FTIR spectra indicated significant changes within the 1100–500 cm −1 range upon the correlation of Al NPs with PVA due to the formation of cross-link between Al NPs and oxygen atom in PVA. Additionally, high-resolution transmission electron microscopy (HRTEM) is done to determine the distribution and the average size of nanoparticles in polymeric films, the HRTEM reveals the indexed planes of Aluminum (Al) crystalline lattice. Ultraviolet–visible (UV–Vis) spectroscopy is done to investigate the optical properties of the samples. The results show that the electronic transition in the samples is indirect transition. The indirect optical energy gap is slightly changed as the Al NPs concentration increased, while the refractive index increases from 2.2 to 5.9 as the Al NPs concentration increased.