The optical properties behavior of modify poly(methyl methacrylate) nanocomposite thin films during solar energy absorption

Herein, nanoparticles (Co3O4, Cr2O3, CuO, and TiO2) doped PMMA were fabricated via casting method. The PMMA nanocomposite thin films have been prepared with a fixed concentration of 4 g from PMMA to make PMMA thin films, they were modified with amine cluster. These thin films were doped by a fixed concentration, 0.01 gm, of various nanomaterials (Co3O4, Cr2O3, CuO, and TiO2) to make the nanocomposite thin films of PMMA. The thin film samples were examined by UV-Visible wavelength between (250-1350 nm). The optical properties, optoelectronic features, and oscillator strength were investigated. The reflectance and transmittance values were decreased for all the nanocomposite thin films of PMMA. The absorption coefficient ranged between (99.8-92.0%) for all samples. The direct energy gap decreased from 4.65 eV for the blank PMMA and it with Co3O4 to 2.10 eV, also, for the indirect energy gap decreased from 4.2 eV for the blank PMMA and it with Co3O4 to 2.8 eV due to the modified and doped PMMA. The optoelectronic features such as dielectric of high frequency and effective mass increased, oscillator strength decreased, dispersion energy and effective energy of single oscillator increased in comparison to blank PMMA. The oscillator strength for these thin films were increased also. These nanocomposite thin films are suitable to enhance the photostability performance from UV light and drastic weather are needed especially for underwater, aerospace, and applications for air transport, in addition, fabricated shields from UV energy, light-emitting diodes, lasers sensors, memory devices, harvesting light, and converting-light devices.