فهرست نشریات علمی دسترسی آزاد ایران

The current study uses the casting method to make PMMA/ZnSe/Si nanocomposites and then looks at their structural and optical properties. From the XRD, it found the nature amorphas for the PMMA and with additive high loading (7 wt.%) for the ZnSe and Si NPs, the nature amorphas for the PMMA convert to the polycrystalline. The Field Emission Scanning Electron Microscopy (FESEM) analysis showed that the ZnSe and Si nanoparticles were uniformly distributed throughout the PMMA matrix polymers. The images taken with an optical microscope showed the growth of network pathways for charge carriers within the polymeric matrix. These pathways got stronger as the number of nanoparticles increased. The PMMA/ZnSe/Si nanocomposites have better optical qualities and can absorb more UV light. Because of this behavior, the nanocomposites might be useful in optoelectronics. The optical properties of nanocomposites, like their absorbance, attenuation coefficient, refractive index, real and imaginary dielectric constants, and optical conductivity, get better as the amounts of ZnSe and Si nanoparticles used rise. This nanocomposites’ transmittance, on the other hand, goes down as the number of nanoparticles goes up. The optical energy gap for allowed indirect transitions drops from 4.4 eV to 3.2 eV at a concentration of 7 wt.%. For banned indirect transitions, it drops from 4.3 eV to 3.1 eV. The narrowing of the energy band gap is very good for many fields that use optical devices.