The present work aims to design new structures of polystyrene (PS)/zinc sulfide(ZnS)/ silicon bromide(SiBr4) composites to utilize in various electronics and optical nanodevices have unique characteristics like excellent optical and electronic properties with low cost compared to other structures. The structural, electronic and spectral characteristics of PS/ZnS/SiBr4 composites were studied. The optical and electronic characteristics were included the total energy, HOMO/LUMO energies, electronegativity, energy gap, ionization energy, electron affinity, electronic softness, electron density, electrophilic index, dipole moment, density of states, electrostatic surfaces potential and polarizability, UV- spectrum, Raman spectrum, IR-Spectrum and NMR. The results indicated to the PS/ZnS/SiBr4 composites have excellent optoelectronics characteristics and energy gap about 2.12 eV which made it can be considered as promising materials to use in different photonics and optics nanodevices.