Optoelectronic properties in 2D GeC and SiC hybrids: DFT and many body effect calculations

Abstract

This work investigates optoelectronic properties of SiC- and GeC-hybrids that are still unexplored. Using DFT and many body effect calculations, we study, among others, charge density, dielectric functions, reflectivity and electron energy loss spectroscopy. The charge transfer determines the bonds nature between the atoms constituting the hybrids. A comparative study of gap and binding energy using different approximations is presented. The dielectric functions reveal strong excitonic effects. Two peaks related to p and p+s electron plasmons are observed in the spectra of loss energy. Moreover, the analysis of reflectivity shows that hybrids are transparent in the visible region. Other interesting findings are also detailed.