Optical and Microstructural Evolution of GO-CdS Nanocomposites for Optoelectronic Applications

Abstract

With contemplation of the importance of graphene-induced nanocomposites in diverse technological applications, in this study, GO-CdS nanocomposites are developed by integrating cadmium sulfide (CdS) nanoparticles with graphene oxide (GO) through a facile wet chemical method. The structural, morphological, chemical, and optical characteristics of composite were extensively investigated by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, and UV–visible absorption spectroscopy. The XRD examination confirmed the successful formation of GO and GO-CdS nanocomposite. The FESEM micrographs revealed a uniform distribution of CdS nanoparticles on the wrinkled GO nanosheets, demonstrating strong interactions between the components. The FTIR spectra exhibited a substantial reduction in oxygen-containing functional groups, and the existence of Cd:S bonds confirmed the successful integration of CdS into the GO matrix. The UV–visible spectroscopy demonstrated the enhanced optical absorption in GO-CdS nanocomposite, with a redshift in absorption edge, signifying charge transfer between GO and CdS. Attained results recommend that the GO-CdS nanocomposites exhibit enhanced structural, chemical, and optical properties, making it a capable material for applications in photodetectors, and solar cells.