Paper Title
One-Pot Solvothermal Synthesis and Characterization of Graphene/Cds Nanocomposites For Photovoltaic Applications

Abstract
Graphene-CdS (G-CdS) nanocomposites have successfully been synthesized by simple solvothermal route. The structural properties of the nanocomposites were characterized by Fourier transform infrared, X-ray diffraction and high resolution transmission electron microscope techniques. CdS was found to grow as nanotubes and crystallizes in wurtzite structure. CdS and G-CdS films were prepared by spin coating technique onto optical flat quartz substrates and InP substrates. The optical properties were investigated by spectrophotometric measurements over the spectral range 200-2500 nm. The optical band gap of the films was found to increase with increasing graphene content. The solar cells in the configuration of In/G-CdS/p-InP/Au:Zn were fabricated and compared with that the fabricated with pristine CdS. The current-voltage characteristics of the device were measured in dark and under illumination in which the basic diode parameters and photovoltaic parameters were estimated. The results indicated that the electrical conversion efficiency increases with increasing graphene content. Keywords- Graphene; CdS; Nanocomposites; Structural properties; Optical properties; Solar cells.