University of Kashan Journal of Nanostructures 2251-7871 3 4 2013 12 01 Synthesis and Characterization of Graphene-ZnO Nanocomposite and its Application in Photovoltaic Cells 453 459 5932 10.7508/jns.2013.04.010 EN F. S. Ghoreishi Dept. of Nanotechnology Engineering, Tarbiat Modares University, Tehran, Iran V. Ahmadi Dept. of Electrical & Computer Engineering, Tarbiat Modares University, Tehran, Iran M. Samadpour Dept. of Physics, K.N.Toosi University of Technology, Tehran, Iran Journal Article 2014 07 22 In this paper, we present a simple method for preparation of graphene-ZnO nanocomposites (G-ZnO). The method is based on thermal treatment of the graphene oxide (GO)/ZnO paste which reduces the graphene oxide into the graphene and leads to the formation of the G-ZnO nanocomposite. The structure, morphology and optical properties of synthesized nanocomposites are characterized with XRD, FESEM, FTIR and Raman spectroscopies. Here CdS quantum dots are deposited on G-ZnO nanocomposite structure and is integrated as a photoanode in CdS quantum dot sensitized solar cells (QDSSCs). Photovoltaic properties of CdS QDSSC based on bare ZnO nanoparticles and G-ZnO nanocomposite photoanodes are studied here. The cell with G-ZnO/CdS photoanode shows two times higher photoelectric conversion efficiency than that of the pure ZnO photoanode (0.94 vs. 0.45). https://jns.kashanu.ac.ir/article_5932_90ba403efcbb699f1fdeaf00ac826382.pdf