Abstract: The present research work is based on the studies of various nanocomposites and their I-V characterization for solar applications. Copper oxide (Cu2O) were synthesized and used, to prepare nanocomposites using titanium dioxide (TiO2) and GO. The composites have been synthesized in different ratios by applying simple mechanical stirring followed by ultra sonication. In this work, Cu2O nanoparticles were prepared under microwave irradiation by our reported method which further used, to prepare copper oxide nanocomposite thin films. The prepared nanocomposites were further characterized using scanning electron microscopy and the current–voltage (I–V) characteristics of the thin films of Cu2O /TiO2 and Cu2O /TiO2 / GO nanocomposite were investigated. Various characteristics such as fill factor (FF), short circuit current (Isc), open-circuit photo-voltage (VOC), and efficiencies () were measured for all the nanocomposites. The efficiencies of various ratios of Cu2O /TiO2 and Cu2O /TiO2/GO viz. 1:3, 1:1:1, 1:2:1 and 1:3:1 were found to be 1.98%, 1.16%, 1.45% and 1.55% respectively. During investigation it was found that Cu2O /TiO2/ GO nanocomposite with the ratio of 1:3 showed better efficiency ( as compared to other ratios.