In this work, the effect of solvent on the photovoltaic properties of Methyl Red (MR) dye and C-60 based device has been reported. It can be assumed for a dye based photovoltaic device that there is an effect of solvent on the film morphology which controls the charge transport mechanism. To observe this effect of solvent on the film morphology two different solvents namely chlorobenzene and toluene are used to prepare the solutions of MR and C-60. The devices made with chlorobenzene and toluene solvents are termed as chlorobenzene cell and toluene cell respectively. For each solvent different devices are prepared by varying the weight ratio of MR and C-60. These cells are characterized through different photovoltaic measurements. Experimental data reveal that the photovoltaic response is higher in case of chlorobenzene cell than that of the toluene cell. The power conversion efficiency for toluene cell for a particular concentration of MR:C-60 is 0.781x10(-7) whereas for chlorobenzene cell it is 1.026x10(-5). Maximum V-oc and J(sc) obtained for toluene cell are 19.5 mV and 33.73 nA/cm(2) whereas for chlorobenzene cell these are 720 mV and 158.0 nA/cm(2) respectively. Scanning electron microscope images indicate the difference in nano-morphology and cluster sizes between the cells. The cluster size is quite large in case of toluene cell with comparison to chlorobenzene cell. From the transient photocurrent measurement it is observed that the charge transport process is quite faster in chlorobenzene cell which prevents excess recombination resulting in a higher efficiency in chlorobenzene cell. (C) 2012 Elsevier B. V. All rights reserved.