This may block the physical contact between the electrolyte and Tio2. Hence, the reduction in efficiency will occur [24]. Hence, to minimize this aggregation, capping agent is needed. The SEM image of pre dye treated Tio2 shown in Fig. 5(b), presents the improvement in morphology as nearly spherical particles and reduction in cluster formation. This can be interpreted as the natural dye takes an additional role of a capping agent in the pre dye treated Tio2 nano particles. Hence, the mixing of natural dye during synthesis itself by modified sol-gel process has yielded uniform adsorption of dye molecules on Tio2 surface and reduced the dye aggregation to a great extent.