and the efficiency is significantly improved to 1.05% in pre dye treated Tio2 based DSSC. The modified sol-gel process yielding pre dye treated TiO2 nano particles is a promising methodology in terms of more dye adsorption, less dye aggregation and improved And the natural dye extract of P marsupium stem bark is a potential dye sensitizer for environmental friendly DSscs for harvesting solar energy. Therefore, this can be effectively adopted for the fabrication of DSSCs with higher efficiency