Synthesis and fabrication of dye-sensitized solar cell using Delonix regia flower dye

Abstract

The dye-sensitized solar cell is a hybrid solar cell it is a third-generation photo-electrochemical solar cell that shows good potential low-cost cost technology because of the large availability of ingredient material and its nontoxic nature its highly acceptable by human society, the flexibility of DSSC gives the edge to the commercialization of this product. In this work Dye-sensitized solar cell based on TiO2 Nano rods is done by a coating of compact layer on fluorine-doped glass in spin coater latter TiO2 Nano rods are grown up on the compact layer by the hydrothermal process at 150℃and let it cool to room temperature and then the same sample is annealed at 450℃ we called it photo anode. Natural dye is extracted from Delonix Regia flower by grinder and centrifuge to avoid solid impurity. To fabricate the device photo anode and Nickel-based counter electrode which was pressed and sonicated in ethanol for removing impurities. To oxidize the dye, we use electrolytes made up of Potassium Iodide, Iodine crystal. In this work of The energy conversion efficiency is evaluated as 0.17 % as a maximum value so far, the latest efficiency reported on dye-sensitized solar with Delonix Regia flower was 0.1% with carbon as counter electrode in the year of 2021. The improved solar cell characteristic open circuit voltage Voc =0.3244 V, short circuit current Jsc=1.89 mA, and energy conversion efficiency η=0.17%, compact layer of TiO2 on fluorine-doped glass subtract enhance the adherences of Nano rods by extracting natural dye it ensures the high absorbance level which result in higher efficiency, Potassium Iodide, Iodine crystal, and Ethylene Glycol mixture on propionate amount mixed which regenerate the oxidized dye to ground state to complete the cycle of regeneration. Key words: Dye sensitized solar, TiO2 Nano rods, hydrothermal process, Delonix Regia, Potassium Iodide, Iodine crystal