FABRICATION OF DYE SENSITIZED SOLAR CELL

Dye-sensitized solar cells combine the unique properties of both inorganic and organic compounds. They are potential alternatives for present day p-n junction photovoltaic devices. In this work fabrication of a dye-sensitized solar cell using Black Berry fruit extract as a natural organic dye and TiO semiconductor nanoparticles synthesized through sol- 2 gel method has been reported. Graphite was used as a counter electrode and potassium iodide was used as a charge carrier in the cell. Light form the sun excites the electrons of the organic dye that is coordinated to TiO and the electrons are then 2 injected into TiO nanocrystals. The electrons then flow from TiO coated electrode, through the load and back to the 2 2 Graphite counter electrode. The counter electrode then donates electrons to the dye completing the circuit. SEM images of synthesized TiO nanoparticles had an average size of 65 nm. An efficiency of 33.45% has been achieved by using Black 2 Berry fruit extract as the dye.