Photoanode Thickness and Sensitization Time Effects on Overall Performance of Nanocrystalline TiO2 Based Solar Cell Sensitized with Roselle Flower Extracts.

Abstract

Semiconducting anode layer thickness and anode sensitization time are two major factors that can affect the overall responses of dye sensitized solar cells. By setting these fabrication parameters at different levels, different DSSCs were fabricated at different experimental conditions. FTO conductive glasses were used as substrates and counter electrode fabrication and Roselle flower extract was the chosen as sensitizer. Each cell was illuminated with constant light intensity of 1 Sun (100mW/cm2) A.M 1.5 to determine the photovoltaic responses. A maximum conversion efficiency and fill factor obtained are 0.3220% and 0.7501 respectively. Hence, optimum values of the two parameters investigated favour performance of dye-sensitized solar cells.