Effect of Surface Morphology on the Performance of Natural Dye Sensitized TiO2 Thin Film Solar Cell

Abstract

Nanocrystalline and flower like structured TiO2 thin films are prepared by sol-gel spin coating method. The prepared films are annealed at 450°C. Natural dyes are prepared from delonix regia flower and eugenia Jambolana fruit. The prepared natural dyes were sensitized into both nanocrystalline and flower like structured TiO2 thin films. The prepared solar cell was characterized by SEM, Uv-Vis spectroscopy and J-V characteristics. Conversion of solar light into electricity was successfully accomplished with both natural dye based solar cells. The best solar energy conversion efficiency (ƞ= 0.2%) was obtained for eugenia Jambolana dye sensitized flower like structured TiO2 thin film solar cell.