Abstract
In this study, we investigated the photovoltaic efficiency of DSSC (Dye Sensitized Solar Cell) using five different organic dyes extracted from natural sources namely Gomphrena globosa, Syzygium cumini (fruit and leaf), Crocus sativus, Caesalpinia sappan and Rubia cordifolia. Commercially obtained TiO2 powder, coated over the conducting glass substrate was used as the photo anode and the same coated with carbon soot was used as the photo cathode. UV spectrophotometer and photoluminescence spectrophotometer were used to characterize the dyes to find their absorption and emission maxima respectively. X-Ray diffractometer was used to characterize the TiO2 electrode film. SEM analysis was also carried out to study the surface morphology. The life and efficiency of DSSC can be improved by studying the dye absorption process and the thickness, size and shape of TiO2 coating. Thus, low cost solar cells can be developed with significant power conversion efficiency.Key words: TiO2, DSSC, natural dyes, ITO glass slides, carbon soot, sintering.
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