Dye-Sensitized Solar Cells Using Fifteen Natural Dyes as Sensitizers of Nanocrystalline TiO2

Abstract

In this study, dye-sensitized solar cells were fabricated using TiO 2 as a semiconducting layer dyed with natural extracts. Thin layers of nanocrystalline TiO 2 were deposited on transparent Fluorine doped tin oxide (FTO) conductive glass using doctor blade method. Fifteen natural dyes were examined as photosensitizers of the TiO 2 layer. The absorption spectra of the natural extracts were performed. The J-V characteristic curves of all fabricated cells were measured and analyzed. The parameters related to the cell performance were presented. Moreover, the impedance spectroscopy of two cells was investigated.