Characterization of Eight Natural Dyes as Synthesizer for Dye-Sensitized Solar Cells Technology

In the present work, dye-sensitized solar cells (DSSCs) were fabricated by using natural dye extracted from eight different flowers namely: [(MN۱) Turkish Hibiscus sabdariffa, (MN۲) Iraqi Hibiscus sabdariffa, (MN۳) Rosehips, (MN۴) Lavandula, (MN۵) Nerium oleander, (MN۶) Red Bougainvillea, (MN۷) Pomegranate flower, and (MN۸) Pink Bougainvillea] extracts as a photosensitizer. The UV-Vis absorption spectra for all eight samples were recorded at room temperature by using a mixture of ۰.۱ mol.L−۱ HCl and ethanol, and also in different solvents. In addition, the effect of the pH value of these dyes on absorbance were investigated. Moreover, the Fourier transform infrared (FT-IR) spectra of all dyes were recorded. The lamp power used to evaluate the DSSCs performance is ۱۰۰۰ W/m۲. The power conversion efficiency (η) of extracted dyes was reached as follows: (MN۱) =۱.۵۸۹ %, (MN۲) =۱.۲۲۹ %, (MN۳) =۰.۶۰۲ %, (MN۴) = ۰.۹۲۷ %, (MN۵) =۰.۶۸۴ %, (MN۶) =۱.۳۱۷ %, (MN۷) =۱.۰۵۹ %, and (MN۸) =۱.۱۴۹ %.

Keywords:

Dye , sensitized solar cells Natural dyes TiO۲