Dye-sensitized solar cells using dyes extracted from flowers, leaves, parks, and roots of three trees

In this paper, eleven natural dyes were collected from three trees and used as photosensitizers for dye sensitized solar cells (DSSCs). The cells were fabricated using TiO2 as a semiconducting layer deposited on transparent fluorine doped tin oxide (FTO) conductive glass using doctor blade method. The absorption spectra of the extracts were performed in the spectral range from 400 nm to 750 nm. The JV characteristic curves of all fabricated cells were measured and analyzed. The parameters related to the solar cell performance were determined. Moreover, the impedance spectroscopy of the cell with the best performance was investigated

الخلايا الصبغية باستخدام الصبغات الطبيعية

In this thesis, many dye sensitized solar cells were fabricated using as a semiconducting layer and natural dyes as photosensitizers. Thin layers of nanocrystalline were prepared on transparent fluorine doped tin oxide (FTO) conductive glass. Doctor blade method was used in the coating process. Twenty seven natural dyes were tried such as Bougainvillea, Passion Fruit, Clove, Carob, Black tea, Green tea, Basil flower, Mint flower, Henna tree, onions Peel, Royal Poinciana, Schinus Terebinthifolius, Eggplant Peel, Eggplant pulp, and others. The absorption spectra of these dyes were performed. The I-V characteristic curves of all fabricated cells were measured, plotted, and analyzed at different incident light intensities. The parameters related to the solar cell performance were presented such as the maximum absorption peak ( ), short circuit current ( ), open circuit voltage ( ),maximum power point ( ), fill factor (FF), and efficiency (η), where the absorption spectra of all dyes and the J-V characteristic curves of the fabricated cells were presented. The output power was calculated and plotted for each case. Also, short circuit current, open circuit voltage, maximum absorption wavelength, maximum power, fill factor, and power conversion efficiency were presented. Moreover, the impedance spectroscopy of the fabricated cells was investigated, more of the treatment on cells were studied, such as the effect of mordant, and using another semiconductor material with the three best dyes (fig leaves, schinus terebinthifolius leaves, and zizyphus leaves) and Ru complexcis-dicyano-bis(2,2’-bipyridyl-4,4’-dicarboxylic acid) ruthenium(II), Ruthenizer 505, ( Solaronix, Switzerland). The results revealed that the extract of plants leaves have the highest efficiency. The schinus terebinthifolius leaves is the best natural dye were used, has efficiency value of 0.78%, the mixture of ZnAl2O4 with TiO2 can increases the efficiency of cells

Research Article Dye-Sensitized Solar Cells Using Fifteen Natural Dyes as Sensitizers of Nanocrystalline TiO 2 Monzir S. Abdel-Latif Department of Chemistry, Islamic University …

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 JV 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