Solar Cells Sensitized with the Extracts of Hibiscus Sabdariffa and Rosa Damascena Flowers

Sofyan A Taya, Taher M El-Agez, Hussein A Al-Mogiar, Hatem S Ghamri, Monzir S Abdel-Latif

Abstract


Dye sensitized solar cells (DSSCs) based on natural dyes extracted from dried Hibiscus Sabdariffa and Rosa Damascena flowers were fabricated. The extracts were characterized by UV-Vis absorption spectroscopy. The TiO2 nanopowder paste was spread on FTO layers to form a thin layer. Three processes were conducted to improve the cell efficiency such as pre- and post-treatments of TiO2 and FTO layers with three acids and changing the pH of the extract solutions. The conversion efficiency of the DSSCs sensitized with Hibiscus Sabdariffa enhanced by 107% and 114% when treating the FTO sheets for 5 min with H3PO4 and HCl, respectively. It was observed that when HCl acid was used to adjust the pH value of the dye solution of Rosa Damascena to 2.0, the efficiency of the DSSC was enhanced by about 180%.

Keywords


dye sensitized solar cells; natural dyes; Hibiscus Sabdariffa; Rosa Damascena; TiO2

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References


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DOI (PDF): https://doi.org/10.20508/ijrer.v6i2.3166.g6835

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