| Summary: | The natural colorants extracted from flowers of Chrysanthemums and Dianthus barbatus were used as sensitizers in the making of dye-sensitized solar cells (DSSCs). The FTO-coated transparent substrate was used. The nanoparticles of TiO2 (P25) were applied as a semiconductor for photoanode. The Chrysanthemums flower extracted colorant UV-Vis spectrum showed extensive absorption peaks at 411, 428 nm, and 663 nm in the visible region. The absorption peak was observed at 336 nm in the spectrum for the Dianthus barbatus flowers extracted colorant. The optical band gap was calculated using Tauc’s relation i.e. 2.66 and 3.10 eV for Chrysanthemums and Dianthus barbatus flowers colorant, respectively. The photovoltaic properties were studied with redox electrolyte NaI and KI with I2 in acetonitrile solvent. The fabricated solar cells show good photovoltaic properties. The dyes have good prospects as a low-cost and environmentally friendly alternative to costly synthetic dyes and metal complexes-based sensitizers which are frequently used in DSSCs. © 2021, Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma. All rights reserved.
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