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One of the main and determining components of dye-sensitized solar cells (DSSCs) is the pigment, which is one of the most important features of a good pigment to absorb more input photons, or in other words, its wider absorption spectrum.  Because the process of electron transfer in a pigmented solar cell is based on photoelectrochemical mechanisms and its simulation model is like photosynthesis in plants, so the use of a natural pigment with a high absorption spectrum can be effective in addition to environmental compatibility. Significantly increase cell efficiency. This study used natural fruit extracts of Dutch jasmine, five-leaf ivy, Cactus Apontia, Acacia, and Mahogany. Titanium dioxide nanoparticles were applied on a transparent conductive substrate by Dr. Blade's coating method. The optical properties of natural dye extracts were investigated by UV-Vis spectroscopy. The crystal structure and morphological properties of TiO₂ electrodes were analyzed by XRD and FESEM, respectively. The results of the current-voltage characterization show that due to the anthocyanin of the Holandi jasmine pigment (with ethanol solvent) and the interaction between the anthocyanin of hydroxyl groups and the TiO₂ surface, this sensor has the best photovoltaic performance and is more efficient among Natural colors are tested. Also, the values ​​of short circuit current density, open-circuit voltage, filling factor, and efficiency for this cell were 12.35 mA / cm2, 721 mV, 0.5, and 4.45, respectively. The results of this study indicate a simple and feasible method with minimal facilities for fabricating dye-sensitized solar cells.

Keywords: Natural dyes, Anthocyanin, TiO2, Dye-sensitized solar cell (DSSC), Photovoltaic

     

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