engleski

Activity assessment of photosensitive dyes anthocyanin, rhodamine B, ruthenium N3 and rhodamine B + anthocyanin mixture for application in solar cell

The activity of photosensitive dyes such as anthocyanin, ruthenium N3, rhodamine B and anthocyanin + rhodamine B mixture was analyzed for potential use in solar cells based on nanostructured porous TiO 2 and ZnO films. Anthocyanin was extracted from a dry hibiscus (Hibiscus sabdariffa) flower in ethanol. The commercial light-sensitive dye N3 is an organometallic ruthenium complex, while rhodamine B is an indicator used in chemical laboratories. The UV-Vis spectrum of extracted anthocyanin, selected dyes and their combinations (anthocyanin + rhodamine B) were determined. The photoanodes were prepared by depositing an oxide layer based on TiO 2 and ZnO nanoparticles and were heated in furnace for a total of 40 minutes at different temperatures. The graphite film was applied to the conductive side of the solar cells by spray method, and the cathodes were dried at 80 °C for 1 hour to remove the organic solvent and then heated in furnace at 250 °C for 30 minutes. The graphite films and oxide layers were analyzed by digital microscope. From the microscopic images, it can be seen that the TiO 2 film is not compact andhas visible cracks, while the ZnO film is also incompact, thinner and with smaller visible cracks. The solar cell efficiency of the open-circuit voltage (V oc ) and short-circuit current density (J sc ) were measured under simulated light (60 W) to obtain values of fill factor (FF) and conversion efficiency (ɳ). Considering all the calculated parameters, the N3 dye is the most suitable for use in solar cells. In general, the TiO 2 layer gave better results than the ZnO layer.

solar cells, photosensitive dyes, TiO 2 and ZnO nanoparticles, conversion efficiency, fill factor

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