Synergistic photovoltaic performance of DSSCs based on ZnO charge transport layers, counter electrodes and C. annuum and T. indica as natural dyes

초록

Twelve Dye-Sensitized Solar Cells (DSSCs), in terms of three categories, were designed and fabricated employing ZnO-based charge-transport layers, Capsicum annuum (C. annuum) and Tamarindus indica (T. indica) as natural dyes and, Graphite and PEDOT:PSS as counter electrodes. J-V curves and cell efficiencies (eta) of all DSSC combinations were measured. Among DSSCs in category-1 maximum and minimum eta of 1.25% and 0.47% were estimated for FTO/ZAN37/C. annuum(dye)/HSE/Graphite and FTO/ZAN37/T. indica (dye)/HSE/Graphite, respectively. In the case of category-2, the DSSCs FTO/ZAN55/T. indica (dye)/HSE/PEDOT:PSS showed 0.60% efficiency and FTO/ZAN55/T. indica (dye)/HSE/Graphite revealed as high as eta = 1.07%. Similarly, for category 3, the maximum eta = 1.71% and minimum eta = 0.32% were recorded for the DSSC's combinations; FTO/ZAN(SFM)/C. annuum(dye)/HSE/Graphite and FTO/ZAN(SFM)/C. annuum(dye)/HSE/PEDOT:PSS. Based on charge transporting layers, dyes, and counter electrodes, a synergistic effect was developed in each considered DSSC led to a mechanism of the solar power conversion process.

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