Abstract
Abstract
Combined theoretical and experimental investigations are carried out to achieve an optimum photovoltaic (PV) conversion performance (η) of a DSSC. All theoretical studies are done in tiberCAD software, wherein simulated parameters are calibrated and correlated with the measured experimental parameters of a DSSC fabricated using nearly spherical shape nanosize TiO2 working electrode. For two types of dye molecules, theoretically optimized electrode’s thicknesses were 6 μm (η ∼ 6.45%) and 18 μm (η ∼ 7.51%) for DB and LEG4 dyes, respectively. Relatively a better short-circuit photocurrent density (JSC) was found for a LEG4 dye although it had a lower light absorbance compared to a DB dye. The theoretical investigation revealed that charge recombination of a DB dye is 7 times higher than that of a LEG4 dye, and this high recombination becomes one of the most critical factors affecting the overall incident photon to current conversion efficiency.
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