Abstract
ZnO-nanowire-based dye-sensitised solar cells (DSSCs) were prepared to investigate the effect of microfluidic electrolyte on the photovoltaic performance of solar cells. At first, long and well-aligned ZnO nanowires were synthesised on FTO substrate via the improved hydrothermal method. The structure and crystallinity properties of ZnO nanowires were characterised by using SEM, TEM and XRD. The photovoltaic characteristics of the assembled DSSCs were measured under various flowrates of microfluidic electrolyte. The results showed that variations of the microfluidic electrolyte had little effect on the fill factor of the cells. However, the photocurrent and photovoltage of the solar cells exhibited systematic changes with the decrease of microfluidic electrolyte: the short-circuited current of the DSSCs decreased while the open-circuit voltage increased. The phenomenon could remain in some extent after cessation of injecting the electrolyte within a short time. The possible influencing mechanism of the microfluidic electrolyte on the photovoltaic performance was discussed.
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