PERFORMANCE ENHANCEMENT OF MAGNETIC BEADS-GRAPHENE OXIDE-TiO2 COMPOSITE FILM ON ZnO NANOWIRES FOR DSSCs

PERFORMANCE ENHANCEMENT OF MAGNETIC BEADS-GRAPHENE OXIDE-TiO2 COMPOSITE FILM ON ZnO NANOWIRES FOR DSSCs

Dye-sensitized solar cells (DSSCs) were fabricated using photoanodes made from zinc oxide nanowires (ZNWs)/grapheneoxide (GO) - titanium dioxide (TiO2) composite film. In this study, we used magnetic beads (MBs) to modify double layer structure.DSSC based on ZNWs/MBs (0.25 mL)-GO-TiO2 composite photoelectrode exhibited a high energy conversion efficiency (η) of4.46%, compared with a DSSC based on ZNWs/GO-TiO2 composite photoelectrode (3.53%), accompanied by incrementshort-circuit photocurrent. According to the experiment result, which could be attributed to the high specific surface area of MBs.The effects of GO and MBs for photovoltaic performances of the DSSC were investigated by field emission scanning electronmicroscopy (FE-SEM), solar simulator, UV-visible spectrometer and electrochemical impedance spectroscopy (EIS).