Preparation of nanostructure mixed copper-zinc oxide via co-precipitation rout for dye-sensitized solar cells: The influence of blocking layer and Co(II)/Co(III) complex redox shuttle |
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| Affiliation: | 1. Nanotechnology Laboratory, Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran;2. Department of Electrical Engineering, University of Isfahan, Isfahan 81746-73441, Iran;1. Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Florida State University, Tallahassee, FL, United States;2. National High Magnetic Field Laboratory, Tallahassee, FL, United States;3. Integrative NanoScience Institute, Florida State University, Tallahassee, FL, United States;1. Water and Wastewater Research Center (WWRC), Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran;2. Department of Physical Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran |
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| Abstract: | Mixed copper-zinc oxide nanostructures (average size 43 nm) were effectively fabricated via co-precipitation route. Field-emission scanning electron microscope (FESEM), powder X-ray diffraction (XRD), fourier-transform infrared spectroscopy (FT-IR) and UV–vis diffuse reflectance spectrum (DRS) were used to characterize the properties of the oxides. At the optimized condition, copper-zinc oxide nanostructures were used for fabrication of working electrodes by doctor blade technique on the fluorine-doped tin oxide (FTO) in dye sensitized solar cells. Their photovoltaic behavior were compared with standard using D35 dye and an electrolyte containing [Co(bpy)3](PF6)2, [Co(pby)3](PF6)3, LiClO4, and 4-tert-butylpyridine (TBP). The ranges of short-circuit current (Jsc) from 0.13 to 0.30 (mA/cm2), open-circuit voltage (Voc) from 0.20 to 0.51 V, and fill factor from 0.34 to 0.29 were obtained for the DSSCs made using the working electrodes. A titania blocking layer on the copper-zinc oxide surface improve both the open-circuit voltage (Voc), short-circuit current (Jsc) and the power-conversion efficiency is consequently enhanced by a factor of approximately five. |
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| Keywords: | Copper-zinc oxide nanostructure Dye-sensitized solar cell (DSSC) Co-precipitation Co(II)/Co(III) shuttle |
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