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Natural dye-based photoelectrode for improvement of solar cell performance |
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| Authors: | Mridula Tripathi Ruby Upadhyay Ashutosh Pandey P K Dubey |
| Institution: | 1. Department of Chemistry, C.M.P. Degree College, University of Allahabad, Allahabad, India 2. Department of Chemistry, Motilal Nehru National, Institute of Technology, Allahabad, India 3. Department of Physics, Banaras Hindu University, Varanasi, India |
| Abstract: | In the present paper, photovoltaic studies of dye-sensitized solar cells (DSSCs) based on betacyanin/TiO2 and betacyanin/WO3–TiO2 have been done. The cell performances were compared through I–V curves and wavelength dependant photocurrent measurements for the two new types of DSSCs. The TiO2-coated DSSC showed the photovoltage and photocurrent of 300 mV and 4.96 mA/cm2, whereas the cell employing WO3–TiO2 photoelectrode showed the values 435 mV and 9.86 mA/cm2, respectively. The conversion efficiency of TiO2 based dye-sensitized solar cell was found to be 0.69 %, while WO3–TiO2-based cell exhibited a higher conversion efficiency of 2.2 %. The better performance of the WO3–TiO2 dye-sensitized solar cell photoelectrode is thought to be due to an inherent energy barrier at the electrode/electrolyte interface leading to the reduced recombination of photoinduced electrons. |
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