| Title |
Experimental Investigation on High Efficient Electrolytes of Electrochemical Photovoltaic Cells |
| Authors |
김두환(Kim, Doo-Hwan) ; 한치환(Han, Chi-Hwan) ; 성열문(Sung, Youl-Moon) |
| DOI |
https://doi.org/10.5370/KIEE.2011.60.1.100 |
| Keywords |
Electrochemical photovoltaic cells ; Dye-sensitized solar cell ; Electrolyte ; Photovoltaic ; Oxidation ; Reduction |
| Abstract |
In this work, an optimum condition of electrolytes preparation for photovoltaic cells application was investigated experimentally in terms of impedance and conversion efficiency of the cells. 3-methoxyppropionitrie and redox pairs with LiI and I_2 were used as stable solvents for fabrication of electrolyte. Efficiency comparison of the prepared cells carried out for various additives and ionic liquids. From the results, there was an optimum concentration (about 0.3 M) of ionic liquids for efficient cell fabrication. For case of electrolyte using single DMAp additive, the maximum conversion efficiency of the cell was 6.4%(V_{oc}: 0.78V, J_{sc}: 14.4 mA/cm^2, ff: 0.57). For case of electrolyte using both DMAp and CEMim additives, the maximum conversion efficiency of the cell was 7.2%(V_{oc}: 0.79V, J_{sc}: 16 mA/cm^2, ff: 0.57). From the result of electrochemical impedance measurement, both Z1 and Z3 values of binary additives-based cell decreased compared to those of single additive-based. This is due to the decreased in internal and charge transfer resistivities of the cells. |