| Title |
Study of Enhanced Photovoltaic Performance with Optimized Electrolytes and Blocking Layer Formation |
| Authors |
Hee-Dae Park ; Bong-Hyun Joo ; Youl-Moon Sung |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2013.27.3.050 |
| Keywords |
Dye-Sensitized Solar Cells ; Blocking Layer ; TiO2 ; Rf Magnetron Sputtering ; Electrolyte |
| Abstract |
In this work, the effects of blocking layer and optimally fabricated electrolyte were investigated with respect to impedance and conversion efficiency of the cells.A layer of TiO2 less than ∼200nm in thickness, as a blocking layer, was deposited by rf sputtering onto the F:SnO2 (FTO) glass to be isolated from the electrolyte in dye-sensitized solar cells (DSCs). Also, optimum condition of electrolytes preparation for DSCs was investigated. 3-methoxyppropionitrie and redox pairs with LiI and I2 were used as solvents for fabrication of electrolyte. The electrochemical impedances of DSCs using this photo-anode were R1: 13.8, R2: 15.1, R3: 11.9 and Rh: 8.3Ω, respectively. The R2 impedance related by electron transportation from porous TiO2 to FTO showed lower than that of normal DSCs. The photo-conversion efficiency of prepared DSCs was 6.4% and approximately 1.3% higher than general one. |