Effects of different electrolytes of dye sensitized solar cells (DSSC) on the photovoltaic parameters were studied by electrochemical impedance spectroscopy (EIS). Copper (II) phthalocyanine (CuPc), Copper iodide (CuI) and 1-Methyl-3-propylimidazolium iodide (IL) were used as solid
electrolytes. TiO2 semiconductor photoanode was synthesized by sol–gel method using urea as nitrogen source. The prepared TiO2 was characterized by N2 adsorption–desorption isotherm, X-ray diffraction (XRD), Raman and Fourier Transform Infra-Red
(FTIR) spectroscopy, Scanning Electron Microscopy (SEM), High Resolution Transmission electron microscopy (HRTEM) and Ultraviolet-Visible absorption spectroscopy. It was observed that open circuit voltage (V
oc), short circuit current density (J
factor (FF) and conversion efficiency (η) decreases with using p-type semiconductor electrolyte and increases by using IL. Our results confirmed that it is essential to use low-viscosity iodide melts with smaller cations to achieve high-efficiency dye-sensitized solar cells. Electrochemical
impedance spectroscopy (EIS) results indicate that the use of 1-Methyl-3-propylimidazolium iodide might passivate the surface recombination sites and increases the electron lifetime in the nanostructured TiO2 film, resulting in the improvement of the cell efficiency. The order of
the activity of the electrolytes is IL > CuPc > CuI. The conversion efficiency was found to be 0.15, 0.88, and 1.47% for copper iodide, copper phthalocyanine and 1-Methyl-3- propylimidazolium iodide, respectively.
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Dye Sensitized Solar Cells;
Open Circuit Potential;
Document Type: Research Article
Egyptian Petroleum Research Institute, 1-Ahmed El-Zomr St., P.O.Box 11727, Nasr City, Cairo, Egypt
Leibniz-Institut für Katalyse E. V. Albert-Einstein-Straße 29a, 18059 Rostock, Germany
Publication date: June 1, 2017
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