Abstract
A new kind of gel electrolyte containing only organic solvents and an iodide salt (3-methoxy propionitrile (MPN), aniline (AN) and AlI 3) is prepared. Based on a Lewis acid–base interaction between the ionic conductor AlI 3 and the organic solvent AN, gel formation is obtained. FTIR analysis of the AlI 3–AN hybrid shows changes in the peaks characteristic of the –NH 2 group and aromatic ring, verifying the formation of an AlI 3–AN complex. The photovoltaic performance of a quasi-solid state dye-sensitized solar cell with the AlI 3–MPN–AN gel electrolyte containing a 3/1 mole ratio of AN versus AlI 3 shows improvements when compared to the performance of a comparable solar cell using the AlI 3–MPN liquid electrolyte. This suggests that AN can act as an efficient electrolyte additive to enhance both of the photovoltaic performance and the long-term stability of the cell obviously.
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