A polyfluoroalkyl imidazolium ionic liquid as iodide ion source in dye sensitized solar cells

We report on the use of a fluorinated imidazolium ionic liquid as a source of iodide ions in solvent-based electrolytes for DSSCs. Efficient dye regeneration and fast charge transport in the fluorinated electrolyte result in an overall improvement of the device performances compared to conventional hydrogenated ionic liquids.

A fluorinated ionic liquid (FIL) has been used as a source of iodide ions in solvent based electrolytes for DSSCs. The FIL improves the charge transfer dynamics at the TiO2-dye/electrolyte interface and the transport in the electrolyte solution.Figure optionsDownload as PowerPoint slideHighlights
► Fluorinated ionic liquid.
► Iodide ions diffusion in fluorocarbon–hydrocarbon solution.
► Charge transfer dynamics at organic–inorganic interface.