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Keywords:

  • dye-sensitized solar cell;
  • ferrocyanide redox couple;
  • aqueous electrolyte;
  • energy conversion;
  • organic and inorganic dyes
Thumbnail image of graphical abstract

Solar energy conversion efficiencies of over 4% have been achieved in DSCs constructed with aqueous electrolytes based on the ferricyanide–ferrocyanide redox couple, thereby avoiding the use of expensive, flammable and toxic solvents. This paradigm shift was made possible by the use of a hydrophobic organic carbazole dye.