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- W2062380075 abstract "We have fabricated Dye Sensitised Solar Cells (DSSCs) using only water as the solvent and guanidinium iodide–iodine as the redox couple that operate at 4% energy efficiency under 1-sun illumination. This result is ∼5 times higher than the best previously reported values. We show that it is critical to facilitate the wetting of water electrolytes into the mesoporous TiO2 dye films, especially when using hydrophobic dyes. We show chenodeoxycholic acid to be a good surfactant for this purpose. By separate variation of iodide and iodine concentrations in series of cells we show that the optimum concentrations for water based DSSCs are quite different from those used in organic electrolytes. We argue that this is due to the much lower stability constant of tri-iodide in water, relative to organic solvent. Finally we also vary the TiO2 thickness and pore structure to achieve the above stated efficiency." @default.
- W2062380075 created "2016-06-24" @default.
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- W2062380075 date "2012-01-01" @default.
- W2062380075 modified "2023-10-12" @default.
- W2062380075 title "Managing wetting behavior and collection efficiency in photoelectrochemical devices based on water electrolytes; improvement in efficiency of water/iodide dye sensitised cells to 4%" @default.
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- W2062380075 doi "https://doi.org/10.1039/c2jm35245a" @default.
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