Molten and solid metal-iodide-doped trialkylsulphonium iodides and polyiodides as electrolytes in dye-sensitized nanocrystalline solar cells |
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| Authors: | Hel ne Paulsson, Malin Berggrund, Eva Svantesson, Anders Hagfeldt,Lars Kloo |
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| Affiliation: | a Department of Chemistry, Inorganic Chemistry, Royal Institute of Technology, Stockholm S-100 44, Sweden;b Department of Analytical Chemistry, Uppsala University, Box 579, Uppsala S-751 23, Sweden;c Department of Physical Chemistry, Uppsala University, Box 599, Uppsala S-751 24, Sweden |
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| Abstract: | The conductivity and solar cell performance of metal-iodide-doped trialkylsulphonium iodides and polyiodides have been investigated as electrolytes in dye-sensitized nanocrystalline solar cells (DNSCs). Nine different metal-iodide-containing (R2R′S)I with additional iodine provided overall solar-to-electric energy conversion efficiencies of over 2%, while used as electrolytes in DNSCs in simulated AM 1.5 solar light at the light intensity of 100 W m−2. The highest overall conversion efficiency, 3.1%, was achieved by using the electrolyte (Bu2MeS)I:AgI:I2 in the proportions (1:0.03:0.05). The effects from 4-tert-butylpyridine treatment of the electrodes were studied. The effects of metal-iodide doping were also investigated with respect to speciation in the electrolytes and potential influence on electrochemical conductivity. |
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| Keywords: | Electrolyte Room-temperature molten salt Metal iodide Trialkylsulphonium iodide Dye-sensitized nanocrystalline solar cell |
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