Royal Society of Chemistry, RSC Advances, 93(4), p. 51374-51380, 2014
DOI: 10.1039/c4ra07908f
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This work reports on a study of regeneration kinetics of organic dyes with pyridine ring group sensitized NiO electrodes in combination with iodide-based and organic thiolate-based electrolytes by scanning electrochemical microscopy (SCEM) with a feedback model. These dyes have showed promising performance in p-type dye-sensitized solar cells. The investigation reveals that the anchoring group affects the effective rate constant, showing an efficient dye-regeneration process for the dye with carboxylic acid anchoring groups. Meanwhile, it is worth noting that the regeneration process between the reduced dye and the oxidized state of the thiolate-based electrolyte is much faster than that of the iodide-based electrolyte.