INVESTIGATION OF DYE-REGENERATION KINETICS AT DYE-SENSITIZED p-TYPE CuCrO2 FILM/ELECTROLYTES INTERFACE WITH SCANNING ELECTROCHEMICAL MICROSCOPY
The power conversion efficiency of p-type dye-sensitized solar cells (DSSC) is determined by the kinetics of hole injection and dye-regeneration reaction at the dye/electrolyte interface. In this work, the photochemical regeneration kinetics of dye adsorbed on CuCrO2 mesoporous film was investigated by using scanning electrochemical microscopy with feedback mode. Organic P1 and C343 sensitizers in combination with iodide-based and thiolate-based electrolytes were selected to understand the effect of sensitizers and redox shuttles on dye-regeneration process. A fast regeneration kinetic rate constant was confirmed in thiolate-based sample compared with iodide-based electrolyte, indicating that the organic redox shuttle was an efficient mediator to optimize the performance of p-type DSSC. Dye-regeneration kinetics on CuCrO2 mesoporous film can be investigated by scanning electrochemical microscopy with feedback mode. Various organic sensitizers in combination with iodine-based and thiolate-based electrolytes are used to understand the effect of sensitizers and redox shuttles on regeneration process.
GETACHEW ALEMU et al
Source: http://nanochemistry.blogspot.com/2014/07/investigation-of-dye-regeneration.html
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