Abstract
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 CuCrO 2 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.
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