| 초록 |
Dye-sensitized solar cells (DSCs) generate the electricity from the sun light at the interfaces between the dye-sensitized semiconductor oxides and the redox couples. The dye cation formed by injection of electron into TiO2 should be regenerated by the redox couples for the photoelectrochemical cycles. In this system, the redox couples can interact with injected electrons and dye cations for the recombination and regeneration, respectively. Therefore, it is essential to understand the reaction kinetics of the I3-/I- redox couples in the device. Here, we propose that the introduction of a sodium bis (2-ethylhexyl) sulfosuccinate (AOT)/water system to the I3-/I- electrolyte enables the control of the total and local concentration of the redox couples, which achieves a high power conversion efficiency of ~11% for ~1000 h. This novel concept assists in the enhancement of dye-regeneration efficiency and the reduction of recombination rate, developing highly efficient DSCs. |
