| 초록 |
Solid state dye-sensitized solar cells (DSSCs) have shown the solar-to-electricity conversion efficiency up to 5% employing polymer electrolyte comprising poly(ethylene oxide) (PEO)/poly(ethylene glycol dimethylether) (PEGDME)/XI/I2 where X is Li, K and 1-methyl-3-propylimidazolium (MPI) cations. Those divergent cations in electrolyte had a large influence on the electron transfer across the mesoporous nanocrystalline TiO2 layer and thus on the overall energy conversion efficiency. It was suggested that the importance of the ionic diffusion on the electron recombination and the charge transfer rate at the counter electrode were arisen. Interestingly, the effects of the lifetime of electrons and the charge transfer resistance at the counter electrode side on the overall energy conversion efficiency in the solid state DSSCs were compensated each other, resulting in similar overall conversion efficiency. |
