EFFECT OF NANO-TiO_2 ON PROPERTIES OF PVDF/PMMA QUASI-SOLID ELECTROLYTES FOR DYE-SENSITIZED SOLAR CELLS

摘要

The quasi-solid electrolytes based on PVDF/PMMA/TiO_2 blend polymer were prepared by soaking a porous membrane in an organic electrolyte solution containing the I~-/(I_3)~- redox couple. The introduction of the TiO_2 nanoparticles into the polymer matrix caused morphological changes to the host polymer structure. Moreover, the dispersion method and the amount of TiO_2 nanoparticles added in polymer were studied. It was found that the addition of TiO_2 nanoparticles enhanced not only the conductivity and the diffusion performance of triiodide in the quasi-solid-state PVDF/PMMA based gel electrolyte, but also the photovoltaic performance of the corresponding quasi-solid-state DSSCs.