Figure 5 shows the current-voltage characteristics of DSSCs employing various polymer gel electrolytes
including nanocomposite gel electrolytes. All electrical properties of DSSCs are listed in Table 2. It is seen that the
cell employing LE shows the efficiency of 3.02%. While, the efficiency of cell fabricated using ILE is 3.49% which
is slightly increase due to the ILE was higher conductivity. Moreover, the efficiency of DSSCs fabricated using
10wt% PVDF-HFP/PVA (8:2wt%) gel electrolyte was 3.26% which the higher than that of LE. For the
nanocomposite gel, it was found that the efficiency of DSSC tended to decrease with increasing contents of TiO2
and SiO2 nanoparticles. This may be due to the higher viscosity of polymer gels and harder transportation of ionic
species after addition of nanoparticles into polymer gel electrolyte. With addition of 0.25 wt% TiO2 and 0.5 wt%
SiO2 nanoparticles into such blend electrolytes, the efficiencies of DSSCs employed such nanocomposite gels are
found to decrease to be 2.71% and 3.03%, respectively.