Optimization of Liquid Crystal Concentration in the Dye-Sensitized Solar Cell for High Efficiency

In this paper we optimize the liquid crystal (LC) concentration in the polymer electrolyte for high power conversion efficiency (PCE) of the DSSC. We measured the PCE of the dye-sensitized solar cell (DSSC) as a function of the concentration rate of the liquid crystal, E7. The concentration of the LC has been mixed with 0, 5, 10, 15, and 20 wt% in the polymer electrolyte, respectively. In addition, we also measured current-voltage curve for measuring the fill factor of the DSSC in each concentration of the LC material. As a result, we found that the DSSC with 10 wt% of the LC concentration in polymer electrolyte can provide maximum PCE value for high photovoltaic performance in the experiment.