The DSSC containing the dye mixture exhibits the best performance with a short-circuit current density of 2.63 mA cm−2, open-circuit voltage of 0.47 V, fill factor of 0.58 and the highest photo-conversion efficiency of 0.72% under the illumination of 100 mW cm−2 white light. Under illumination of lower light intensity of 60 mW cm−2 and 30 mW cm−2,
the fill fraction enhanced from 0.58 to 0.59 and 0.60 and the photo-conversion efficiency increased from 0.72% to 1.11% and 1.85% respectively