Banana flowers are the source of anthocyanins that donate electrons to the active component of 2%. ZnO has high exciton binding and high electron mobility of 155-165 m2V−1s−1 compared to TiO2. In this study, the peak absorbance without tartaric acid 100:0% was at 451 nm and the addition of tartaric acid for 6% concentration 95/5 (v/v) experienced a wavelength shift of 543. The highest absorbance peak was at the dye solution with the variation in methanol and tartaric acid of 90:10% that was 545 nm. The addition of tartaric acid solvents successfully increased the conductivity of the natural dye causing the sample to have good sensitized properties so that could be applied as a photosensitizer. The conductivity values of the variation 100:0% were 0.5188 Q−1 m1 and 0.4922 Q−1 m1 in light and dark conditions, respectively. Then, the conductivity values of the variation 94:5 were 0.8806 Q−1 m1 and 0.8065 Q−1 m1 in the light and dark conditions, respectively. The highest conductivity values were at the variation (90/10) those were 1.1566 Q−1 m1 and 1.1077 Q-1 m1 in light and dark conditions, respectively. The DSSC efficiencies obtained 0.037%, 0.078%, and 0.083% for the variation of 100:0%, 95:5%, and 90:10%, respectively.