The performance parameters of the DSSCs are shown in Table 1 and Fig. 3. The average voltage produced from the N719 dye-based DSSC was higher than those from the PL dye-based DSSCs. Increasing the acidity of the natural dyes produced a higher voltage, achieving the highest value of 490 mV for the pH 5.0 natural dye-based DSSC. The value of Voc depends on the energy levels of the highest occupied molecular orbital (EHOMO) and lowest unoccupied molecular orbital (ELUMO); these were tested using CV and the results are shown in Table 2. The HOMO acting as the ground state is the highest energy molecular orbital (MO) containing at least one electron. Correspondingly, the LUMO is the lowest energy orbital where electrons excite.