Comparative Study of Photosensitizing Dyes in Photogalvanic Cells for Solar Energy Conversion and Storage: Brij-35−Diethylenetriamine Pentaacetic Acid (DTPA) System

The photogalvanic effect has been studied in three systems using photogalvanic cells: Brij-35−diethylenetriamine pentaacetic acid (DTPA)−Safranine, Brij-35−DTPA−Bismark Brown, and Brij-35−DTPA−Methyl Orange systems. The photopotential and photocurrent generated by these systems were 842, 786, and 625 mV and 155, 115, and 95 μA, respectively. The effects of different parameters on the electrical outputs of the cell have been observed, and current−voltage characteristics of the cell have been studied. A mechanism has been proposed for the generation of photocurrent in photogalvanic cells. The conversion efficiencies for Safranine, Bismark Brown, and Methyl Orange were 0.6438, 0.5192, and 0.2707%, and storage capacities were 122, 117, and 94 min, respectively.