Methylene Blue-EDTA-Sodium Lauryl Sulphate System for the Generation of Electricity in a Photogalvanic Cell

Methylene blue has been used as a photosensitized in photogalvanic cell for solar energy conversion. EDTA was used as an electronic donor (reductant) and sodium lauryl sulphate (surfactant) was used as an anionic micelle for greater photoejection of electrons. The photopotential and photocurrent without surfactant was found to be 692 mV and 71 mV respectively whereas with surfactant their values were found to be 744 mV and 104 μA respectively. The effect of various parameters on the electrical output of the cell has been studied. The current voltage (i-V) characteristics of the cell has also been observed. Performance of the cell was determined in dark at its power point.