Energy conversion and storage potential of photogalvanic cell based on mixed dyes system: Ethylene diaminetetraacetic acid—Toluidine blue—Thionine



The photogalvanic effect was studied in a photogalvanic cell containing ethylene diaminetetraacetic acid as reductant, toluidine blue, and thionine as photosensitizers. The photopotential and photocurrent generated were 695.0 mV and 105.0 μA, respectively. The observed conversion efficiency was 0.16%, and the maximum output (power) of the cell was 72.9μW. The photogalvanic cell can be used at this power level for 42.0 min in the dark due to the storage capacity of the cell. The effects of various parameters on electrical output of the cell were observed. The mechanism of the generation of the photocurrent in photogalvanic cells has also been proposed. © 2010 American Institute of Chemical Engineers Environ Prog, 2010