A spiropyran-based photoelectrochemical cell with light-induced charging

For the first time, a spiropyran-based photoelectrochemical cell capable of autonomous and repetitive recharging under visible light has been successfully developed. The operational principle and recharging mechanism of these photoelectrochemical elements are based in the cyclic repetition of processes involving the photo-decomposition of zinc spiropyran complexes, followed by spontaneous complex formation within non-aqueous polar solvents. Initially, this process releases free zinc ions, which subsequently engage in spontaneous complex formation in the absence of external illumination. The operability of photoelectrochemical cells of this type has been demonstrated, accompanied by the measurement of essential parameters such as cell potential (electromotive force) and the current intensity produced by the cell. We propose that the exceptionally low cost and straightforward fabrication process of such cells could facilitate their practical use in green energy production.