Inversion of the Photogalvanic Effect of Conductive Polymers by Porphyrin Dopants

Conductive polymers are widely used as active and auxiliary materials for organic photovoltaic cells due to their easily tunable properties, high electronic conductivity, light absorption. Several conductive show the cathodic photogalvanic effect in pristine state. Recently, photoelectrochemical oxygen reduction has been demonstrated nickel complexes of Salen-type ligands. Herein, we report an unexpected inversion caused by doping NiSalen with anionic porphyrins. The observed was studied means UV-Vis spectroscopy, cyclic voltammetry chopped chronoamperometry. While NiSalens exhibit photopolarization, porphyrins inverts polarization. As a result, oxidation ascorbate proceeds smoothly on electrode doped zinc highest photocurrents were polymer o-phenylene imine bridge, porphyrin. Assuming this, porphyrin serves both catalytic center internal electron donor, facilitating photoinduced charge transport anodic depolarization.