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Article

Inversion of the Photogalvanic Effect of Conductive Polymers by Porphyrin Dopants

Institute of Chemistry, Saint Petersburg State University, University Embankment, 7/9, 199034 St. Petersburg, Russia
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Author to whom correspondence should be addressed.
Academic Editor: Vincenzo Baglio
Catalysts 2021, 11(6), 729; https://doi.org/10.3390/catal11060729
Received: 15 May 2021 / Revised: 11 June 2021 / Accepted: 12 June 2021 / Published: 12 June 2021
(This article belongs to the Special Issue Catalysts in Energy Applications)
Conductive polymers are widely used as active and auxiliary materials for organic photovoltaic cells due to their easily tunable properties, high electronic conductivity, and light absorption. Several conductive polymers show the cathodic photogalvanic effect in pristine state. Recently, photoelectrochemical oxygen reduction has been demonstrated for nickel complexes of Salen-type ligands. Herein, we report an unexpected inversion of the photogalvanic effect caused by doping of the NiSalen polymers with anionic porphyrins. The observed effect was studied by means of UV-Vis spectroscopy, cyclic voltammetry and chopped light chronoamperometry. While pristine NiSalens exhibit cathodic photopolarization, doping with porphyrins inverts the polarization. As a result, photoelectrochemical oxidation of the ascorbate proceeds smoothly on the NiSalen electrode doped with zinc porphyrins. The highest photocurrents were observed on NiSalen polymer with o-phenylene imine bridge, doped with anionic zinc porphyrin. Assuming this, porphyrin serves both as a catalytic center for the oxidation of ascorbate and an internal electron donor, facilitating the photoinduced charge transport and anodic depolarization. View Full-Text
Keywords: photocurrent; NiSalen; porphyrin; electrodeposition; photovoltaics photocurrent; NiSalen; porphyrin; electrodeposition; photovoltaics
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MDPI and ACS Style

Petrov, A.A.; Lukyanov, D.A.; Kopytko, O.A.; Novoselova, J.V.; Alekseeva, E.V.; Levin, O.V. Inversion of the Photogalvanic Effect of Conductive Polymers by Porphyrin Dopants. Catalysts 2021, 11, 729. https://doi.org/10.3390/catal11060729

AMA Style

Petrov AA, Lukyanov DA, Kopytko OA, Novoselova JV, Alekseeva EV, Levin OV. Inversion of the Photogalvanic Effect of Conductive Polymers by Porphyrin Dopants. Catalysts. 2021; 11(6):729. https://doi.org/10.3390/catal11060729

Chicago/Turabian Style

Petrov, Alexey A., Daniil A. Lukyanov, Oleg A. Kopytko, Julia V. Novoselova, Elena V. Alekseeva, and Oleg V. Levin 2021. "Inversion of the Photogalvanic Effect of Conductive Polymers by Porphyrin Dopants" Catalysts 11, no. 6: 729. https://doi.org/10.3390/catal11060729

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