Photocurrent generation from visible light irradiation of covalent polyoxometalate–porphyrin copolymers
نویسندگان
چکیده
Four hybrid polyoxometalate–porphyrin copolymer films were obtained by the electrooxidation of zinc-β-octaethylporphyrin (ZnOEP) or 5,15-ditolylporphyrin (H2T2P) in presence organosilyl functionalized Keggin-type POMs TBA3[PW11Si2O40C26H16N2] (abbreviated Py-PW11Si2-Py) and Dawson-type TBA6[P2W17Si2O62C26H16N2] Py-P2W17Si2-Py) bearing two remote pyridyl groups. The electropolymerization process four copolymers was monitored EQCM. characterized UV/Vis spectroscopy, X-ray photoelectron electrochemistry, AFM. Their impedance properties (EIS) studied their photovoltaic performances also investigated photocurrent transient measurements under visible light irradiation. These studies showed a correlation between performances, based on Dawson type Zn porphyrins giving best results. This last system displayed one efficiency for reported POM photosensitized hybrid.
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ژورنال
عنوان ژورنال: Electrochimica Acta
سال: 2021
ISSN: ['1873-3859', '0013-4686']
DOI: https://doi.org/10.1016/j.electacta.2020.137635