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• W3007884729 endingPage "110447" @default.
• W3007884729 startingPage "110447" @default.
• W3007884729 abstract "A series of electrostatically self-assembled films consisting of a Keggin-type cobalt-substituted tungstoborate anion [BW11Co(H2O)O39]7- (BW11Co) and three hemicyanine cations with two chromophores linked by varying lengths of alkyl chains, (E)-1,1'-(propane-1,3-diyl)bis(4-(4-(dimethylamino)styryl)pyridinium) cation (H3), (E)-1,1'-(hexane-1,6-diyl)bis(4-(4-(dimethylamino)styryl)pyridinium) cation (H6), and (E)-1,1'-(decane-1,10-diyl)bis(4-(4-(dimethylamino)styryl)pyridinium) cation (H10), were successfully prepared by layer-by-layer self-assembly technique. UV–visible spectra showed that BW11Co and Ha (a = 3, 6, 10) components were uniformly deposited in each dipping cycle. The visible absorption peaks of (BW11Co/Ha)n films are obviously red shifted as compared with those of corresponding Ha solution, which is beneficial for improving photoelectric conversion. As irradiated with white light, the (BW11Co/Ha)n films generated stable, large cathodic photocurrents that increasing with increasing negative applied bias potentials, increasing of electron acceptor concentrations and decreasing electron donor concentrations in the electrolyte solution. The photocurrents were also found to be strongly depending on layer number of the films, and alkyl chain length in the hemicyanine dyes of Ha (a = 3, 6, 10). The maximum photocurrent densities generated by (BW11Co/H3)4, (BW11Co/H6)5, and (BW11Co/H10)4 films were found to be 18.05, 16.6 and 15.8 μA/cm2, respectively. The photocurrent generation performance of (BW11Co/Ha)n films is superior to that of POM-free hemicyanine dye films. POM components can significantly improve the photocurrent generation properties of hemicyanine dyes by efficient electron transference between the ITO electrode and the hemicyanine, and retardation of recombination reaction in photoelectrochemical cells. This study would guide molecular design for more efficient photoelectrocatalytic, and energy conversion and storage devices." @default.
• W3007884729 created "2020-03-06" @default.
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• W3007884729 date "2020-06-01" @default.
• W3007884729 modified "2023-09-26" @default.
• W3007884729 title "Improved photocurrent generation of three hybrid films made of [BW11Co(H2O)O39]7- and hemicyanines with alkyl linkers of varying length" @default.
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• W3007884729 doi "https://doi.org/10.1016/j.solmat.2020.110447" @default.
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