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- W2113249009 abstract "Abstract Different configurations of CdS nanoparticles (NPs) are linked to Au electrodes by electropolymerization of thioaniline‐functionalized CdS NPs onto thioaniline‐functionalized Au‐electrodes. In one configuration, thioaniline‐functionalized CdS NPs are electropolymerized in the presence of thioanline‐modified Au NPs to yield an oligoaniline‐crosslinked CdS/Au NPs array. The NP‐functionalized electrode generates a photocurrent with a quantum yield that corresponds to ca. 9%. The photocurrent intensities are controlled by the potential applied on the electrode, and the redox‐state of the oligoaniline bridge. In the oxidized quinoide state of the oligoaniline units, the bridges act as electron acceptors that trap the conduction‐band electrons that are transported to the electrode and lead to high quantum yield photocurrents. The reduced π ‐donor oligoaniline bridges act as π ‐donor sites that associate N , N ′‐dimethyl‐4,4′‐bipyridinium, MV 2+ , by donor/acceptor interactions, K a = 5270 M −1 . The associated MV 2+ acts as an effective trap of the conduction‐band electrons, and in the presence of triethanolamine (TEOA) as an electron donor, high photocurrent values are measured (ca. 12% quantum yield). The electropolymerization of thioaniline‐functionalized Au NPs and thioaniline‐modified CdS NPs in the presence of MV 2+ yields a MV 2+ ‐imprinted NP array. The imprinted array exhibits enhanced affinities toward the association of MV 2+ to the oligoaniline π ‐donor sites, K a = 2.29 × 10 4 M −1 . This results in the effective trapping of the conduction‐band electrons and an enhanced quantum yield of the photocurrent, ca. 34%. The sacrificial electron donor, TEOA, was substituted with the reversible donor I 3 − . A solar cell consisting of the imprinted CdS/Au NPs array, with MV 2+ and I 3 − , was constructed. The cell generated a photocurrent with a quantum yield of 4.7%." @default.
- W2113249009 created "2016-06-24" @default.
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- W2113249009 date "2008-11-03" @default.
- W2113249009 modified "2023-09-29" @default.
- W2113249009 title "Solar Cells with Enhanced Photocurrent Efficiencies Using Oligoaniline-Crosslinked Au/CdS Nanoparticles Arrays on Electrodes" @default.
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- W2113249009 doi "https://doi.org/10.1002/adfm.200800810" @default.
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