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Supramolecular n/p-heterojunction photosystems with antiparallel redox gradients in electron- and hole-transporting pathways

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Published in Journal of the American Chemical Society. 2010, vol. 132, no. 20, p. 6923 - 6925
Abstract Lessons from nature call for supramolecular n/p-heterojunctions with oriented multicolored antiparallel redox gradients (OMARG-SHJs) as “ideal” photosystems. Their design combines advantages of bilayer and bulk n/p-heterojunction (BHJ) solar cells for the directional separation of photogenerated charges before recombination can occur. Although conceptually attractive, OMARG-SHJs have remained beyond reach because of unresolved challenges in synthetic organic and supramolecular chemistry. Here we report the first OMARG-SHJs with two-component redox gradients in both the electron- and hole-transporting pathways. They were obtained by zipper assembly of stacks of red naphthalenediimide (NDI) electron donors along strings of oligophenylethynyl hole acceptors on top of yellow NDI electron acceptors along p-oligophenyl hole donors. The presence of both gradients is shown to be essential for achieving photoinduced charge separation over very long distances.
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SAKAI, Naomi et al. Supramolecular n/p-heterojunction photosystems with antiparallel redox gradients in electron- and hole-transporting pathways. In: Journal of the American Chemical Society, 2010, vol. 132, n° 20, p. 6923 - 6925. https://archive-ouverte.unige.ch/unige:6649

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Deposited on : 2010-05-20

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