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On the performance of a photosystem II reaction centre-based photocell

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Abstract

The photosystem II reaction centre is the photosynthetic complex responsible for oxygen production on Earth. Its water splitting function is particularly favoured by the formation of a stable charge separated state via a pathway that starts at an accessory chlorophyll. Here we envision a photovoltaic device that places one of these complexes between electrodes and investigate how the mean current and its fluctuations depend on the microscopic interactions underlying charge separation in the pathway considered. Our results indicate that coupling to well resolved vibrational modes does not necessarily offer an advantage in terms of power output but can lead to photo-currents with suppressed noise levels characterizing a multi-step ordered transport process. Besides giving insight into the suitability of these complexes for molecular-scale photovoltaics, our work suggests a new possible biological function for the vibrational environment of photosynthetic reaction centres, namely, to reduce the intrinsic current noise for regulatory processes.

Graphical abstract: On the performance of a photosystem II reaction centre-based photocell

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Publication details

The article was received on 07 Jul 2017, accepted on 04 Aug 2017 and first published on 04 Aug 2017


Article type: Edge Article
DOI: 10.1039/C7SC02983G
Citation: Chem. Sci., 2017, Advance Article
  • Open access: Creative Commons BY license
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    On the performance of a photosystem II reaction centre-based photocell

    R. Stones, H. Hossein-Nejad, R. van Grondelle and A. Olaya-Castro, Chem. Sci., 2017, Advance Article , DOI: 10.1039/C7SC02983G

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