Closing the Gap for Electronic Short-Circuiting: Photosystem I Mixed Monolayers Enable Improved Anisotropic Electron Flow in Biophotovoltaic Devices

Panpan Wang, Anna Frank, Fangyuan Zhao, Julian Szczesny, João R.C. Junqueira, Sónia Zacarias, Adrian Ruff, Marc M. Nowaczyk, Inês A.C. Pereira, Matthias Rögner, Felipe Conzuelo, Wolfgang Schuhmann

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Well-defined assemblies of photosynthetic protein complexes are required for an optimal performance of semi-artificial energy conversion devices, capable of providing unidirectional electron flow when light-harvesting proteins are interfaced with electrode surfaces. We present mixed photosystem I (PSI) monolayers constituted of native cyanobacterial PSI trimers in combination with isolated PSI monomers from the same organism. The resulting compact arrangement ensures a high density of photoactive protein complexes per unit area, providing the basis to effectively minimize short-circuiting processes that typically limit the performance of PSI-based bioelectrodes. The PSI film is further interfaced with redox polymers for optimal electron transfer, enabling highly efficient light-induced photocurrent generation. Coupling of the photocathode with a [NiFeSe]-hydrogenase confirms the possibility to realize light-induced H2 evolution.

Original languageEnglish
Pages (from-to)2000-2006
Number of pages7
JournalAngewandte Chemie - International Edition
Volume60
Issue number4
DOIs
Publication statusPublished - 25 Jan 2021

Keywords

  • Biophotovoltaics
  • Electrochemistry
  • Langmuir–Blodgett films
  • Photosystem I
  • Redox polymers

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