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Closing the Gap for Electronic Short‐Circuiting: Photosystem I Mixed Monolayers Enable Improved Anisotropic Electron Flow in Biophotovoltaic Devices
Author(s) -
Wang Panpan,
Frank Anna,
Zhao Fangyuan,
Szczesny Julian,
Junqueira João R. C.,
Zacarias Sónia,
Ruff Adrian,
Nowaczyk Marc M.,
Pereira Inês A. C.,
Rögner Matthias,
Conzuelo Felipe,
Schuhmann Wolfgang
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202008958
Subject(s) - photocathode , photosystem i , photocurrent , monolayer , electron transfer , optoelectronics , materials science , electron transport chain , electrode , monomer , ferredoxin , electron , photochemistry , chemistry , photosystem ii , polymer , nanotechnology , photosynthesis , physics , biochemistry , quantum mechanics , composite material , enzyme
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 H 2 evolution.