Closing the Gap for Electronic Short‐Circuiting: Photosystem I Mixed Monolayers Enable Improved Anisotropic Electron Flow in Biophotovoltaic Devices
| Autor: | Adrian Ruff, Sonia Zacarias, João R. C. Junqueira, Wolfgang Schuhmann, Panpan Wang, Marc M. Nowaczyk, Felipe Conzuelo, Inês A. C. Pereira, Julian Szczesny, Fangyuan Zhao, Matthias Rögner, Anna Frank |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Biophotovoltaics Light 010402 general chemistry Photosystem I Cyanobacteria 01 natural sciences Catalysis Photocathode Electron Transport Electron transfer Monolayer Electrochemistry Research Articles Photocurrent Quantitative Biology::Biomolecules Redox polymers Biophotovoltaic Photosystem I Protein Complex 010405 organic chemistry business.industry General Chemistry Electrochemical Techniques 0104 chemical sciences Electrode Optoelectronics Anisotropy Langmuir–Blodgett films business Short circuit Research Article |
| Zdroj: | Angewandte Chemie (International Ed. in English) |
| ISSN: | 1521-3773 1433-7851 |
| Popis: | 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. Towards the development of improved biophotovoltaic devices for solar energy conversion, a mixed monolayer constituted by photosystem I trimers and monomers enables the fabrication of highly efficient biophotoelectrodes by minimizing electronic short‐circuiting processes while at the same time ensuring a high density of photoactive molecules per unit area. |
| Databáze: | OpenAIRE |
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