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Plasmonic enhancement of photocurrent generation in a photosystem I-based hybrid electrode

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Abstract

We experimentally demonstrate that oriented assembly of red algal photosystem I (PSI) reaction centers on a plasmonically active Silver Island Film (SIF) leads to strong enhancement of both the fluorescence intensity and photocurrent generated upon illumination. PSI complexes were specifically attached to a monolayer of graphene deposited on the SIF layer. The results of comprehensive fluorescence microscopy point to the critical role of the SIF layer in enhancing the optical response of PSI, as we observe increased emission intensity. Hence, importantly, the strong increase of photocurrent generation demonstrated for the biohybrid electrodes can be directly associated with the plasmonic enhancement of the optical and electrochemical functionalities of PSI. The results also indicate that the graphene layer is not diminishing the influence of the plasmonic excitations in SIF on the absorption and emission of PSI.

Graphical abstract: Plasmonic enhancement of photocurrent generation in a photosystem I-based hybrid electrode

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Article information


Submitted
22 Dec 2019
Accepted
13 Mar 2020
First published
14 Mar 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Plasmonic enhancement of photocurrent generation in a photosystem I-based hybrid electrode

M. Szalkowski, E. Harputlu, M. Kiliszek, C. G. Unlu, S. Maćkowski, K. Ocakoglu, J. Kargul and D. Kowalska, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC06983F

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