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Graphene oxide decorated with gold enables efficient biophotovolatic cells incorporating photosystem I

Nahid TorabiDepartment of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, IranSylvia RoussevaStratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The NetherlandsQi ChenZernike Institute for Advanced Materials, Nijenborgh 4, 9747 AG Groningen, The NetherlandsAli AshrafiDepartment of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, IranA. KermanpurDepartment of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, IranRyan C. ChiechiDepartment of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, USA

2022en

ABI

Annotatsiya

demonstrating good coupling between photosystem I and the electrodes. The best-performing device reached an external power conversion efficiency of 0.64%, the highest for any solid-state photosystem I-based photovoltaic device that has been reported to date. Our results demonstrate that the functionality of photosystem I in the non-natural environment of solid-state biophotovoltaic cells can be improved through the modification of electrodes with efficient charge-transfer layers. The combination of reduced graphene oxide with gold nanoparticles caused tailoring of the electronic structure and alignment of the energy levels while also increasing electrical conductivity. The decoration of graphene electrodes with gold nanoparticles is a generalizable approach for enhancing charge-transfer across interfaces, particularly when adjusting the levels of the active layer is not feasible, as is the case for photosystem I and other biological molecules.

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DOI: 10.1039/d1ra08908k

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