Photoactive films of photosystem I on transparent reduced graphene oxide electrodes.

Darby E, LeBlanc G, Gizzie EA, Winter KM, Jennings GK, Cliffel DE
Langmuir. 2014 30 (29): 8990-4

PMID: 25029217 · DOI:10.1021/la5010616

Photosystem I (PSI) is a photoactive electron-transport protein found in plants that participates in the process of photosynthesis. Because of PSI's abundance in nature and its efficiency with charge transfer and separation, there is a great interest in applying the protein in photoactive electrodes. Here, we developed a completely organic, transparent, conductive electrode using reduced graphene oxide (RGO) on which a multilayer of PSI could be deposited. The resulting photoactive electrode demonstrated current densities comparable to that of a gold electrode modified with a multilayer film of PSI and significantly higher than that of a graphene electrode modified with a monolayer film of PSI. The relatively large photocurrents produced by integrating PSI with RGO and using an opaque, organic mediator can be applied to the facile production of more economic solar energy conversion devices.

MeSH Terms (11)

2,6-Dichloroindophenol Electrodes Electron Transport Ferricyanides Ferrocyanides Graphite Oxidation-Reduction Oxides Photosystem I Protein Complex Ruthenium Compounds Solar Energy

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