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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/18955

Title: Photocurrent Generation in Diamond Electrodes Modified with Reaction Centers
Authors: Caterino, Roberta
Csiki, Reka
Lyuleeva, Alina
Pfisterer, Jonas
Wiesinger, Markus
JANSSENS, Stoffel
HAENEN, Ken
Cattani-Scholz, Anna
Stutzmann, Martin
Garrido, Jose A.
Issue Date: 2015
Publisher: AMER CHEMICAL SOC
Citation: ACS APPLIED MATERIALS & INTERFACES, 7 (15), p. 8099-8107
Abstract: Photoactive reaction centers (RCs) are protein complexes in bacteria able to convert sunlight into other forms of energy with a high quantum yield. The photostimulation of immobilized RCs on inorganic electrodes result in the generation of photocurrent that is of interest for biosolar cell applications. This paper reports on the use of novel electrodes based on functional conductive nanocrystalline diamond onto which bacterial RCs are immobilized. A three-dimensional conductive polymer scaffold grafted to the diamond electrodes enables efficient entrapment of photoreactive proteins. The electron transfer in these functional diamond electrodes is optimized through the use of a ferrocene-based electron mediator, which provides significant advantages such as a rapid electron transfer as well as high generated photocurrent. A detailed discussion of the generated photocurrent as a function of time, bias voltage, and mediators in solution unveils the mechanisms limiting the electron transfer in these functional electrodes. This work featuring diamond-based electrodes in biophotovoltaics offers general guidelines that can serve to improve the performance of similar devices based on different materials and geometries.
Notes: [Caterino, Roberta; Csiki, Reka; Lyuleeva, Alina; Pfisterer, Jonas; Wiesinger, Markus; Cattani-Scholz, Anna; Stutzmann, Martin; Garrido, Jose A.] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany. [Caterino, Roberta; Csiki, Reka; Lyuleeva, Alina; Pfisterer, Jonas; Wiesinger, Markus; Cattani-Scholz, Anna; Stutzmann, Martin; Garrido, Jose A.] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany. [Janssens, Stoffel D.; Haenen, Ken] Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. [Janssens, Stoffel D.; Haenen, Ken] IMEC VZW, IMOMEC, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/18955
DOI: 10.1021/acsami.5b00711
ISI #: 000353607100034
ISSN: 1944-8244
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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