Improved quantum efficiency in an engineered light harvesting/photosystem II super-complex for high current density biophotoanodes
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Improved quantum efficiency in an engineered light harvesting/photosystem II super-complex for high current density biophotoanodes. / Hartmann, Volker; Harris, Dvir; Bobrowski, Tim; Ruff, Adrian; Frank, Anna; Günther Pomorski, Thomas; Rögner, Matthias; Schuhmann, Wolfgang; Adir, Noam; Nowaczyk, Marc M.
In: Journal of Materials Chemistry A, Vol. 8, No. 29, 2020, p. 14463-14471.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Improved quantum efficiency in an engineered light harvesting/photosystem II super-complex for high current density biophotoanodes
AU - Hartmann, Volker
AU - Harris, Dvir
AU - Bobrowski, Tim
AU - Ruff, Adrian
AU - Frank, Anna
AU - Günther Pomorski, Thomas
AU - Rögner, Matthias
AU - Schuhmann, Wolfgang
AU - Adir, Noam
AU - Nowaczyk, Marc M.
N1 - Publisher Copyright: © 2020 The Royal Society of Chemistry.
PY - 2020
Y1 - 2020
N2 - Photosystem II (PSII) is the only enzyme that catalyzes light-induced water oxidation, the basis for its application as a biophotoanode in various bio-photovoltaics and photo-bioelectrochemical cells. However, the absorption spectrum of PSII limits the quantum efficiency in the range of visible light, due to a gap in the green absorption region of chlorophylls (500-600 nm). To overcome this limitation, we have stabilized the interaction between PSII and Phycobilisomes (PBSs)-the cyanobacterial light harvesting complex, in vitro. The PBS of three different cyanobacteria (Acaryochloris marina, Am, Mastigocladus laminosus, ML, and Synechocystis sp. PCC 6803, Syn) are analyzed for their ability to transfer energy to Thermosynechococcus elongatus (Te) PSII by fluorescence spill-over and photo-current action spectra. Integration of the PBS-PSII super-complexes within an Os-complex-modified hydrogel on macro-porous indium tin oxide electrodes (MP-ITO) resulted in notably improved, wavelength dependent, incident photon-to-electron conversion efficiencies (IPCE). IPCE values in the green gap were doubled from 3% to 6% compared to PSII electrodes without PBS and a maximum IPCE up to 10.9% at 670 nm was achieved.
AB - Photosystem II (PSII) is the only enzyme that catalyzes light-induced water oxidation, the basis for its application as a biophotoanode in various bio-photovoltaics and photo-bioelectrochemical cells. However, the absorption spectrum of PSII limits the quantum efficiency in the range of visible light, due to a gap in the green absorption region of chlorophylls (500-600 nm). To overcome this limitation, we have stabilized the interaction between PSII and Phycobilisomes (PBSs)-the cyanobacterial light harvesting complex, in vitro. The PBS of three different cyanobacteria (Acaryochloris marina, Am, Mastigocladus laminosus, ML, and Synechocystis sp. PCC 6803, Syn) are analyzed for their ability to transfer energy to Thermosynechococcus elongatus (Te) PSII by fluorescence spill-over and photo-current action spectra. Integration of the PBS-PSII super-complexes within an Os-complex-modified hydrogel on macro-porous indium tin oxide electrodes (MP-ITO) resulted in notably improved, wavelength dependent, incident photon-to-electron conversion efficiencies (IPCE). IPCE values in the green gap were doubled from 3% to 6% compared to PSII electrodes without PBS and a maximum IPCE up to 10.9% at 670 nm was achieved.
U2 - 10.1039/d0ta03444d
DO - 10.1039/d0ta03444d
M3 - Journal article
AN - SCOPUS:85092242330
VL - 8
SP - 14463
EP - 14471
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 29
ER -
ID: 272644086