Immobilization of photosystem I or II complexes on electrodes for preparation of photoenergy-conversion devices

Abstract

Photosystems, PSI and PSII isolated from Thermosynechococcus elongatus were successfully immobilized on a TiO 2 nanostructured film for use in dyesensitized biosolar cells (DSBCs). The photosystem complexes were also immobilized on an ITO electrode modified with 3-aminopropyltriethoxysilane by utilizing the interactions between the electrode and the surface of the PSI or PSII polypeptide. Illumination of the PSI and PSII complexes immobilized on the ITO electrode resulted in action spectra in the presence of methyl viologen, which corresponded to the absorption spectra of the complexes. Compared with the ITO electrode, PSI or PSII complexes assembled on the TiO 2 electrode had much higher energy-conversion efficiency in the presence of an iodide/triiodide redox system of an ionic-liquid-based electrolyte. This could have interesting applications in the development of DSBCs.

Green Catalysts: Applied and Synthetic Photosynthesis

“…In addition to increased photosensitizer loading, increased contact with redox electrolytes is also achieved with 3D nanostructured semiconductor materials [25]. Some 3D structures utilized to date include TiO2 nanoparticles (NPs), nanotubes, nanopyramids, and inverse opal designs [26,27] [18,28].…”

Photocurrent generation by a photosystem I-NiO photocathode for a p-type biophotovoltaic tandem cell

“…1,14 Especially, biophotovoltaics based on dye-sensitized solar cells (DSSCs) 15 have been investigated using the metal-oxide semiconductors, TiO 2 , Fe 2 O 3 and ZnO as the electrode. 14,[16][17][18][19][20][21][22] DSSCs generally consist of a dye-sensitized photoanode, Pt counter electrode, and electrolyte. In 2012, Mershin et al reported PSI-based DSSCs on nanostructured TiO 2 and ZnO electrodes using a Co(II/III) redox mediator.…”

“…In 2012, Mershin et al reported PSI-based DSSCs on nanostructured TiO 2 and ZnO electrodes using a Co(II/III) redox mediator. 16 Similarly, Kondo et al demonstrated PSI-and PSII-based DSSCs using a TiO 2 electrode, 17 and in 2015, Yu et al achieved the most effective PSI-and LHCIIbased DSSC to date using two different particle sizes of TiO 2 . 18 Furthermore, polyaniline/TiO 2 (ref.…”

Enhancement of Photocurrent by Integration of an Artificial Light-Harvesting Antenna with a Photosystem I Photovoltaic Device

“…The efficient unidirectional electron transfer of PSI is implemented in biophotovoltaic cells by the deposition of PSI onto the electrodes. − These devices have been fabricated in the same way as dye-sensitized solar cells (DSSCs), which consist of a TiO 2 semiconductor electrode, counter electrode, and redox mediator . For example, Mershin et al reported PSI biophotovoltaics on nanostructured TiO 2 and ZnO electrodes using a Co­(II/III) redox mediator .…”

“…The electrolyte was an iodide/tri-iodide redox-based ionic liquid, reported previously (see the SI). , The incident photon-to-current conversion efficiency (IPCE) spectra were measured (Figure ) to evaluate the photovoltaic performance under monochromatic light. Moreover, the photocurrent-density–voltage ( J – V ) curve and characteristics under AM 1.5 G (100 mW cm –2 reference solar irradiation) are summarized in Figure S4 and Table , respectively.…”