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Related Concept Videos

Photosystem I01:27

Photosystem I

52.7K
Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
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Photosystems01:32

Photosystems

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Photosystems are multiprotein complexes that form the functional units of photosynthesis in plants, algae, and cyanobacteria. They are found embedded in the membrane of tiny sac-like structures called thylakoids placed inside the chloroplast.
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment...
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Photosystem II01:22

Photosystem II

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The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across  two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
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Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

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Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
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P-N junction01:11

P-N junction

1.6K
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

12.6K
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
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Updated: Apr 29, 2026

Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers
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Solid-state biophotovoltaic cells containing photosystem I.

Pavlo I Gordiichuk1, Gert-Jan A H Wetzelaer, Dolev Rimmerman

  • 1Polymer Chemistry and Bioengineering Group, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.

Advanced Materials (Deerfield Beach, Fla.)
|May 28, 2014
PubMed
Summary

Photosystem I (PSI), a large protein complex, was used in a solid-state organic photovoltaic cell. This demonstrates that large protein complexes can be processed with organic semiconductors in dry, non-biological environments.

Keywords:
biomimeticsbiophotovoltaic celllight harvestingphotosystem Isolar cell

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Area of Science:

  • Biophysics
  • Materials Science
  • Renewable Energy

Background:

  • Photosynthesis relies on large protein complexes like photosystem I (PSI).
  • Organic photovoltaic cells offer potential for renewable energy generation.

Purpose of the Study:

  • To investigate the integration of photosystem I (PSI) into a solid-state organic photovoltaic cell.
  • To assess the compatibility of photoactive megadalton protein complexes with organic semiconductor processing.

Main Methods:

  • Integration of PSI into a solid-state organic photovoltaic device.
  • Solution processing techniques for organic semiconductor materials.

Main Results:

  • Successfully incorporated PSI as the active component in an organic photovoltaic cell.
  • Demonstrated compatibility of PSI with solution processing of organic semiconductors.
  • Showcased PSI functionality in a dry, non-natural environment.

Conclusions:

  • Large protein complexes, such as PSI, can be utilized in artificial photovoltaic devices.
  • PSI maintains photoactivity when processed with organic semiconductors in a non-biological setting.
  • This opens possibilities for bio-hybrid solar cells.