Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

9.8K
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...
9.8K
P-N junction01:11

P-N junction

454
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...
454
The Antenna Complex01:42

The Antenna Complex

5.9K
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency...
5.9K
Photosystem II01:22

Photosystem II

69.7K
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...
69.7K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
1.8K
Light as Energy01:35

Light as Energy

78.0K
The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...
78.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Engineering of Volatile Cations in Tetrafluoroborate-Based Spontaneous Heterointerface Modulators for Perovskite Solar Cells.

ACS applied materials & interfaces·2025
Same author

Laser ablation process of CsPbBr<sub>3</sub> heterostructures for light-emitting diode applications.

Science and technology of advanced materials·2025
Same author

Photoluminescence decay of mobile carriers influenced by imperfect quenching at particle surfaces with subdiffusive spread.

The Journal of chemical physics·2024
Same author

Spontaneous Heterointerface Modulation by a Methylammonium Tetrafluoroborate Additive for a Narrow-Bandgap FAPbI<sub>3</sub> Photoabsorber in Perovskite Solar Cells.

ACS applied materials & interfaces·2024
Same author

Photoluminescence study of anatase TiO2 photocatalysts at the pico- and nanosecond timescales.

The Journal of chemical physics·2024
Same author

Optimizing the Distance between Upconversion Thin Films and Silver Nanoprisms for the Design of a High-Performance Plasmonic Triplet-Triplet Annihilation Upconversion System.

Langmuir : the ACS journal of surfaces and colloids·2023

Related Experiment Video

Updated: May 29, 2025

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
13:29

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

14.1K

Photoionization-induced charge separation for efficient solar energy conversion.

Ryuzi Katoh1

  • 1College of Engineering, Nihon University, Koriyama, Fukushima 963-8642, Japan.

The Journal of Chemical Physics
|February 3, 2025
PubMed
Summary

Photoionization-induced charge separation is key for solar energy conversion. This process involves electron transfer, with threshold energy and efficiency crucial for optimizing solar cell performance.

More Related Videos

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

12.5K
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

6.2K

Related Experiment Videos

Last Updated: May 29, 2025

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
13:29

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

Published on: August 23, 2012

14.1K
Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

12.5K
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

6.2K

Area of Science:

  • Physical Chemistry
  • Materials Science
  • Renewable Energy

Background:

  • Photo-induced charge separation is the primary process in solar energy conversion.
  • Understanding electron transfer from discrete to continuous states is essential.

Purpose of the Study:

  • To summarize the current understanding of photoionization-induced charge separation.
  • To emphasize the role of threshold energy and efficiency in photoionization.
  • To discuss charge separation mechanisms in dye-sensitized solar cells as a photoionization system.

Main Methods:

  • Review of existing literature on photoionization and charge separation.
  • Analysis of charge separation mechanisms in alkane solutions and aromatic organic crystals.
  • Application of these principles to dye-sensitized solar cells.

Main Results:

  • Photoionization involves electron transfer from discrete to continuous electronic states.
  • Threshold energy and efficiency are critical parameters for photoionization.
  • Dye-sensitized solar cells can be viewed as photoionization-induced solar energy conversion systems.

Conclusions:

  • The photoionization-induced charge separation mechanism provides a framework for understanding solar energy conversion.
  • Further research into threshold energy and efficiency can optimize solar cell performance.
  • This perspective highlights the applicability of photoionization principles to advanced solar cell technologies.