Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

P-N junction

P-N junction

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...

Photosystem I

Photosystem I

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...

You might also read

Related Articles

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

Sort by

Same author

From Fundamental Photophysics to Photocatalysis: Energy Gap Law Analysis of Anion Radical Excited States.

ACS central science·2026

Same author

Association learning drives synaptic plasticity at feedforward synapses in somatosensory cortex.

Cerebral cortex (New York, N.Y. : 1991)·2026

Same author

Residual Stress-Based Soft Robot with Capability for Grasping and Buoyancy Control.

Biomimetics (Basel, Switzerland)·2026

Same author

Influence of blend composition on morphology and exciton-charge dynamics in MEH-PPV: PMMA thin films.

Physical chemistry chemical physics : PCCP·2026

Same author

Design of morphing patterns in knitted SMA textile actuators via knitting codes.

Scientific reports·2026

Same author

BF<sub>2</sub>- and PO<sub>2</sub>-Chealted Oxasmaragdyrins - Excited state properties, singlet oxygen generation, and imaging potential in mice bearing colon tumor.

Journal of photochemistry and photobiology. B, Biology·2026

Same journal

Metal-Organic Framework Monoliths Derived from Emulsion-Templated Foams for Reactive Filtration.

ACS applied materials & interfaces·2026

Same journal

Binary to Quaternary Rare-Earth Phosphates: Compositional Effects on Thermal Properties and CMAS Corrosion Resistance of Environmental Barrier Coatings.

ACS applied materials & interfaces·2026

Same journal

Suture-Free Piezoelectric Band-Aid Membrane for Complex Peripheral Nerve Defects.

ACS applied materials & interfaces·2026

Same journal

Single-Precursor to Dual-Function: A Transformable Metal-Organic Framework Nanoplatform for Photocatalytic H<sub>2</sub> Evolution and CO<sub>2</sub> Reduction.

ACS applied materials & interfaces·2026

Same journal

Surfactant-Templated Synthesis of Mg-Stabilized High-Loading Co Single Atoms in Mesoporous Silica Featuring Robust Co-O Bonds for Efficient Peroxymonosulfate Activation.

ACS applied materials & interfaces·2026

Same journal

Toughening Driven by Interphase Tuning in Bioinspired Nanocomposites: From Structural Engineering to Scalable Fabrication.

ACS applied materials & interfaces·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Apr 28, 2026

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

Published on: June 28, 2017

Solid-state photogalvanic dye-sensitized solar cells.

Seare A Berhe¹, Habtom B Gobeze, Sundari D Pokharel

¹Department of Chemistry, University of North Texas , Denton, Texas 76203, United States.

ACS Applied Materials & Interfaces

|May 31, 2014

Summary

This summary is machine-generated.

This study explores thermal electron injection in dye-semiconductor systems using titanium dioxide nanorods. Solid-state cells show better performance than liquid-junction cells for these photoelectrochemical applications.

More Related Videos

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

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

Published on: September 12, 2014

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

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

Published on: August 23, 2012

Related Experiment Videos

Last Updated: Apr 28, 2026

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

Published on: June 28, 2017

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

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

Published on: September 12, 2014

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

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

Published on: August 23, 2012

Area of Science:

Photochemistry
Electrochemistry
Materials Science

Background:

Photogalvanic cells utilize photoelectrochemical systems where the semiconductor electrode isn't the primary site of photoinduced charge formation.
Exploiting secondary (thermal) electron injection at dye-semiconductor interfaces offers a pathway to study electron transfer at minimal driving force.

Purpose of the Study:

To investigate thermal electron transfer from molecular sensitizers to nanostructured titanium dioxide (TiO2) electrodes.
To assemble and test photoelectrochemical cells employing these systems.

Main Methods:

Transient spectroscopy was employed to analyze electron transfer dynamics.
Photoelectrochemical cells were constructed and evaluated using electron-accepting dyes and an arylamine electron donor.

Main Results:

Thermal injection from a naphthacenequinone radical anion to TiO2 was characterized as a multiexponential decay with initial lifetimes of 6 and 27 ps.
Stark shifts due to ambient electric fields complicated kinetic estimations for fullerene sensitizers.
Electron-accepting dyes demonstrated superior performance in solid-state photoelectrochemical cells compared to liquid-junction cells.

Conclusions:

Solid-state cells offer kinetic advantages for dye-sensitized TiO2 systems utilizing thermal injection, mitigating photoinduced acceptor-quenching.
The findings advance the understanding of electron transfer mechanisms in advanced photoelectrochemical devices.