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

UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

2.3K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
2.3K
Switching of BJT01:22

Switching of BJT

617
Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...
617
Photoelectric Effect02:26

Photoelectric Effect

37.4K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
37.4K
Photoluminescence: Applications01:14

Photoluminescence: Applications

745
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
745
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.7K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.7K
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

671
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
671

You might also read

Related Articles

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

Sort by
Same author

Immune-tumor cell ligand-receptor axes driving metabolic reprogramming and therapeutic resistance in cancer.

Frontiers in immunology·2026
Same author

Switchable band alignment in 2D-perovskite/WS<sub>2</sub>heterostructures for tunable exciton transport and valley polarization.

Reports on progress in physics. Physical Society (Great Britain)·2026
Same author

NFYB-lncRNA axis resets the tumor microenvironment to promote HCC aggressive progression by a positive feedback loop.

Acta pharmaceutica Sinica. B·2026
Same author

Unveiling Lipid Metabolism-Related Gene PTGDS: A Tumor Suppressor in Lung Adenocarcinoma with Therapeutic Potential.

Cancers·2026
Same author

Coherent 2D-3D van der Waals perovskite epitaxial heterostructures.

Nature nanotechnology·2026
Same author

Dietary purple sweet potato anthocyanin extracts attenuate intestinal barrier decline in naturally aged mice <i>via</i> the microbiota-autophagy-stem cell axis.

Food & function·2026
Same journal

Anion-Engineered Organic Electrochemical Transistors With Multi-Timescale Synaptic Dynamics for Task-Adaptive Spiking Neural Networks.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same journal

Dimensional Effect on the Lattice Anharmonicity in Graphene and Graphite.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same journal

A Modular Core-Shell Nanoparticle Platform for Dual-Modal MRI-Luminescence With High Relaxivity.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same journal

Highly Selective Construction of D<sub>2</sub>-Symmetric Chiral Carbon Nanorings and the Diverse Assembly With Fullerenes.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same journal

A Synergistic Process Optimization and Data-Driven Modeling Strategy for Unraveling and Enhancing the Low-Light Response in Back-Contact Solar Cells.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same journal

Porous Hydrogel-Mediated One-Step Selection of Mannoprotein-Targeted Aptamers for Early Diagnosis of Invasive Saccharomyces cerevisiae Infections.

Small (Weinheim an der Bergstrasse, Germany)·2026
See all related articles

Related Experiment Video

Updated: Nov 21, 2025

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
10:33

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

Published on: February 27, 2019

8.7K

Room-Temperature Exciton-Based Optoelectronic Switch.

Tong Ye1, Boxuan Zhou1, Zeyi Liu1

  • 1School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, China.

Small (Weinheim an Der Bergstrasse, Germany)
|January 12, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed a room-temperature optoelectronic switch using excitons in WSe2. This device shows promise for faster photoelectric communication by bridging electronic and optical signals.

Keywords:
charge-drift effectexcitonoptoelectronic switchtransition metal dichalcogenides

More Related Videos

LED Thermo Flow &#8212; Combining Optogenetics with Flow Cytometry
05:49

LED Thermo Flow — Combining Optogenetics with Flow Cytometry

Published on: December 30, 2016

8.8K
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.8K

Related Experiment Videos

Last Updated: Nov 21, 2025

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
10:33

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

Published on: February 27, 2019

8.7K
LED Thermo Flow &#8212; Combining Optogenetics with Flow Cytometry
05:49

LED Thermo Flow — Combining Optogenetics with Flow Cytometry

Published on: December 30, 2016

8.8K
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.8K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Optoelectronics

Background:

  • Excitons, electron-hole pairs, are potential intermediaries for optoelectronic communication.
  • Room-temperature exciton-based logic devices, particularly switches, are currently underdeveloped.

Purpose of the Study:

  • To present a prototype room-temperature optoelectronic switch utilizing excitons in a WSe2 monolayer.
  • To investigate the behavior of WSe2 on different substrates for optoelectronic applications.

Main Methods:

  • Fabrication of a WSe2 monolayer device on Au and SiO2 substrates.
  • Characterization of WSe2 photoluminescence (PL) intensity under varying gate voltages.
  • Long-term cyclic PL switching tests to assess device stability.

Main Results:

  • WSe2 on Au and SiO2 substrates exhibited opposing emission intensity changes with applied gate voltages.
  • Observed phenomena attributed to substrate-dependent doping effects (charge-transfer vs. chemical doping) and charge-drift.
  • Demonstrated stable optoelectronic switching for over 4000 seconds.

Conclusions:

  • A novel approach for fabricating room-temperature exciton-based optoelectronic switches was presented.
  • The developed switch leverages unique doping and charge-drift effects in WSe2.
  • This technology is crucial for advancements in integrated nanophotonics and high-speed communication.