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

1.5K
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...
1.5K
UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

7.0K
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent...
7.0K
UV–Vis Spectroscopy: Woodward–Fieser Rules01:29

UV–Vis Spectroscopy: Woodward–Fieser Rules

24.5K
UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given...
24.5K
VSEPR Theory and the Effect of Lone Pairs04:01

VSEPR Theory and the Effect of Lone Pairs

42.4K
Effect of Lone Pairs of Electrons on Molecule Geometry
42.4K
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview

2.7K
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
2.7K
Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

47.1K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
47.1K

You might also read

Related Articles

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

Sort by
Same author

Unraveling the dynamics of multiple excited states in a single-molecule transistor.

Nature communications·2026
Same author

Single Crystals of Perylene Diimide-Based Two-Dimensional Covalent Organic Frameworks.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Interfacial dipolar interactions drive giant second-harmonic generation in 2D organic-inorganic heterostructures.

Nature communications·2026
Same author

Imaging the flat bands of magic-angle graphene reshaped by interactions.

Nature·2026
Same author

Microscopic Insights into Magneto-optics and Magneto-transport in 2D Perovskites.

Nano letters·2026
Same author

Spin Injection and Emission Helicity Switching in a 2D Perovskite/WSe<sub>2</sub> Heterostructure.

Nano letters·2026
Same journal

Bridging nanotechnology and mechanobiology.

Nature nanotechnology·2026
Same journal

Coherent 2D/3D van der Waals epitaxy enables single-crystal perovskite heterostructures.

Nature nanotechnology·2026
Same journal

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

Nature nanotechnology·2026
Same journal

Ultrafast, reconfigurable all-optical beam steering and spatial light modulation.

Nature nanotechnology·2026
Same journal

A high-energy hydrogen radical initiates efficient electrosynthesis of urea from CO<sub>2</sub> and N<sub>2</sub>.

Nature nanotechnology·2026
Same journal

Machine-intelligent multimodal algebot for intracavitary chemotherapy.

Nature nanotechnology·2026
See all related articles

Related Experiment Video

Updated: Jul 9, 2025

Close-Space Sublimation-Deposited Ultra-Thin CdSeTe/CdTe Solar Cells for Enhanced Short-Circuit Current Density and Photoluminescence
12:21

Close-Space Sublimation-Deposited Ultra-Thin CdSeTe/CdTe Solar Cells for Enhanced Short-Circuit Current Density and Photoluminescence

Published on: March 6, 2020

8.2K

Ultraviolet interlayer excitons in bilayer WSe2.

Kai-Qiang Lin1,2, Paulo E Faria Junior3, Ruven Hübner4

  • 1State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China. kaiqiang.lin@xmu.edu.cn.

Nature Nanotechnology
|December 4, 2023
PubMed
Summary
This summary is machine-generated.

Researchers discovered ultraviolet-emitting interlayer excitons in bilayer WSe2, expanding their energy range for novel electronic and quantum devices. These high-lying excitations offer tunable properties and sensing capabilities.

More Related Videos

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

12.4K
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.0K

Related Experiment Videos

Last Updated: Jul 9, 2025

Close-Space Sublimation-Deposited Ultra-Thin CdSeTe/CdTe Solar Cells for Enhanced Short-Circuit Current Density and Photoluminescence
12:21

Close-Space Sublimation-Deposited Ultra-Thin CdSeTe/CdTe Solar Cells for Enhanced Short-Circuit Current Density and Photoluminescence

Published on: March 6, 2020

8.2K
Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

12.4K
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.0K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Optics

Background:

  • Interlayer excitons in van der Waals heterostructures are crucial for exciton condensation and quantum emitters.
  • Current research primarily focuses on near-infrared spectral regions near band edges.

Purpose of the Study:

  • To explore above-gap analogues of interlayer excitons in bilayer WSe2.
  • To identify and characterize neutral and charged interlayer excitons in the ultraviolet spectrum.
  • To investigate their potential for advanced applications and sensing.

Main Methods:

  • Optical spectroscopy of bilayer WSe2.
  • Analysis of photoluminescence spectra.
  • Investigation of Stark effect and electric field tuning.

Main Results:

  • Identification of neutral and charged interlayer excitons emitting in the ultraviolet.
  • Observation of narrow linewidths (1.8 meV) for these high-lying excitations.
  • Significant binding energies (20-30 meV) for interlayer trions, enabling tunability.
  • Demonstration of switchable dipole orientations and prominent Stark splitting.
  • Sensitivity to interlayer twist angle, enabling moiré physics exploration.

Conclusions:

  • The study expands the accessible energy range for interlayer exciton applications by over a factor of two.
  • High-lying interlayer excitons and trions offer new avenues for tunable optoelectronic devices.
  • Stark splitting of trions provides a novel method for measuring interlayer electric fields.
  • These findings open possibilities for exploring emergent moiré physics under electrical control.