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

Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

2.0K
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
2.0K
Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

52.6K
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...
52.6K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.5K
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.
2.5K
VSEPR Theory and the Effect of Lone Pairs04:01

VSEPR Theory and the Effect of Lone Pairs

46.1K
Effect of Lone Pairs of Electrons on Molecule Geometry
46.1K
Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

36.6K
sp3d and sp3d 2 Hybridization
36.6K
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

3.2K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
3.2K

You might also read

Related Articles

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

Sort by
Same author

Connecting the Dots: Discovery of the (M<b><sub>2</sub></b>Q<b><sub>3</sub></b>)<b><sub>2</sub></b>(AMQ<b><sub>2</sub></b>)<b><i><sub>n</sub></i></b> Homologous Series through Cs<b><sub>5</sub></b>Bi<b><sub>9</sub></b>S<b><sub>16</sub></b> (<i>n</i> = 5).

Inorganic chemistry·2026
Same author

Bypassing the yellow phase for extremely stable formamidinium lead iodide perovskite solar cells.

Science (New York, N.Y.)·2026
Same author

Mitigating Electrochemical Degradation in CsPbBr<sub>3</sub> Gamma Detectors by Organic and Inorganic Encapsulation.

ACS applied materials & interfaces·2026
Same author

Scalable, low-cost ink-based processing of high-performance silver selenide thermoelectrics.

Materials horizons·2026
Same author

Computational Discovery of Ultralow Thermal Conductivity in the Energy-Degenerate Polymorphic Crystal Family <b>A</b><sub><b>2</b></sub><b>M</b><sub><b>2</b></sub><b>M</b>'<b>Q</b><sub><b>4</b></sub>.

Journal of the American Chemical Society·2026
Same author

Organic Cation Influence on Organic-Inorganic Thermal Equilibration within 2D Metal Halide Perovskites.

Journal of the American Chemical Society·2026
Same journal

Solid-State NMR Quantification of Brønsted-Lewis Acid Site Cooperativity in Zeolites for Glucose Conversion.

The journal of physical chemistry letters·2026
Same journal

Ion-Pairing-Mediated Selective Transport of Rare Earth Elements through Functionalized Graphene Nanopores.

The journal of physical chemistry letters·2026
Same journal

Ligand-Tuned CISS-Effect of Atomically Precise Metal Oxido Nanoclusters.

The journal of physical chemistry letters·2026
Same journal

Data-Driven Exploration of the Polyethylene Catalyst Chemical Space via Machine Learning.

The journal of physical chemistry letters·2026
Same journal

Role of Ultrafast Electron-Thermal-Phonon Interactions in High Harmonic Generation and Dephasing from Graphene.

The journal of physical chemistry letters·2026
Same journal

Real-Time Vibrational Spectroscopy Reveals an Inversion Transition State in the Photoisomerization of Phenylazoimidazole.

The journal of physical chemistry letters·2026
See all related articles

Related Experiment Video

Updated: Oct 19, 2025

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications
07:42

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications

Published on: January 22, 2019

11.3K

Excitons in CsPbBr3 Halide Perovskite.

J A Peters1,2, Z Liu1, O Bulgin2

  • 1Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States.

The Journal of Physical Chemistry Letters
|September 20, 2021
PubMed
Summary
This summary is machine-generated.

Photoluminescence spectroscopy revealed that intrinsic disorder and electron-phonon coupling in CsPbBr3 single crystals create shallow states influencing exciton behavior. Understanding these states is key to improving perovskite optoelectronic properties.

More Related Videos

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
08:30

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

16.8K
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
08:12

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

Published on: September 8, 2017

9.7K

Related Experiment Videos

Last Updated: Oct 19, 2025

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications
07:42

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications

Published on: January 22, 2019

11.3K
Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells
08:30

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

16.8K
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
08:12

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

Published on: September 8, 2017

9.7K

Area of Science:

  • Materials Science
  • Solid State Physics
  • Optoelectronics

Background:

  • Halide perovskites like CsPbBr3 are promising for optoelectronic devices.
  • Exciton dynamics and electronic states are crucial for device performance.
  • Understanding charge carrier behavior in CsPbBr3 is essential for technological applications.

Purpose of the Study:

  • To investigate the nature of electronic states and exciton behavior in CsPbBr3 single crystals.
  • To determine the influence of temperature, disorder, and electron-phonon coupling on photoluminescence.
  • To elucidate the recombination mechanisms and lifetimes of excitons.

Main Methods:

  • Photoluminescence (PL) spectroscopy was employed to study Bridgman-grown CsPbBr3 single crystals.
  • Temperature-dependent PL measurements were performed to analyze emission properties.
  • Transient photoluminescence decay was measured to determine exciton lifetimes.

Main Results:

  • Photoluminescence intensity is strongly temperature-dependent, with shallow below-bandgap tail states dominating at low temperatures.
  • Strong electron-phonon coupling (Huang-Rhys parameter S = 3.81, 1.51) was observed, leading to small polarons and trapped/bound excitons.
  • Average photoluminescence lifetimes were determined as ~17 ns for free excitons and ~38 ns for trapped/bound excitons.
  • Edge states are linked to native defects and phase transition twinning.

Conclusions:

  • Intrinsic disorder and strong electron-phonon coupling significantly influence exciton emission in CsPbBr3.
  • Small polarons and trapped excitons play a critical role in the recombination processes.
  • Minimizing trapping sites could enhance charge transport, carrier lifetimes, and detector performance in CsPbBr3 devices.