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

Ion Exchange01:17

Ion Exchange

1.1K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.1K
Precipitation of Ions03:11

Precipitation of Ions

29.7K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
29.7K
Thermal Sigmatropic Reactions: Overview01:16

Thermal Sigmatropic Reactions: Overview

2.4K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred...
2.4K
Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

14.5K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
14.5K
Carrier Transport01:21

Carrier Transport

875
The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
875

You might also read

Related Articles

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

Sort by
Same author

Metal Halide Perovskite Heterostructures: Blocking Anion Diffusion with Single-Layer Graphene.

Journal of the American Chemical Society·2023
Same author

Compositional texture engineering for highly stable wide-bandgap perovskite solar cells.

Science (New York, N.Y.)·2022
Same author

Temperature-Dependent Carrier Extraction and the Effects of Excitons on Emission and Photovoltaic Performance in Cs<sub>0.05</sub>FA<sub>0.79</sub>MA<sub>0.16</sub>Pb(I<sub>0.83</sub>Br<sub>0.17</sub>)<sub>3</sub> Solar Cells.

ACS applied materials & interfaces·2022
Same author

Surface reaction for efficient and stable inverted perovskite solar cells.

Nature·2022
Same author

Tuning the Excited-State Dynamics of CuI Films with Electrochemical Bias.

ACS energy letters·2019
Same author

Interfacial Charge Transfer between Excited CsPbBr<sub>3</sub> Nanocrystals and TiO<sub>2</sub>: Charge Injection versus Photodegradation.

The journal of physical chemistry letters·2018
Same journal

Anharmonic phonons via quantum thermal bath simulations.

The Journal of chemical physics·2026
Same journal

Quantum simulation of alignment dependent differential cross sections in co-propagating molecular beams at cold collision energies.

The Journal of chemical physics·2026
Same journal

Non-additive ion effects on the coil-globule equilibrium of a generic polymer in aqueous salt solutions.

The Journal of chemical physics·2026
Same journal

Insights into the unexpected small reduction of the temperature of maximum density of water by lithium chloride addition.

The Journal of chemical physics·2026
Same journal

Optical frequency comb double-resonance spectroscopy of the 9030-9175 cm-1 states of ethylene.

The Journal of chemical physics·2026
Same journal

Time reversal breaking of colloidal particles in cells.

The Journal of chemical physics·2026
See all related articles

Related Experiment Video

Updated: Jan 6, 2026

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

10.0K

Temperature-driven anion migration in gradient halide perovskites.

Rebecca A Scheidt1, Prashant V Kamat1

  • 1Radiation Research Laboratory and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA.

The Journal of Chemical Physics
|October 10, 2019
PubMed
Summary
This summary is machine-generated.

Cesium lead halide perovskite films with gradient band structures efficiently capture visible light. Annealing homogenizes these films, revealing insights into halide ion movement and charge carrier dynamics.

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

17.1K
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

19.0K

Related Experiment Videos

Last Updated: Jan 6, 2026

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

10.0K
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

17.1K
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
11:38

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

Published on: February 27, 2017

19.0K

Area of Science:

  • Materials Science
  • Solid-State Physics
  • Photovoltaics

Background:

  • Cesium lead halide perovskites (CsPbBr3-xIx) are promising photovoltaic materials.
  • Engineered band structures can enhance light absorption and charge carrier behavior.

Purpose of the Study:

  • To investigate the formation and properties of gradient band structures in CsPbBr3-xIx perovskite films.
  • To elucidate the halide ion movement during thermal homogenization.
  • To analyze the excited state processes and charge carrier dynamics.

Main Methods:

  • Fabrication of CsPbBr3-xIx films with varying iodide concentrations.
  • Thermal annealing of gradient films at 50-90 °C.
  • UV-Visible absorbance spectroscopy to track halide ion movement.
  • X-ray photoelectron spectroscopy (XPS) for compositional analysis.
  • Transient absorption spectroscopy to probe excited state dynamics.

Main Results:

  • Gradient band structures were successfully created in CsPbBr3-xIx films, enabling integrated visible photon capture.
  • Annealing led to film homogenization, with halide ion movement quantified.
  • The temperature-dependent rate constant and activation energy (74.5 kJ/mol) for halide homogenization were determined.
  • Transient absorption spectroscopy confirmed charge carrier flow and recombination in both gradient and homogenized films.

Conclusions:

  • Gradient halide perovskite films offer a pathway for enhanced light harvesting.
  • Understanding halide ion dynamics during thermal processing is crucial for device optimization.
  • The study provides fundamental insights into the photophysics of mixed-halide perovskites.