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

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

Crystal Field Theory - Tetrahedral and Square Planar Complexes

Crystal Field Theory - Tetrahedral and Square Planar Complexes

Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...

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...

You might also read

Related Articles

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

Sort by

Same author

Dose-Dependent and Irreversible Photodarkening of InP/ZnSe/ZnS Quantum Dots.

ACS nano·2026

Same author

High-performance red light-emitting diodes from quasi-two-dimensional perovskite nanocrystals.

Nature communications·2026

Same author

Ultrafast Thermometry of Gold Nanoparticles: Resolving Particle and Medium Temperature Dynamics via Transient Absorption Spectroscopy.

ACS nano·2026

Same author

Computational screening of piezoelectric constants in metal-organic frameworks: design principles and ferroelectric-like bond modulation.

Journal of materials chemistry. A·2026

Same author

Electrochemical Control over Electron Density of InAs Quantum Dots.

Journal of the American Chemical Society·2026

Same author

Carrier Diffusion Links Single Crystal Quality and Photoluminescence in Halide Perovskite Radiation Detectors.

Advanced materials (Deerfield Beach, Fla.)·2025

Search research articles

Related Experiment Video

Updated: Jul 19, 2025

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

Tuning the Driving Force for Charge Transfer in Perovskite-Chromophore Systems.

Zimu Wei¹, Jence T Mulder¹, Rajeev K Dubey¹

¹Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands.

The Journal of Physical Chemistry. C, Nanomaterials and Interfaces

|August 16, 2023

Summary

Investigating perovskite-chromophore systems reveals charge transfer mechanisms. Tuning the driving force controls charge transfer rates, guiding optoelectronic and light-harvesting applications.

More Related Videos

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

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

Published on: February 27, 2017

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

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

Published on: September 8, 2017

Related Experiment Videos

Last Updated: Jul 19, 2025

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Monovalent Cation Doping of CH3NH3PbI3 for Efficient Perovskite Solar Cells

Published on: March 19, 2017

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

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

Published on: February 27, 2017

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

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

Published on: September 8, 2017

Area of Science:

Materials Science
Photophysics
Nanotechnology

Background:

Perovskite-chromophore hybrid systems are promising for optoelectronics, photocatalysis, and light-harvesting.
Understanding interfacial charge transfer (CT) kinetics and energetics is key to optimizing these systems.

Purpose of the Study:

To investigate the mechanism of interfacial CT between CsPbBr3 nanoplatelets (NPLs) and perylene derivatives.
To explore controlling CT rates by tuning the driving force through acceptor modification and NPL bandgap engineering.

Main Methods:

Steady-state optical characterizations.
Transient absorption spectroscopy.
Systematic tuning of CT driving force via acceptor electron affinity and NPL bandgap (quantum confinement).

Main Results:

Charge-separated states formed by selective excitation of donors or acceptors.
Picosecond hole transfer observed from perylene to CsPbBr3 NPLs upon acceptor excitation, following Marcus normal regime.
Absence of Marcus behavior upon donor excitation suggests energy transfer followed by ultrafast hole transfer.

Conclusions:

Elucidated photophysical mechanisms in perovskite-molecule hybrid systems.
Provided guidelines for tailoring hybrid systems by controlling interfacial CT.
Demonstrated tunability of CT rates for enhanced optoelectronic applications.