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

Ionic Crystal Structures

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...

You might also read

Related Articles

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

Sort by

Same author

Solvent Esterification and Stoichiometric Control in Ambient-Grown FAPbI<sub>3</sub> Single-Crystal Solar Cells.

Journal of the American Chemical Society·2026

Same author

Nanoscale amorphization of poly(triarylamine) for efficient and stable inverted perovskite photovoltaics.

Nature nanotechnology·2026

Same author

Scalable Atomically Interfaced Heterostructure Photoelectrodes for Broadband Solar Energy Harvesting and Stable Li-Ion Storage.

Nano letters·2026

Same author

Quantum well-inspired energy level design in multicomponent organic solar cells for improved energy loss management.

Materials horizons·2026

Same author

2D Semiconductor Nanosheets Supported on Colloidal Quantum Cubes.

ACS nano·2026

Same author

Multicolor Emission in Perovskite Nanostructures via Quantum Confinement Engineering for High-Speed Optical Wireless Communication.

ACS nano·2026

Search research articles

Related Experiment Video

Updated: Jun 14, 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

Mapping Surface-Defect and Ions Migration in Mixed-Cation Perovskite Crystals.

Razan O Nughays¹, Khulud Almasabi^2,3, Sarvarkhodzha Nematulloev¹

¹Advanced Membranes and Porous Materials Center (AMPM), Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|August 29, 2024

Summary

This summary is machine-generated.

Single crystal perovskites with higher formamidinium (FA) content show longer charge carrier lifetimes due to reduced surface defects. Ion migration plays a key role in passivating these defects, improving optoelectronic performance.

Keywords:

DFT electron imaging ion migrations perovskites surface

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: Jun 14, 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
Solid-State Physics
Photovoltaics

Background:

Single crystal perovskites are promising for optoelectronic devices.
Surface properties significantly impact perovskite performance, but are often overlooked.
Understanding charge carrier dynamics at the nanoscale is crucial.

Purpose of the Study:

To investigate the role of cation composition in surface defect formation and charge carrier dynamics.
To correlate ion migration with surface passivation and device performance.
To explore advanced techniques for probing nanoscale phenomena in perovskites.

Main Methods:

Utilized 4D ultrafast scanning electron microscopy (4D-USEM) to study photogenerated carrier transport within the top nanometers.
Employed density functional theory (DFT) to analyze defect centers and ion migration pathways.
Investigated two mixed-cation perovskite compositions: FA_0.6MA_0.4PbI₃ and FA_0.4MA_0.6PbI₃.

Main Results:

FA_0.6MA_0.4PbI₃ exhibited longer charge carrier lifetimes than FA_0.4MA_0.6PbI₃, attributed to higher surface defect density.
DFT calculations confirmed lower energy barriers for iodide ion migration to the surface in higher FA content samples.
Ion migration effectively passivates surface vacancies, leading to fewer defects and prolonged carrier lifetimes.

Conclusions:

Cation selection critically influences charge carrier transport and defect formation in single crystal perovskites.
Controlling ion migration is essential for managing surface vacancies and enhancing optoelectronic device performance.
This study highlights the importance of nanoscale surface characterization for advancing perovskite technology.