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

Precipitation Reactions03:10

Precipitation Reactions

In a precipitation reaction, aqueous solutions of soluble salts react to give an insoluble ionic compound – the precipitate. The reaction occurs when oppositely charged ions in solution overcome their attraction for water and bind to each other, forming a precipitate that separates out from the solution. Since such reactions involve the exchange of ions between ionic compounds in aqueous solution, they are also referred to as double displacement, double replacement, exchange reactions, or...
Factors Affecting Solubility04:01

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
P-N junction01:11

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

Tetraphosphorylated phthalocyanine-based self-assembled monolayer stabilizes perovskite photovoltaics.

Science advances·2026
Same author

Novel Bilayer Strategy Developing Dual-Functional Spray-Pyrolyzed NiO<sub><i>x</i></sub> toward High-Performance Perovskite Solar Cells.

ACS applied materials & interfaces·2026
Same author

Interpersonal Psychotherapy in the Chinese Cultural Context: Exploring the Problem Areas With Cultural Specificity.

American journal of psychotherapy·2026
Same author

An outbreak of endogenous fungal endophthalmitis in immunocompetent individuals caused by presumed intravenous infusion contamination.

Frontiers in cellular and infection microbiology·2026
Same author

Mitochondrial metabolic dysfunction drives PANoptosis in retinal pigment epithelium during fungal endophthalmitis: emerging roles of the MITF-FBXW7 axis.

Frontiers in immunology·2026
Same author

Identification of the Dominant Rainfall Index and Evolution of Multi-Factor Driving Mechanisms for Landslide Activity in Hong Kong (1990-2024).

Sensors (Basel, Switzerland)·2026

Related Experiment Video

Updated: Jun 13, 2026

Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology
11:42

Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology

Published on: May 15, 2012

24.6K

Degradable Additive Couple Enable Pure and Stable Alpha-Phase FAPbI3 for Perovskite Solar Cells.

Xuesong Lin1, Hongzhen Su1,2, Xiangqian Shen1

  • 1State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240, China.

Advanced Materials (Deerfield Beach, Fla.)
|March 28, 2025
PubMed
Summary

Researchers developed a new method for stable, pure black-phase formamidinium lead iodide (FAPbI3) perovskites. This advancement enhances solar cell efficiency and stability, paving the way for improved photovoltaic technologies.

Keywords:
a pair of sacrificial agentsideal bandgappure black‐phase FAPbI3tensile strainthermal stability

More Related Videos

Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions
06:56

Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions

Published on: October 10, 2013

39.6K
Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery
08:09

Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery

Published on: August 6, 2019

5.7K

Related Experiment Videos

Last Updated: Jun 13, 2026

Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology
11:42

Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology

Published on: May 15, 2012

24.6K
Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions
06:56

Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions

Published on: October 10, 2013

39.6K
Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery
08:09

Methionine Functionalized Biocompatible Block Copolymers for Targeted Plasmid DNA Delivery

Published on: August 6, 2019

5.7K

Area of Science:

  • Materials Science
  • Photovoltaics
  • Solid-state Chemistry

Background:

  • Pure black-phase formamidinium lead iodide (FAPbI3) is highly desirable for solar cells due to its optimal bandgap and thermal stability.
  • Achieving a stable, pure black-phase FAPbI3 has been a significant challenge in perovskite solar cell research.

Purpose of the Study:

  • To develop a method for oriented growth of pure black-phase FAPbI3.
  • To enhance the stability and efficiency of FAPbI3-based solar devices.
  • To investigate the role of sacrificial agents in controlling perovskite phase and crystal orientation.

Main Methods:

  • Utilized a combination of diethylamine hydrochloride (DEACl) and formamide (Fo) as sacrificial agents.
  • Employed aminolysis reaction during perovskite annealing to remove sacrificial agents.
  • Investigated the crystal structure and strain effects on FAPbI3.
  • Fabricated and tested perovskite solar cell devices with the optimized FAPbI3 material.

Main Results:

  • Achieved oriented growth of black-phase FAPbI3 along the (111) direction.
  • Retained the ideal bandgap (Eg) of 1.49 eV for FAPbI3.
  • Mitigated tensile strain in FAPbI3 through FA+ cation tilting, stabilizing the black phase.
  • Demonstrated high power conversion efficiencies of 25.2% (0.09 cm2) and 24.2% (1.04 cm2).
  • Showcased excellent operational stability, maintaining 91.68% of initial efficiencies after 1080 hours under 1-sun illumination.

Conclusions:

  • The developed method successfully produces pure, stable, (111)-oriented black-phase FAPbI3.
  • The sacrificial agent approach effectively controls phase and orientation, leading to high-performance perovskite solar cells.
  • The stabilized FAPbI3 exhibits remarkable efficiency and long-term operational stability, indicating its potential for commercial solar applications.