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Related Concept Videos

Gravimetry: Inorganic And Organic Precipitating Agents00:49

Gravimetry: Inorganic And Organic Precipitating Agents

7.1K
In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
7.1K
Quantum Numbers02:43

Quantum Numbers

52.3K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
52.3K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

59.7K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
59.7K
Alkyl Halides02:45

Alkyl Halides

20.1K
Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
20.1K
The Dot Product01:26

The Dot Product

266
Measuring how one directional quantity affects another along a specific path involves comparing their orientation and strength. When two such quantities are represented using direction and amount, a numerical result is computed to show how much one acts along the path of the other. This result comes from a rule combining both inputs' horizontal and vertical parts and adding the results.This calculation gives a single value that grows larger when both inputs point in similar directions and...
266
Dot Product01:29

Dot Product

1.0K
The dot product is an essential concept in mathematics and physics.
In engineering, the dot product of any two vectors is the product of the magnitudes of the vectors and the cosine of the angle between them. It is denoted by a dot symbol between the two vectors.
Consider a vehicle pulling an object along the ground using a rope. If the rope makes an angle with the horizontal axis, the work done can be calculated using the dot product of the force applied and the object's displacement.
The dot...
1.0K

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Related Experiment Video

Updated: Feb 13, 2026

Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications
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Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications

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Inorganic-Organic Multicoating Layer Encapsulation of Formamidine Lead Halide Perovskite Quantum Dots for Lighting

Ling Hsuan Chung1, Andi Magattang Gafur Muchlis1, Po-Chun Li1

  • 1Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106334, Taiwan.

ACS Applied Materials & Interfaces
|February 11, 2026
PubMed
Summary

Pure-green perovskite quantum dots (PQDs) were stabilized using a cost-effective dual-interface encapsulation strategy. This hierarchical multicoating enhances durability for optoelectronic applications without compromising optical performance.

Keywords:
dicyclopentanyl methacrylateformamidinium lead bromideinorganic SiOxmulticoating layerperovskite quantum dots

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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optoelectronics

Background:

  • Formamidinium lead bromide (FAPbBr3) perovskite quantum dots (PQDs) offer attractive pure-green emission for displays and lighting.
  • PQDs suffer from poor stability due to environmental factors (light, heat, water, oxygen), leading to degradation and performance loss.
  • Existing stabilization methods often involve complex processes or compromise optical properties.

Purpose of the Study:

  • To develop a cost-effective and scalable dual-interface encapsulation strategy for stabilizing pure-green FAPbBr3 PQDs.
  • To enhance the environmental durability of PQDs while preserving their excellent optical characteristics.
  • To demonstrate a viable pathway for industrial application of stable PQDs.

Main Methods:

  • A hierarchical multicoating approach using SiO(x) and dicyclopentanyl methacrylate (513M) was employed.
  • (3-aminopropyl) triethoxysilane (APTES) served as a coupling agent for SiO(x) coating, followed by radical polymerization of 513M to form a secondary hydrophobic polymer shell.
  • The FAPbBr3@SiO(x)@513M composite was synthesized and characterized for its structural integrity and optical properties.

Main Results:

  • The FAPbBr3@SiO(x)@513M composite exhibited significantly improved environmental durability compared to bare PQDs.
  • Maintained excellent optical properties, including green emission at ~532 nm, a narrow spectral width (FWHM ≤ 28 nm), and high photoluminescence quantum yield (>50%).
  • The encapsulation strategy prevented degradation without requiring expensive materials or compromising optical performance.

Conclusions:

  • The proposed dual-interface encapsulation strategy effectively stabilizes pure-green FAPbBr3 PQDs using scalable and low-cost materials.
  • This method offers a practical route for developing robust, solid-state PQD materials for optoelectronic devices.
  • The approach demonstrates that high PQD stability can be achieved without sacrificing optimal optical performance.