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

Colloids03:22

Colloids

21.2K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
21.2K
Quantum Numbers02:43

Quantum Numbers

50.8K
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.
50.8K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

58.1K
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.
58.1K
Colloids and Suspensions01:17

Colloids and Suspensions

3.5K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
3.5K
Zener Diodes01:16

Zener Diodes

1.2K
Zener diodes are specialized semiconductor devices designed to operate in the reverse breakdown region, where they allow current to flow into the cathode, making it positive relative to the anode. This reverse operation distinguishes Zener diodes from conventional diodes and enables their use in various applications, most notably as voltage regulators. One of the defining characteristics of Zener diodes is their nearly vertical I-V (current-voltage) characteristic curve above a certain...
1.2K
Colloidal precipitates01:09

Colloidal precipitates

6.5K
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...
6.5K

You might also read

Related Articles

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

Sort by
Same author

Ultrafast photoreduction driven by interfacial spin exchange in manganese-doped quantum dots.

Nature communications·2026
Same author

Interplay of Conventional and Spin-Exchange Auger Recombination in Magnetically Doped Quantum Dots.

ACS nano·2026
Same author

Colossal Photovoltaic Current in Ferroelectric Oxide by Constructing Defect Band.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Positive Aging-Free Quantum Dot Light-Emitting Diodes Enabled by Single-Source Chloride-Doped ZnMgO Electron Transport Layers.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Tailoring light emission in colloidal nanocrystals through lattice distortion engineering.

Nature communications·2026
Same author

Dual-Color Tunable Circularly Polarized Luminescence With Anti-Thermal-Quenching Enabled by Asymmetric Hydrogen-Bonding Networks in Hybrid Manganese Halides.

Advanced materials (Deerfield Beach, Fla.)·2026

Related Experiment Video

Updated: Feb 5, 2026

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

9.2K

Droop-Free Colloidal Quantum Dot Light-Emitting Diodes.

Jaehoon Lim1,2, Young-Shin Park1,3, Kaifeng Wu1

  • 1Chemistry Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States.

Nano Letters
|September 11, 2018
PubMed
Summary
This summary is machine-generated.

Engineered quantum dot–light-emitting diodes (QD-LEDs) achieve high efficiency at unprecedented brightness without performance roll-off. This breakthrough overcomes limitations for advanced display and lighting applications.

Keywords:
Auger recombinationLEDQuantum dotcharged excitonefficiency drooplight-emitting diodetrion

More Related Videos

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
07:44

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Published on: November 16, 2018

9.4K
Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
11:16

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles

Published on: August 7, 2016

10.2K

Related Experiment Videos

Last Updated: Feb 5, 2026

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

9.2K
Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
07:44

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Published on: November 16, 2018

9.4K
Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles
11:16

Correlative Light- and Electron Microscopy Using Quantum Dot Nanoparticles

Published on: August 7, 2016

10.2K

Area of Science:

  • Materials Science
  • Optoelectronics
  • Nanotechnology

Background:

  • Colloidal semiconductor quantum dots (QDs) offer solution-processable light-emitting diodes (LEDs) with tunable emission and high photostability.
  • Current QD-LEDs achieve high efficiency but suffer from significant performance roll-off at higher current densities, limiting brightness and longevity.

Purpose of the Study:

  • To develop QD-LEDs that maintain high efficiency at high brightness levels, overcoming the efficiency droop phenomenon.
  • To engineer quantum dots with improved charge injection balance and suppressed Auger recombination for enhanced device performance.

Main Methods:

  • Fabrication of QD-LEDs utilizing specially engineered QDs with a compositionally graded interlayer and a final barrier layer.
  • Characterization of QD-LED performance, including internal quantum efficiency and brightness at various current densities.

Main Results:

  • Demonstrated QD-LEDs with high internal efficiencies (up to 70%) that are virtually droop-free up to brightness levels exceeding 100,000 cd m⁻².
  • Achieved this performance at high current densities (∼500 mA cm⁻²), indicating suppressed Auger recombination and improved charge balance.

Conclusions:

  • The engineered QD design effectively mitigates efficiency losses at high currents, enabling droop-free operation.
  • These results highlight the potential of the developed QDs for future ultrabright, highly efficient indoor and outdoor lighting and display applications.