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

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...
Biasing of P-N Junction01:16

Biasing of P-N Junction

The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
Bipolar Junction Transistor01:22

Bipolar Junction Transistor

Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational characteristics.
The structure...
Types of Semiconductors01:20

Types of Semiconductors

Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...

You might also read

Related Articles

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

Sort by
Same author

In situ elucidation of the formation mechanism of donor-acceptor complexes responsible for exciplex generation.

Communications chemistry·2026
Same author

Asymmetric organic NIR chromophores for bioimaging and phototherapy.

Nanoscale·2026
Same author

Asymmetric Diphosphane Dioxides With A-π-A-π'-D Scaffolds for High-Purity Deep-Blue Luminescence.

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

Planar rotor-enabled quenching-resistant NIR-II fluorophores for high-contrast bioimaging and efficient cancer phototheranostics.

Materials horizons·2026
Same author

Interlocked Rotaxane Enables TADF with Distinct Excited-State Structural Relaxation.

Journal of the American Chemical Society·2026
Same author

Single-Carbon Bridged Pentacene Dimers Enable Efficient Singlet Fission and Quintet State Stabilization.

Journal of the American Chemical Society·2026

Related Experiment Video

Updated: Jun 30, 2026

Development of Efficient OLEDs from Solution Deposition
07:09

Development of Efficient OLEDs from Solution Deposition

Published on: November 4, 2022

An ambipolar host material provides highly efficient saturated red PhOLEDs possessing simple device structures.

Wen-Yi Hung1, Tsung-Cheng Tsai, Sung-Yu Ku

  • 1Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung, Taiwan 202. wenhung@mail.ntou.edu.tw

Physical Chemistry Chemical Physics : PCCP
|September 27, 2008
PubMed
Summary

Researchers developed a highly efficient red electrophosphorescent device using a novel host material. This device achieves saturated red emission and impressive external quantum efficiency, paving the way for advanced display technologies.

More Related Videos

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

Step-by-Step Guide for Harnessing Organic Light Emitting Diodes by Solution Processed Device Fabrication of a TADF Emitter
06:25

Step-by-Step Guide for Harnessing Organic Light Emitting Diodes by Solution Processed Device Fabrication of a TADF Emitter

Published on: November 7, 2025

Related Experiment Videos

Last Updated: Jun 30, 2026

Development of Efficient OLEDs from Solution Deposition
07:09

Development of Efficient OLEDs from Solution Deposition

Published on: November 4, 2022

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

Step-by-Step Guide for Harnessing Organic Light Emitting Diodes by Solution Processed Device Fabrication of a TADF Emitter
06:25

Step-by-Step Guide for Harnessing Organic Light Emitting Diodes by Solution Processed Device Fabrication of a TADF Emitter

Published on: November 7, 2025

Area of Science:

  • Materials Science
  • Organic Electronics
  • Photophysics

Background:

  • Electrophosphorescent devices are crucial for efficient light emission.
  • Developing stable and efficient red emitters remains a challenge.
  • Novel host materials are needed to improve device performance.

Purpose of the Study:

  • To develop a highly efficient red electrophosphorescent device.
  • To investigate the performance of a novel ambipolar spiro-configured donor-acceptor host material (D2ACN).
  • To achieve saturated red emission and high external quantum efficiency.

Main Methods:

  • Doping an iridium complex (Mpq(2)Iracac) into a novel ambipolar spiro-configured donor-acceptor host material (D2ACN).
  • Fabrication of a simple device configuration.
  • Characterization of electroluminescent properties, including emission spectra and external quantum efficiency.

Main Results:

  • The developed device exhibited saturated red emission.
  • An impressive external quantum efficiency of 10.8% (photons/electron) was achieved.
  • The device demonstrated high efficiency with a simple configuration.

Conclusions:

  • A highly efficient red electrophosphorescent device was successfully developed.
  • The novel D2ACN host material is effective for achieving high performance in red electrophosphorescent devices.
  • This work contributes to the advancement of efficient organic light-emitting diode technology.