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

Power Factor Correction01:20

Power Factor Correction

321
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
321
Non-ohmic Devices00:51

Non-ohmic Devices

1.3K
In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A...
1.3K
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

567
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
567
Oscillations In An LC Circuit01:30

Oscillations In An LC Circuit

2.7K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
2.7K
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

1.1K
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
1.1K
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

415
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
415

You might also read

Related Articles

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

Sort by
Same author

Octahedral Dynamics and Local Symmetry in Hybrid Perovskite FAPbI<sub>3</sub> under Thermal Excitation.

ACS omega·2026
Same author

Probing the Surface Structure of Amine/Chloride-Passivated CdSe Nanocrystals Using Dynamic Nuclear Polarization-Enhanced <sup>15</sup>N, <sup>35</sup>Cl, <sup>77</sup>Se, and <sup>113</sup>Cd Solid-State NMR Spectroscopy.

Journal of the American Chemical Society·2026
Same author

Thin-Film Silicon Nanosheet-Based Neuromorphic Assemblies.

ACS applied materials & interfaces·2025
Same author

Boron monoxide is a one-dimensional polymer.

Chemical communications (Cambridge, England)·2025
Same author

Relativistic DFT Calculations of Cadmium and Selenium Solid-State NMR Spectra of CdSe Nanocrystal Surfaces.

ACS omega·2023
Same author

Mechano-Triboelectric Analysis of Surface Charge Generation on Replica-Molded Elastomeric Nanodomes.

Micromachines·2021

Related Experiment Video

Updated: Nov 9, 2025

Development of Efficient OLEDs from Solution Deposition
07:09

Development of Efficient OLEDs from Solution Deposition

Published on: November 4, 2022

2.4K

High Light Outcoupling Efficiency from Periodically Corrugated OLEDs.

Yu Zhang1, Rana Biswas1,2

  • 1Department of Electrical and Computer Engineering, and Microelectronics Research Center, Iowa State University, Ames, Iowa 50011, United States.

ACS Omega
|April 12, 2021
PubMed
Summary

Researchers developed a new theory for corrugated organic light-emitting diodes (OLEDs). This approach enhances light outcoupling efficiency to over 60%, significantly improving OLED performance and enabling brighter displays.

More Related Videos

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO
08:14

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO

Published on: July 31, 2016

12.4K
Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
12:08

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

10.9K

Related Experiment Videos

Last Updated: Nov 9, 2025

Development of Efficient OLEDs from Solution Deposition
07:09

Development of Efficient OLEDs from Solution Deposition

Published on: November 4, 2022

2.4K
Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO
08:14

Improved Heterojunction Quality in Cu2O-based Solar Cells Through the Optimization of Atmospheric Pressure Spatial Atomic Layer Deposited Zn1-xMgxO

Published on: July 31, 2016

12.4K
Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
12:08

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

10.9K

Area of Science:

  • Optoelectronics
  • Materials Science
  • Photonics

Background:

  • Organic light-emitting diodes (OLEDs) exhibit low light outcoupling efficiency (ηout < 20%) due to internal waveguiding and plasmonic losses.
  • Periodic internal corrugations offer a potential solution by diffracting trapped light modes back into the air cone.

Purpose of the Study:

  • To develop a rigorous theoretical framework for analyzing light emission from corrugated OLEDs.
  • To investigate the optimal geometry of corrugations and determine the theoretical limits of light outcoupling efficiency.

Main Methods:

  • A general rigorous scattering matrix theory was developed to solve Maxwell's equations in Fourier space.
  • The theory incorporates the Purcell effect, accounting for environment-induced modifications to the optical emission rate.
  • Computational methods were used to determine spectrally emissive power inside and outside the OLED.

Main Results:

  • Conformally corrugated OLEDs with triangular lattice symmetry achieved ηout of approximately 60-65%.
  • An enhancement factor exceeding 3 was observed for optimal corrugation pitches between 1 and 2.5 μm.
  • Waveguided and surface plasmon modes were effectively diffracted to the air cone via first-order diffraction, with plasmonic losses below 10%.

Conclusions:

  • The study demonstrates that corrugated OLED designs can significantly boost light outcoupling efficiency.
  • Optimal corrugation geometry, particularly pitch, is crucial for maximizing ηout.
  • These findings provide a pathway for developing advanced organic optoelectronic devices and solid-state lighting.