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

Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

2.3K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
2.3K
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction01:16

[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

13.4K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
13.4K
Photoluminescence: Applications01:14

Photoluminescence: Applications

1.2K
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
1.2K
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.8K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.8K

You might also read

Related Articles

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

Sort by
Same author

Resonant Cavity-Enhanced Intermolecular Charge-Transfer Absorption for Near-Infrared Photon Upconversion and Single-Detector Imaging.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Revelation of Core-Surface p-n Junction Structures for PbS Quantum Dots.

The journal of physical chemistry letters·2026
Same author

Synergistic roles of aquaporin 5 and intra- and extracellular carbonic anhydrases in promoting CO<sub>2</sub> diffusion across the Xenopus oocyte plasma membrane.

The Journal of physiology·2025
Same author

Unraveling the Influence of Surface Contaminants and Cleaning Protocols on Charge States of SiO<sub>2</sub> Dielectrics and the Performance of Organic Field-Effect Transistors.

Langmuir : the ACS journal of surfaces and colloids·2025
Same author

Pure Mg Cathode for Highly Efficient Single-Layer Organic Light-Emitting Diodes.

ACS applied materials & interfaces·2024
Same author

Deep Blue CsPbBr<sub>3</sub> Quantum Wires with Tailored Shapes.

The journal of physical chemistry letters·2024

Related Experiment Video

Updated: Mar 7, 2026

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

9.5K

Stacking multiple connecting functional materials in tandem organic light-emitting diodes.

Tao Zhang1,2, Deng-Ke Wang1,2, Nan Jiang1,2

  • 1Department of Physics, Yunnan University, Kunming, Yunnan 650091, People's Republic of China.

Scientific Reports
|February 23, 2017
PubMed
Summary

Researchers developed a new connecting material stack for tandem organic light-emitting diodes (OLEDs). This advancement resolves current spreading issues, enabling highly efficient OLEDs with reduced efficiency roll-off.

More Related Videos

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

655
Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
14:37

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

10.0K

Related Experiment Videos

Last Updated: Mar 7, 2026

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

9.5K
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

655
Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
14:37

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

10.0K

Area of Science:

  • Materials Science
  • Organic Electronics
  • Device Physics

Background:

  • Tandem devices are crucial for high-performance organic light-emitting diodes (OLEDs) and organic photovoltaic cells.
  • The connecting material stack is a key element influencing electric field distribution, charge generation, and injection in tandem devices.
  • A simple Liq/Al/MoO3 stack in tandem OLEDs suffers from current lateral spreading, limiting device performance.

Purpose of the Study:

  • To address the limitations of existing connecting material stacks in tandem OLEDs.
  • To develop a novel connecting material stack that mitigates current lateral spreading and improves device efficiency.
  • To enable the fabrication of efficient tandem OLEDs with minimized efficiency roll-off.

Main Methods:

  • Investigated the impact of aluminum (Al) thickness in a Liq/Al/MoO3 connecting stack on current spreading in tandem OLEDs.
  • Introduced a new connecting material stack incorporating a C60 fullerene buffer layer.
  • Fabricated and characterized tandem OLED devices utilizing the novel connecting stack.

Main Results:

  • Identified significant current lateral spreading and out-of-pixel light emission when Al thickness exceeded 2 nm in the simple stack.
  • The new C60 fullerene-containing stack effectively resolved the current spreading issue.
  • Achieved a high current efficiency of 155.6 cd/A and reduced efficiency roll-off in the fabricated tandem OLEDs.

Conclusions:

  • The C60 fullerene buffer layer is critical for optimizing the aluminum metal layer in the connecting stack.
  • The developed connecting material stack enables the fabrication of efficient and stable tandem OLEDs.
  • This advancement paves the way for higher performance in tandem organic electronic devices.