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

The Electrical Double Layer01:30

The Electrical Double Layer

In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...

You might also read

Related Articles

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

Sort by
Same author

Conjugated Oligoelectrolytes as Optical Probes.

Accounts of chemical research·2026
Same author

Spontaneously N-Doped Conjugated Polyelectrolyte Coatings Accelerate Electron Uptake in Shewanella Oneidensis.

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

Theoretical and Experimental Assessment of the Absorption and Dual Emission of Benzobisthiadiazole Conjugated Oligoelectrolyte Probes.

The journal of physical chemistry letters·2025
Same author

Effects of Halogen Substitution on the Antibiotic Characteristics of Conjugated Oligoelectrolytes.

Journal of medicinal chemistry·2025
Same author

Nanoscale Curvature-Facilitated Membrane Intercalation of Conjugated Oligoelectrolytes Revealed by Nanobar-Supported Lipid Bilayers.

ACS nano·2025
Same author

Aqueous asymmetric pseudocapacitor featuring high areal energy and power using conjugated polyelectrolytes and Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene.

Nature communications·2025

Related Experiment Video

Updated: Jun 23, 2026

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

Molecular design, device function and surface potential of zwitterionic electron injection layers.

Huaping Li1, Yunhua Xu, Corey V Hoven

  • 1Department of Materials, Center for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, USA.

Journal of the American Chemical Society
|May 23, 2009
PubMed
Summary

New zwitterionic molecules improve polymer light-emitting diode (PLED) efficiencies by enhancing electron injection. The alkyl chain length of these compounds, C(n)-BIm(4), significantly impacts performance, with longer chains like C(16)-BIm(4) showing the best results.

More Related Videos

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer
10:11

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer

Published on: April 19, 2021

Inkjet-printed Polyvinyl Alcohol Multilayers
05:11

Inkjet-printed Polyvinyl Alcohol Multilayers

Published on: May 11, 2017

Related Experiment Videos

Last Updated: Jun 23, 2026

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer
10:11

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer

Published on: April 19, 2021

Inkjet-printed Polyvinyl Alcohol Multilayers
05:11

Inkjet-printed Polyvinyl Alcohol Multilayers

Published on: May 11, 2017

Area of Science:

  • Materials Science
  • Organic Electronics
  • Electrochemistry

Background:

  • Polymer light-emitting diodes (PLEDs) are crucial for display technologies.
  • Efficient electron injection into the emissive layer is vital for PLED performance.
  • Zwitterionic molecules offer unique electronic properties for interface engineering.

Purpose of the Study:

  • To synthesize and characterize novel zwitterionic molecules, C(n)-BIm(4).
  • To investigate the impact of these molecules on PLED electroluminescence efficiency.
  • To elucidate the mechanism by which zwitterions improve electron injection.

Main Methods:

  • Synthesis of zwitterionic compounds via nucleophilic substitution.
  • Structural analysis using single crystal X-ray diffraction.
  • PLED fabrication and performance testing with varying C(n)-BIm(4) compounds.
  • Surface analysis using Atomic Force Microscopy (AFM).
  • Electrochemical measurements including open circuit voltage and surface potential.

Main Results:

  • Zwitterionic nature of C(n)-BIm(4) confirmed, with molecular dipole moments calculated.
  • Significant improvement in PLED electroluminescence efficiency observed with C(n)-BIm(4) insertion.
  • Electron injection barrier reduction is the primary mechanism for efficiency enhancement.
  • Performance correlates with alkyl chain length, C(16)-BIm(4) shows optimal results.
  • Zwitterion insertion forms a dipole layer at the metal/organic interface, shifting the vacuum level.

Conclusions:

  • Zwitterionic molecules, particularly C(16)-BIm(4), effectively enhance PLED performance.
  • The improvement is attributed to optimized electron injection facilitated by interfacial dipole formation.
  • These findings highlight the potential of zwitterions for advanced organic electronic devices.