• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
Tuesday, September 9, 2025
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News Chemistry

A direct look at OLED films leads to some pretty exciton findings

Bioengineer by Bioengineer
September 6, 2025
in Chemistry
Reading Time: 2 mins read
0
IMAGE
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

Researchers from the University of Tsukuba use time-resolved photoemission electron microscopy to probe the electron dynamics of solid-state film OLEDs

Tsukuba, Japan – Organic light-emitting diodes (OLEDs) are widely used in display technology and are also being investigated for lighting applications. A comprehensive understanding of these devices is therefore important if their properties are to be harnessed to their full potential. Researchers from the University of Tsukuba have directly observed the photoexcited electron dynamics in an organic film using time-resolved photoelectron emission microscopy. Their findings are published in Advanced Optical Materials .

OLED displays are popular because they are bright, lightweight, and do not consume a lot of power. Their output is generated when an exciton–a combination of an electron and an electron hole–releases its energy. However, this release is not possible for all OLED excitons, which makes their overall efficiency low.

To address this limitation, researchers are focusing on OLEDs that exhibit thermally activated delayed fluorescence (TADF-OLEDs), which show efficiencies of up to 100%.

However, details of the electron dynamics that affect their performance are not fully understood. Attempts to learn more have used poorly defined models, meaning the findings have been difficult to interpret and apply to other systems.

The researchers focused on a single-component, solid-state film of a material known as 4CzIPN and investigated it using time-resolved photoemission electron microscopy (TR-PEEM). They compared their findings with observations made using the more commonly used time-resolved photoluminescence (TR-PL) method to try to establish details of the decay process that were previously unknown.

“Solid-state films are excellent materials for OLEDs because they make the device fabrication process simpler, reduce the degradation that is often seen, and exhibit excellent quantum efficiencies,” explains study corresponding author Professor Yoichi Yamada. “The trouble is that we still don’t fully understand what is happening to the excitons, so there’s the possibility that we could be making them even better.”

The researchers successfully detected the photoexcited electron dynamics of the TADF solid-state film using TR-PEEM. And by comparing with TR-PL results they identified long-lived electrons that they believe were formed by the dissociation of excitons.

They found that up to 4% of the excitons formed may dissociate and become trapped in the film. Very little evidence for this has been noted using other techniques.

“In addition to detecting a feature of exciton decay in TADF-OLEDs that has not been directly observed to date; we also demonstrated the potential of the TR-PEEM method,” Professor Yamada explains. “We believe our findings will make a significant contribution to the development of efficient OLED-based products.”

###

The article, “Direct Observation of Photoexcited Electron Dynamics in Organic Solids Exhibiting Thermally Activated Delayed Fluorescence via Time-resolved Photoelectron Emission Microscopy”, was published in Advanced Optical Materials at DOI: 10.1002/adom.202100619.

Media Contact
Naoko Yamashina
[email protected]

Related Journal Article

http://dx.doi.org/10.1002/adom.202100619

Tags: Atomic/Molecular/Particle PhysicsChemistry/Physics/Materials SciencesIndustrial Engineering/ChemistryMaterialsMolecular PhysicsOpticsSuperconductors/Semiconductors
Share12Tweet8Share2ShareShareShare2

Related Posts

blank

Optimizing Energy-Level Alignment in Perovskite Solar Cells: Insights from an Energy Flow Perspective

September 9, 2025
blank

Tiny Yet Mighty: Metamaterial Lenses Revolutionize Phones and Drones

September 9, 2025

UZH Device Pioneers Search for Light Dark Matter

September 8, 2025

Unlocking Insulators: How Light Pulses Set Electrons Free

September 8, 2025
Please login to join discussion

POPULAR NEWS

  • blank

    Breakthrough in Computer Hardware Advances Solves Complex Optimization Challenges

    151 shares
    Share 60 Tweet 38
  • New Drug Formulation Transforms Intravenous Treatments into Rapid Injections

    116 shares
    Share 46 Tweet 29
  • First Confirmed Human Mpox Clade Ib Case China

    56 shares
    Share 22 Tweet 14
  • A Laser-Free Alternative to LASIK: Exploring New Vision Correction Methods

    48 shares
    Share 19 Tweet 12

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Recent News

Boosting Sorafenib Efficacy via Dipeptidyl Peptidase 9 Inhibition

Preduodenal Portal Vein: Diverse Cases and Surgery Insights

How Evolution Sheds Light on Autism Rates in Humans

  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

Bioengineer.org © Copyright 2023 All Rights Reserved.