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Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
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Flexible Ink-Jet Printed Polymer Light-Emitting Diodes using a Self-Hosted Non-Conjugated TADF Polymer.

Cameron M Cole1, Susanna V Kunz1, Thomas Baumann2

  • 1Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD, 4000, Australia.

Macromolecular Rapid Communications
|April 14, 2023
PubMed
Summary

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Highly efficient organic light-emitting diodes (OLEDs) can be fabricated using solution-processed, ink-jet printed Thermally Activated Delayed Fluorescent (TADF) emitters. This self-hosted TADF polymer simplifies OLED manufacturing for scalable applications.

Area of Science:

  • Materials Science
  • Organic Electronics
  • Photophysics

Background:

  • Thermally activated delayed fluorescent (TADF) emitters are crucial for developing highly efficient organic light-emitting diodes (OLEDs).
  • Scalable and cost-effective fabrication methods are essential for the widespread adoption of OLED technology.
  • Current methods often require complex multi-step processes and specialized deposition techniques.

Purpose of the Study:

  • To introduce a novel, fully solution-processed OLED device utilizing an ink-jet printed TADF emissive layer.
  • To demonstrate a self-hosted TADF polymer that eliminates the need for additional host materials.
  • To explore the potential of this material in flexible OLED applications.

Main Methods:

  • Ink-jet printing of a TADF polymer with integrated electron and hole conductive side chains.
Keywords:
flexible electronicsink-jet printingorganic light-emitting diodesself-hosted polymerssolution-processabilitythermally activated delayed fluorescence polymers

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  • Fabrication of a simple OLED device with the solution-processed TADF layer.
  • Testing of the device performance, including emission spectra and luminance.
  • Demonstration in a flexible OLED configuration.

    • Main Results:

    • The fabricated OLED achieved a peak emission at 502 nm.
    • A maximum luminance of approximately 9600 cd m-2 was recorded for the non-flexible device.
    • The flexible OLED demonstrated a maximum luminance exceeding 2000 cd m-2.
    • The self-hosted TADF polymer simplified fabrication by obviating the need for host materials.

    Conclusions:

    • The developed self-hosted TADF polymer is suitable for ink-jet printing, enabling solution-processed OLED fabrication.
    • This approach offers a pathway towards more scalable and cost-effective manufacturing of OLEDs, including flexible devices.
    • The material's properties show significant promise for next-generation display and lighting technologies.