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Development of Efficient OLEDs from Solution Deposition
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High-Resolution Organic Light-Emitting Diodes Patterned via Contact Printing.

Jinhai Li1, Lisong Xu1, Ching W Tang1

  • 1Department of Chemical Engineering, University of Rochester , Rochester, New York 14627, United States.

ACS Applied Materials & Interfaces
|June 16, 2016
PubMed
Summary

We developed a new contact printing method using polyurethane-acrylate (PUA) stamps for organic light-emitting diode (OLED) fabrication. This technique offers high resolution and efficiency comparable to traditional methods, enabling advanced OLED display manufacturing.

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Nanotechnology

Background:

  • Traditional methods for fabricating organic light-emitting diodes (OLEDs) often involve complex vacuum deposition processes.
  • Achieving high resolution and uniformity in patterning electroluminescent layers is crucial for advanced display technologies.
  • Developing cost-effective and scalable manufacturing techniques for OLEDs is an ongoing area of research.

Purpose of the Study:

  • To introduce and evaluate a novel contact printing technique for patterning electroluminescent layers in OLEDs.
  • To demonstrate the capability of polyurethane-acrylate (PUA) polymers as effective printing stamps.
  • To assess the performance and resolution of OLED devices fabricated using this printing method.

Main Methods:

Keywords:
contact printinghigh-resolution printingorganic light emitting diodespolyurethane acrylatethin-film patterning

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  • Utilizing polyurethane-acrylate (PUA) polymers as stamps for contact printing.
  • Patterning electroluminescent layers for organic light-emitting diodes (OLEDs).
  • Investigating the effect of postprinting thermal annealing on device performance.
  • Comparing the external quantum efficiency (EQE) of printed OLEDs with vacuum-deposited devices.

    • Main Results:

    • Successfully printed electroluminescent thin films with high uniformity and resolution.
    • Demonstrated improved device performance through postprinting thermal annealing.
    • Achieved external quantum efficiency (EQE) comparable to vacuum-deposited OLEDs.
    • Showcased potential for manufacturing OLED displays with resolution up to the diffraction limit.

    Conclusions:

    • Polyurethane-acrylate (PUA) based contact printing is a viable alternative to traditional shadow mask deposition for OLED manufacturing.
    • This technique enables the fabrication of high-performance OLEDs with excellent resolution.
    • The PUA contact printing method holds promise for the future of advanced OLED display production.