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Multi-colour organic light-emitting displays by solution processing

Author

Listed:
  • C. David Müller

    (Universität München
    Universität zu Köln)

  • Aurélie Falcou

    (Industriepark Hoechst, G865)

  • Nina Reckefuss

    (Universität München
    Universität zu Köln)

  • Markus Rojahn

    (Technische Universität München)

  • Valèrie Wiederhirn

    (Technische Universität München)

  • Paula Rudati

    (Universität München
    Universität zu Köln)

  • Holger Frohne

    (Universität München
    Universität zu Köln)

  • Oskar Nuyken

    (Technische Universität München)

  • Heinrich Becker

    (Industriepark Hoechst, G865)

  • Klaus Meerholz

    (Universität München
    Universität zu Köln)

Abstract

Organic light-emitting diodes (OLEDs) show promise for applications as high-quality self-emissive displays for portable devices such as cellular phones and personal organizers1,2,3,4. Although monochrome operation is sufficient for some applications, the extension to multi-colour devices—such as RGB (red, green, blue) matrix displays—could greatly enhance their technological impact. Multi-colour OLEDs have been successfully fabricated by vacuum deposition of small electroluminescent molecules, but solution processing of larger molecules (electroluminescent polymers) would result in a cheaper and simpler manufacturing process. However, it has proved difficult to combine the solution processing approach with the high-resolution patterning techniques required to produce a pixelated display. Recent attempts have focused on the modification of standard printing techniques, such as screen printing5,6,7 and ink jetting8, but those still have technical drawbacks. Here we report a class of electroluminescent polymers that can be patterned in a way similar to standard photoresist materials—soluble polymers with oxetane sidegroups that can be crosslinked photochemically to produce insoluble polymer networks in desired areas. The resolution of the process is sufficient to fabricate pixelated matrix displays. Consecutive deposition of polymers that are luminescent in each of the three RGB colours yielded a device with efficiencies comparable to state-of-the-art OLEDs and even slightly reduced onset voltages.

Suggested Citation

  • C. David Müller & Aurélie Falcou & Nina Reckefuss & Markus Rojahn & Valèrie Wiederhirn & Paula Rudati & Holger Frohne & Oskar Nuyken & Heinrich Becker & Klaus Meerholz, 2003. "Multi-colour organic light-emitting displays by solution processing," Nature, Nature, vol. 421(6925), pages 829-833, February.
  • Handle: RePEc:nat:nature:v:421:y:2003:i:6925:d:10.1038_nature01390
    DOI: 10.1038/nature01390
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    Cited by:

    1. Hyukmin Kweon & Keun-Yeong Choi & Han Wool Park & Ryungyu Lee & Ukjin Jeong & Min Jung Kim & Hyunmin Hong & Borina Ha & Sein Lee & Jang-Yeon Kwon & Kwun-Bum Chung & Moon Sung Kang & Hojin Lee & Do Hwa, 2022. "Silicone engineered anisotropic lithography for ultrahigh-density OLEDs," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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