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Ambient fabrication of flexible and large-area organic light-emitting devices using slot-die coating

Author

Listed:
  • Andreas Sandström

    (The Organic Photonics and Electronics Group, Umeå University)

  • Henrik F. Dam

    (Technical University of Denmark)

  • Frederik C. Krebs

    (Technical University of Denmark)

  • Ludvig Edman

    (The Organic Photonics and Electronics Group, Umeå University)

Abstract

The grand vision of manufacturing large-area emissive devices with low-cost roll-to-roll coating methods, akin to how newspapers are produced, appeared with the emergence of the organic light-emitting diode about 20 years ago. Today, small organic light-emitting diode displays are commercially available in smartphones, but the promise of a continuous ambient fabrication has unfortunately not materialized yet, as organic light-emitting diodes invariably depend on the use of one or more time- and energy-consuming process steps under vacuum. Here we report an all-solution-based fabrication of an alternative emissive device, a light-emitting electrochemical cell, using a slot-die roll-coating apparatus. The fabricated flexible sheets exhibit bidirectional and uniform light emission, and feature a fault-tolerant >1-μm-thick active material that is doped in situ during operation. It is notable that the initial preparation of inks, the subsequent coating of the constituent layers and the final device operation all could be executed under ambient air.

Suggested Citation

  • Andreas Sandström & Henrik F. Dam & Frederik C. Krebs & Ludvig Edman, 2012. "Ambient fabrication of flexible and large-area organic light-emitting devices using slot-die coating," Nature Communications, Nature, vol. 3(1), pages 1-5, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms2002
    DOI: 10.1038/ncomms2002
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