Highly directional emission and beam steering from organic light-emitting diodes with a substrate diffractive optical element

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Abstract

Highly directional emission from an organic light-emitting diode (OLED) is demonstrated by out-coupling the substrate mode from a Eu-based OLED using a diffractive optical element embedded in the substrate. This approach gives emission that is confined in a single narrow cone with FWHM divergence of 15° or less, which is very different from the normal Lambertian emission of OLEDs.
Original languageEnglish
JournalAdvanced Optical Materials
VolumeEarlyView
Early online date4 Feb 2014
DOIs
Publication statusPublished - 2014

Keywords

  • OLEDs
  • Photonic crystals
  • Nanoimprint lithography
  • Narrow band emitters
  • Europium complexes

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