Air void optical scattering structure for high-brightness organic light emitting diodes

Young Hoon Sung, Kyung Hoon Han, Yang Doo Kim, Yoonjay Han, Jang Joo Kim, Heon Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In order to increase the outcoupling efficiency of organic light emitting diodes (OLEDs), a hexagonal array of air void optical scattering structures was formed on a glass substrate. The air void structure was fabricated by first depositing a monolayer of polystyrene (PS) spheres having a diameter of 820. nm on the substrate. A layer of hydrogen silsesquioxane (HSQ) was then coated on the resulting monolayer and finally, annealing was carried out to burn out the PS spheres and to cure the HSQ layer. The air void optical scattering structure on the glass substrate interacted with the generated photons and suppressed the total internal reflection of light at the surface of the glass. As a result, the OLED fabricated on this glass exhibited a 10% increase in the optical output.

Original languageEnglish
JournalCeramics International
DOIs
Publication statusAccepted/In press - 2017

Keywords

  • Air void structure
  • OLED
  • Outcoupling efficiency
  • Polystyrene sphere
  • SiO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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