Dual pattern for enhancing light extraction efficiency of white organic light-emitting diodes

Kwan Kim, Kyoung Hoon Han, Yang Doo Kim, Daihong Huh, Yoonjay Han, Heon Lee, Jang Joo Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Nano and micro-patterns (dual patterns) were introduced on a glass substrate as an extraction layer to enhance the light extraction efficiency of white organic light-emitting diodes (WOLEDs). The dual-patterned glass was fabricated by thermal evaporation, direct printing, and reactive ion etching. The combination of nano- and micro-structures imparted highest current density and luminance to the dual-patterned WOLED without electrical degradation. Additionally, the dual-patterned WOLED exhibited higher current and power efficiencies compared to that of the nano- and micro-patterned WOLEDs, which increased by 21% and 27% at 1 mA/cm2, respectively, as compared to that of the reference.

Original languageEnglish
Pages (from-to)201-205
Number of pages5
JournalOrganic Electronics: physics, materials, applications
Volume57
DOIs
Publication statusPublished - 2018 Jun 1

Keywords

  • 3-D structure
  • External scattering layer
  • Light extraction efficiency
  • Nano and micro pattern
  • Nanoimprint lithography
  • OLED

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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