Two-dimensional TiO2 inverse opal with a closed top surface structure for enhanced light extraction from polymer light-emitting diodes

Woo Jin Hyun, Hang Ken Lee, Sang Soon Oh, Ortwin Hess, Choon Gi Choi, Sang Hyuk Im, O. Ok Park

Research output: Contribution to journalArticle

39 Citations (Scopus)


Two-dimensional TiO2 inverse opal structures with a thin, flat-top surface are fabricated and inserted between the glass substrate and the anode electrode of solution-processed polymer light-emitting diodes. It is demonstrated that the proposed inverse opal structure acts as a 2D photonic crystal, achieving a significant enhancement in the light extraction from the electroluminescent devices.

Original languageEnglish
Pages (from-to)1846-1850
Number of pages5
JournalAdvanced Materials
Issue number16
Publication statusPublished - 2011 Apr 26
Externally publishedYes



  • colloidal crystals
  • inverse opal
  • light extraction
  • photonic crystals
  • polymer LEDs

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this