White emission from nano-structured top-emitting organic light-emitting diodes based on a blue emitting layer

Jin Hyun Woo, Jin Park Jung, Sang Hyuk Im, Ok O. Park, Doo Chin Byung

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We demonstrated that white emission can be obtained from nano-structured top-emitting organic light-emitting diodes (TEOLEDs) based on a blue emitting layer (EML). The nano-structured TEOLEDs were fabricated on nano-patterned substrates, in which both optical micro-cavity and scattering effects occur simultaneously. Due to the combination of these two effects, the electroluminescence spectra of the nano-structured device with a blue EML exhibited not only blue but also yellow colours, which corresponded to the intrinsic emission of the EML and the resonant emission of the micro-cavity effect. Consequently, it was possible to produce white emission from nano-structured TEOLEDs without employing a multimode micro-cavity. The intrinsic emission wavelength can be varied by altering the dopant used for the EML. Furthermore, the emissive characteristics turned out to be strongly dependent on the nano-pattern sizes of the nano-structured devices.

Original languageEnglish
Article number095107
JournalJournal of Physics D: Applied Physics
Volume46
Issue number9
DOIs
Publication statusPublished - 2013 Mar 6
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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