Solution-processible corrugated structure and scattering layer for enhanced light extraction from organic light-emitting diodes

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

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A simple method of fabricating out-coupling structures was demonstrated via solution-processing to enhance light extraction from organic light-emitting diodes (OLEDs). Scattering layers were easily obtained by spin-coating an SiO2 sol solution that contained TiO2 particles. By introducing the scattering layer and the solution-processible corrugated structure as internal and external extraction layers, the OLEDs showed increased external quantum efficiency without a change in the electroluminescence spectrum compared to conventional devices. Using these solution-processible out-coupling structures, nearly all-solution-processed OLEDs with enhanced light extraction could be fabricated. The light extraction enhancement is attributed to the suppression by the out-coupling structures of the light-trapping that arose at the interface of the glass substrate and the air.

Original languageEnglish (US)
Pages (from-to)151-157
Number of pages7
JournalJournal of Information Display
Volume13
Issue number4
DOIs
StatePublished - Dec 2012

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program of the National Research Foundation of Korea (NRF), which is funded by the Ministry of Education, Science, and Technology (CAFDC-20120000821). This work was supported by the collaborative R&D program with technology advanced country “Development of materials and stacked device structure for next-generation solar cells, 2010-advanced-B-105” by the Ministry of Knowledge and Economy.

Keywords

  • corrugated structure
  • light extraction
  • organic light-emitting diodes
  • scattering layer
  • sol-gel

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