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 language | English |
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Pages (from-to) | 151-157 |
Number of pages | 7 |
Journal | Journal of Information Display |
Volume | 13 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2012 Dec |
Externally published | Yes |
Keywords
- corrugated structure
- light extraction
- organic light-emitting diodes
- scattering layer
- sol-gel
ASJC Scopus subject areas
- Materials Science(all)
- Electrical and Electronic Engineering