Electroluminescent properties of color/luminance tunable organic light emitting diodes and their lifetime enhancement with encapsulation

Chen Ming Chen, Ming Hua Chung, Tsung-Eong Hsien*, Bohr Ran Huang, Huai En Hsieh, Fuh Shyang Juang, Yu Sheng Tsai, Mark O. Liu, Jen Lien Lin

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

In this work, color/luminance tunable organic light emitting diodes (OLEDs) (ITO glass/naphthyl phenyl benzidine (NPB; 80 nm)/4,4′-bis(diphenylvinylenyl)-biphenyl (ADS082BE; 35 nm)/1,3-bis[2-(2,2′-bipyridine-6-yl)-1,3,4-oxadiazo-5-yl]benzene (Bpy-OXD; 20 nm)/tris-[8-hydroxy-quinoline]aluminum (Alq 3 ; 50 nm)/lithium fluoride (LiF; 3 nm)/aluminum (Al, 80 nm)) with low turn-on voltage (3 V) and high luminance (4850 cd/m 2 at 9 V) have been successfully manufactured. The experimental results reveal that their electroluminescent properties (e.g. hue, luminescent intensity, etc.) can be modulated by the manipulation for the layer thickness of NPB/ADS082BE/Bpy-OXD and the applied voltages. In addition, we have also demonstrated lab-made UV-curable silicone-acrylate encapsulating resin exhibits excellent gas barrier capability so that the half-lifetimes of OLEDs reach 98 h whereas those without encapsulation are only 9 h.

Original languageEnglish
Pages (from-to)100-105
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume153
Issue number1-3
DOIs
StatePublished - 25 Sep 2008

Keywords

  • Color tunable
  • Electroluminescent properties
  • Encapsulation
  • Lifetime
  • Luminance tunable
  • Organic light emitting diodes

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