Highly efficient solution-processed red organic light-emitting diodes with long-side-chained triplet emitter

Yu Chiang Chao, Sheng Yang Huang, Chun Yu Chen, Yu Fan Chang, Hsin-Fei Meng*, Feng Wen Yen, I. Feng Lin, Hsiao-Wen Zan, Sheng Fu Horng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Newly synthesized red Ir complexes tris[2-(4-n-hexyl-phenyl)quinoline] iridium(III) and tris[(4-n-hexylphenyl)isoquinoline)]iridium(III) with long alkyl side chains are utilized to demonstrate the high efficiency multi-layer solution-processed red organic light-emitting diodes. Solubilities of these triplet emitters are high which enable them to be uniformly dispersed in the polymer host. Blade coating method is utilized to prepare organic multi-layers without mutual dissolution between different layers. 17 cd/A current efficiency, 10 lm/W power efficiency, and 8.8% external quantum efficiency can be achieved for the device with CsF/Al cathode. 10,000 cd/m2 is reached at 10 V. Similar quantum efficiency is also achieved with an electron-transport layer and LiF/Al cathode.

Original languageEnglish
Pages (from-to)148-152
Number of pages5
JournalSynthetic Metals
Volume161
Issue number1-2
DOIs
StatePublished - 1 Jan 2011

Keywords

  • Ir complexes
  • Polymer light-emitting diodes

Fingerprint Dive into the research topics of 'Highly efficient solution-processed red organic light-emitting diodes with long-side-chained triplet emitter'. Together they form a unique fingerprint.

Cite this