Synthesis of a high-efficiency red phosphorescent emitter for organic light-emitting diodes

Cheng Hsien Yang, Chia Cheng Tai, I. Wen Sun

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134 Citations (Scopus)


Four novel red phosphorescent emitter compounds bis(1-phenylisoquinolinato-N, C2′)iridium(acetylacetonate), (piq)2Ir(acac), bis(1-(1′-naphthyl)isoquinolinato-N, C2′)iridium(acetylacetonate), (1-niq)2Ir(acac), bis(1-(2′-naphthyl)isoquinolinato-N, C2′)iridium(acetylacetonate), (2-niq)2Ir(acac) and bis(1-phenyl-5-methylisoquinolinato-N, C2′)iridium(acetylacetonate), (m-piq)2Ir(acac), have been synthesized and fully characterized. Electroluminescent devices with a configuration of ITO/NPB/CBP:dopant/BCP/AlQ3/Al were fabricated. All devices emitted in the red region with an emission ranging from 624 to 680 nm. (m-piq)2Ir(acac) shows a maximum brightness of 17 164 cd m-2 at a current density of J= 300 mA cm-2 and the best luminance efficiency of 8.91 cd A-1 at a current density of J= 20 mA cm-2. (1-niq)2Ir(acac) exhibits pure-red emission with 1931 CIE (Commission International de L’Eclairage) chromaticity coordinates x= 0.701, y= 0.273.

Original languageEnglish
Pages (from-to)947-950
Number of pages4
JournalJournal of Materials Chemistry
Publication statusPublished - 2004 Jan 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry


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