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Issue 6, 2004
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Synthesis of a high-efficiency red phosphorescent emitter for organic light-emitting diodes

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Abstract

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.

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

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Publication details

The article was received on 31 Oct 2003, accepted on 24 Dec 2003 and first published on 11 Feb 2004


Article type: Paper
DOI: 10.1039/B313843G
Citation: J. Mater. Chem., 2004,14, 947-950
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    Synthesis of a high-efficiency red phosphorescent emitter for organic light-emitting diodes

    C. Yang, C. Tai and I. Sun, J. Mater. Chem., 2004, 14, 947
    DOI: 10.1039/B313843G

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