100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films

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  • Kawamura, Yuichiro
    CREST Program, Japan Science and Technology Agency (JST)
  • Goushi, Kenichi
    Department of Photonics Materials Science, Chitose Institute of Science and Technology (CIST)
  • Brooks, Jason
    Universal Display Corporation (UDC)
  • Brown, Julie J.
    Universal Display Corporation (UDC)
  • Sasabe, Hiroyuki
    CREST Program, Japan Science and Technology Agency (JST) | Department of Photonics Materials Science, Chitose Institute of Science and Technology (CIST)
  • Adachi, Chihaya
    CREST Program, Japan Science and Technology Agency (JST) | Department of Photonics Materials Science, Chitose Institute of Science and Technology (CIST)

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Description

We demonstrate that three Ir(III) complexes used as principal dopants in organic electrophosphorescent diodes have very high photoluminescence quantum efficiency (ηPL) in a solid-state film. The green emitting complex, fac-tris(2-phenylpyridinato)iridium(III) [Ir(ppy)3], the red-emitting bis[2-(2′-benzothienyl)pyridinato-N,C3′] (acetylacetonato)iridium(III) [Btp2Ir(acac)], and the blue complex bis[(4,6-difluorophenyl)pyridinato-N,C2](picolinato)iridium(III) (FIrpic) were prepared as codeposited films of varying concentration with 4,4′-bis(N-carbazolyl)-2,2′-biphenyl, a commonly used host material. The maximum ηPL values for Ir(ppy)3, Btp2Ir(acac), and FIrpic were, respectively, 97%±2% (at 1.5 mol%), 51%±1% (at 1.4 mol%), and 78%±1% (at 15 mol%). Furthermore, we also observed that the maximum ηPL of FIrpic reached 99%±1% when doped into the high triplet energy host, m-bis(N-carbazolyl)benzene, at an optimal concentration of 1.2 mol%.

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Details 詳細情報について

  • CRID
    1050017057728388096
  • NII Article ID
    120002893745
  • NII Book ID
    AA00543431
  • HANDLE
    2324/19453
  • Text Lang
    en
  • Article Type
    journal article
  • Data Source
    • IRDB
    • CiNii Articles

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