100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films
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- 河村, 祐一郎
- 独立行政法人 科学技術振興機構CRESTプログラム
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- 合志, 憲一
- 千歳科学技術大学光サイエンス部門
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- Brooks, Jason
- Universal Display Corporation (UDC)
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- Brown, Julie J.
- Universal Display Corporation (UDC)
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- 雀部, 博之
- 独立行政法人 科学技術振興機構CRESTプログラム | 千歳科学技術大学光サイエンス部門
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- 安達, 千波矢
- 独立行政法人 科学技術振興機構CRESTプログラム | 千歳科学技術大学光サイエンス部門
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説明
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%.
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 86 (7), 2005-05-05
American Institute of Physics
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詳細情報 詳細情報について
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- CRID
- 1050017057728388096
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- NII論文ID
- 120002893745
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- NII書誌ID
- AA00543431
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- HANDLE
- 2324/19453
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- IRDB
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