Organic Light-Emitting Diodes Using Multifunctional Phosphorescent Dendrimers with Iridium-Complex Core and Charge-Transporting Dendrons
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概要
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We report a novel class of light-emitting materials for use in organic light-emitting diodes (OLEDs): multifunctional phosphorescent dendrimers that have a phosphorescent core and dendrons based on charge-transporting building blocks. We synthesized first-generation and second-generation dendrimers consisting of a fac-tris(2-phenylpyridine)iridium [Ir(ppy)3] core and hole-transporting phenylcarbazole-based dendrons. Smooth amorphous films of these dendrimers were formed by spin-coating them from solutions. The OLEDs using the dendrimer exhibited bright green or yellowish-green emission from the Ir(ppy)3 core. The OLEDs using the film containing a mixture of the dendrimer and an electron-transporting material exhibited higher efficiency than those using the neat dendrimer film. The external quantum efficiency of OLEDs using the film containing a mixture of the first-generation dendrimer and an electron-transporting material was as high as 7.6%.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-06-15
著者
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Tokito Shizuo
Nhk Sci. And Technical Res. Laboratories
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TSUZUKI Toshimitsu
NHK Science and Technical Research Laboratories
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Suzuki Toshiyasu
Institute For Molecular Science
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Tokito Shizuo
Nhk Tokyo Jpn
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Tsuzuki Toshimitsu
Nhk Tokyo Jpn
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Shirasawa Nobuhiko
Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444-8787, Japan
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Shirasawa Nobuhiko
Institute For Molecular Science
関連論文
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