3,6-Diarylcarbazole Derivatives as a Host Material in Organic Electrophosphorescent Diodes
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概要
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We synthesized 3,6-diarylcarbazole (CBZ) derivatives and investigated their thin-film optical (i.e., absorption, fluorescence and phosphorescence) properties and electroluminescence characteristics. We fabricated phosphorescent organic light-emitting diodes (OLEDs) employing CBZ derivatives as the host and fac-tris(2-phenypyridine)iridium [Ir(ppy)3] as the guest at a doping concentration of 6 wt %. These devices exhibited maximum external quantum efficiencies ($\eta_{\text{ext}}$) in the range 1 to 11%, depending on the host. In particular, the OLED with CBZ7 as the host exhibited the highest $\eta_{\text{ext}}$ of 11.2% and a maximum power conversion efficiency ($\eta_{\text{energy}}$) of 25 lm/W.
- 2010-08-25
著者
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Sasabe Hiroyuki
Department Of Drug Metabolism Tokushima Research Institute Otsuka Pharmaceutical Co. Ltd.
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Adachi Chihaya
Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan
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Adachi Chihaya
Department of Photonics Material Science, Chitose Institute of Science and Technology, 758-65 Bibi, Chitose, Hokkaido 066-8655, Japan
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Muneuchi Kenji
Department of Photonics Material Science, Chitose Institute of Science and Technology, 758-65 Bibi, Chitose, Hokkaido 066-8655, Japan
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Sasaki Masaomi
R&D Center, Ricoh Co., Ltd., 16-6 Shinei, Tsuzuki, Yokohama 224-0035, Japan
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Sasaki Masaomi
R&D Center, Ricoh Co., Ltd., 16-6 Shinei, Tsuzuki, Yokohama 224-0035, Japan
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