High triplet energy Al complex as a host material for blue phosphorescent organic light-emitting diodes |
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| Affiliation: | 1. Institute of Super-microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics, Central South University, Changsha, Hunan 410083, China;2. Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, Hunan 410083, China;3. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;4. Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA;1. Jiangsu Engineering Centre for Flat-Panel Displays & Solid-state Lighting, College of Materials Science & Engineering, Nanjing University of Posts & Telecommunications, Nanjing 210046, China;2. Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts& Telecommunications, Nanjing 210046, China;1. Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421002, China;2. Department of Applied Physics, Hunan University and Key Lab for Micro-Nano Physics and Technology of Hunan Province, Changsha 410082, China;1. Atta-ur-Rahman Institute for Natural Product Discovery, Universiti Teknologi MARA (UiTM), Puncak Alam Campus, 42300 Bandar Puncak Alam, Selangor D.E., Malaysia;2. Faculty of Applied Science, UiTM Shah Alam, 40450 Shah Alam, Selangor D.E., Malaysia;3. Dr. Panjwani Center for Molecular Medicine and Drug Research, International Centre for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan;4. H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan |
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| Abstract: | An Al complex, tris((2-(pyrazol-1-yl)pyridin-3-yl)oxy)aluminum (Al(pypy)3), was synthesized as a high triplet energy host material for blue phosphorescent organic light-emitting diodes. A high triplet energy ligand, 2-(1H-pyrazol-1-yl)pyridin-3-ol, was coordinated to the Al to develop the high triplet energy host material derived from Al. The Al(pypy)3 host showed a high triplet energy of 2.86 eV for efficient energy transfer to blue triplet emitter. A maximum quantum efficiency of 20.5% was achieved in blue device using the Al(pypy)3 host material. |
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| Keywords: | Al complex High quantum efficiency High triplet energy Blue device |
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