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Phosphorescent organic light emitting diodes with a cross-linkable hole transporting material
Affiliation:1. Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611-6400, United States;2. Plextronics Inc., Pittsburgh, PA 15238, United States;1. Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, PR China;2. Department of Chemistry, Renmin University of China, Beijing 100872, PR China;1. Department of Chemical Engineering, University of Rochester, Rochester, NY 14627, USA;2. Department of Chemistry, University of Rochester, Rochester, NY 14627, USA;1. Department of Chemistry, Research Institute for Natural Sciences, Korea University, 5 Anam-dong, Sungbuk-gu, Seoul 136-701, Republic of Korea;2. Future Convergence Research Division, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, Republic of Korea;3. Display and Nanosystem Laboratory, College of Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 136-713, Republic of Korea;1. Institute of Chemistry, University of Silesia, 9 Szkolna Str., 40-006 Katowice, Poland;2. Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, LT50254 Kaunas, Lithuania;3. Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 M. Curie-Sklodowska Str., 41-819 Zabrze, Poland;1. Department of Chemistry Education, Graduate Department of Chemical Materials, BK 21 PLUSTeam for Advanced Chemical Materials, Institute for Plastic Information and Energy Materials, Pusan National University, Busan 609-735, Republic of Korea;2. Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul 151-744, Republic of Korea
Abstract:A cross-linkable hole transporting material PLEXCORE® HTL was incorporated in phosphorescent organic light emitting diodes. This hole transporting material is based on an arylamine derivate. The device performance in terms of efficiency and lifetime was compared to the same devices with a thermally evaporated 4,4′-bisN-(1-naphthyl)-N-phenylamino]biphenyl (NPB)-based hole transporting layer. The resulting devices with the cross-linkable HTL gave higher efficiency, smaller roll-off and longer lifetime compared with devices with the NPB-based devices. This new hole transporting material paves the road toward solution processed multilayer light emitting devices.
Keywords:Cross-linkable  Hole transporting material  Plexcore  Efficiency  Lifetime  OLEDs
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