Realizing both improved luminance and stability in organic light-emitting devices based on a solution-processed inter-layer composed of MoOX and Au nanoparticles mixture |
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| Affiliation: | 1. Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744, Republic of Korea;2. Graduate School of Convergence Science and Technology, Seoul National University, Seoul 151-742, Republic of Korea;3. Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul 151-744, Republic of Korea;4. Department of Chemistry, Yonsei University, Seoul 120-749, Republic of Korea;5. Energy Semiconductor Research Center, Advanced Institutes of Convergence Technology, Suwon, Gyeonggi 443-270, Republic of Korea;1. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;2. Department of Physics, Institute of Advanced Materials, and Institute of Research and Continuing Education (Shenzhen), Hong Kong Baptist University, 224 Waterloo Road, Kowloon Tong, NT, Hong Kong;1. Department of Electrical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan;2. Department of Electronic Engineering, Fortune Institute of Technology, Kaohsiung, Taiwan;3. Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan;1. School of Applied Chemical Engineering, Department of Polymer Science and Engineering, Polymeric Nanomaterials Laboratory, Kyungpook National University, Daegu 41566, Republic of Korea;2. Department of Sensor & Display Engineering, Kyungpook National University, Daegu 702-701, Republic of Korea;1. Chemistry Institute, University of Campinas (Unicamp), POB 6154, 13084-971, Campinas, SP, Brazil;2. Center for Information Technology Renato Archer—CTI, Rodovia D. Pedro I, Km 143,6, 13069-901, Campinas, SP, Brazil;3. Instituto de Ciência e Tecnologia, Federal University of São Paulo, Campus São José dos Campos, R. Talim, 330, 12231-280, São José dos Campos, SP, Brazil |
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| Abstract: | We report on the solution-processed mixture of Au nanoparticles (NPs) and MoOX as an inter-layer in organic light-emitting devices (OLEDs), leading to the enhanced light emission and good stability. An impressive enhancement in current efficiency and power efficiency is achieved up to 70% and 100%, respectively. A systematic study to the effect of the Au NPs:MoOX inter-layer on OLEDs demonstrates that the improved electrical properties is mainly ascribed to the enhanced hole injection due to the high work function of MoOX and the good conductivity of Au NPs, and the enhanced optical properties is mainly attributed to the localized surface plasmon induced by Au NPs, which makes a great contribution to the improved efficiency. Besides, Au NPs:MoOX inter-layer also behaves superior to the frequently-used polyethylene dioxythiophene:polystyrene sulfonate (PEDOT:PSS) in device stability. The decay ratio for Au NPs:MoOX based device is 60% after 80 h, while it is nearly dying out for the device with PEDOT:PSS inter-layer. |
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| Keywords: | OLED Surface plasmon Au NPs |
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