Realizing improved performance of down-conversion white organic light-emitting diodes by localized surface plasmon resonance effect of Ag nanoparticles |
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| Affiliation: | 1. School of Physics, Northwestern University, Xi''an, 710069, China;2. Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;3. College of Science, Shaanxi University of Science and Technology, Xi''an, 710021, China;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. Photovoltaic Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, South Korea;2. Department Electrical and Computer Engineering, Inter-university Semiconductor Research Center, Seoul National University, 1-Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea;3. School of Mechanical and Aerospace Engineering, Seoul National University, 1-Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea;4. Global Frontier Center for Multiscale Energy Systems, Seoul National University, Seoul 08826, South Korea;1. School of Mechatronic Engineering and Automation, Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai, 200072, PR China;2. Higher Education Key Laboratory of New Microstructure Functional Materials in Shanxi Province, Shanxi Datong University, Datong, 037009, China;3. State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, 610054, China;4. Light, Nanomaterials, Nanotechnologies (L2n, former « LNIO »), Charles Delaunay Institute, CNRS, Université de Technologie de Troyes, Troyes, France |
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| Abstract: | Down-conversion structure white organic light-emitting diodes (WOLEDs), in which white light is generated by a blue emission organic light-emitting diodes (OLEDs) in combination with a color conversion layer (CCL) outside the substrate, has attracted extensive interest due to its significant advantages in low cost and stabilized white-light emissions. However, low color-conversion efficiency of CCL is still a bottleneck for the performance improvement of down-conversion WOLEDs. Here, we demonstrate an approach to enhance the color-conversion efficiency of CCL-WOLEDs by localized surface plasmon resonance (LSPR) effect. In this approach, a blend of Ag nanoparticles and polyvinyl alcohol (PVA) is solution-deposited between the blue organic light emitting diodes and color-conversion layer. Based on the LSPR effect of this modified structure, the color conversion efficiency has improved 32%, from 45.4% to 60%, resulting a 14.4% enhancement of the current efficiency, from 9.73 cd/A to 11.14 cd/A. Our work provides a simple and low-cost way to enhance the performance of down-conversion WOLEDs, which highlights its potential in illumination applications. |
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| Keywords: | White organic light-emitting diodes Down-conversion Localized surface plasmon resonance Ag nanoparticles |
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