Department of Energy Science and Engineering
MNEDL(Multifunctional Nanomaterials & Energy Devices Lab)
1. Journal Articles
Enhanced optical properties of nanopillar light-emitting diodes by coupling localized surface plasmon of Ag/SiO2 nanoparticles
- Title
- Enhanced optical properties of nanopillar light-emitting diodes by coupling localized surface plasmon of Ag/SiO2 nanoparticles
- Author(s)
- Yun, Jin-Hyeon ; Cho, Han-Su ; Bae, Kang-Bin ; Sudhakar, Selvakumar ; Kang, Yeon Su ; Lee, Jong-Soo ; Polyakov, Alexander Y. ; Lee, In-Hwan
- Issued Date
- 2015-09
- Citation
- Applied Physics Express, v.8, no.9
- Type
- Article
- Keywords
- Active Regions ; Electroluminescence ; Electroluminescence Intensity ; Energy Couplings ; Fluorescence ; InGaN/GaN Quantum Well ; Light ; Light emitting Diodes ; Localized Surface Plasmon ; NANOPARTICLES ; Nanostructures ; Optical Enhancements ; Optical Properties ; PHOTOLUMINESCENCE ; Photoluminescence Decay ; Plasmons ; Semiconductor Quantum Wells ; Silver ; Spontaneous emission Rates ; SUBWAVELENGTH OPTICS ; Surface Plasmon Resonance
- ISSN
- 1882-0778
- Abstract
-
We fabricated nanopillar light-emitting diodes (LEDs) embedded with Ag/SiO
2 nanoparticles, and investigated the energy coupling processes between the localized surface plasmons of nanoparticles and the active quantum well regions of nanopillar LEDs. These nanoparticle-embedded nanopillar LEDs showed considerable increases in photoluminescence and electroluminescence intensities, compared with reference nanopillar LEDs. The observed optical enhancement was explained by the increased spontaneous emission rate caused by energy coupling from excitons in the InGaN/GaN quantum well active region of the LEDs to the localized surface plasmon modes of the Ag/SiO2 nanoparticles. A strongly enhanced characteristic photoluminescence decay also confirmed such an explanation. © 2015 The Japan Society of Applied Physics.
- Publisher
- Institute of Physics Publishing
- Related Researcher
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Lee, Jong-Soo
- Research Interests Design of new type of multifunctional nanoparticles for energy-related devices; 다기능성 나노재료; 무기물 태양전지; 열전소자
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