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Enhancement in Light Emission Efficiency of Si Nanocrystal Light-Emitting Diodes by a Surface Plasmon Coupling
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- Authors
- Chul Huh, Chel-Jong Choi, Wanjoong Kim, Bong Kyu Kim, Byoung-Jun Park, Eun-Hye Jang, Sang-Hyeob Kim, Gun Yong Sung
- Issue Date
- 2012-05
- Citation
- Applied Physics Letters, v.100, no.18, pp.1-5
- ISSN
- 0003-6951
- Publisher
- American Institute of Physics (AIP),
- Language
- English
- Type
- Journal Article
- Abstract
- We report an enhancement in light emission efficiency form Si nanocrystal (NC) light-emitting diodes (LEDs) via surface plasmons (SPs) by employing Au nanoparticles (NPs). Photoluminescence intensity of Si NCs with Au NPs was enhanced by 2 factors of magnitude due to the strong coupling of Si NCs and SP resonance modes of Au NPs. The electrical characteristics of Si NC LED were significantly improved, which was attributed to an increase in an electron injection into the Si NCs due to the formation of inhomogeneous Schottky barrier at the SiC-indium tin oxide interface. Moreover, light output power from the Si NC LED was enhanced by 50 due to both SP coupling and improved electrical properties. The results presented here can provide a very promising way to significantly enhance the performance of Si NC LED. © 2012 American Institute of Physics.
- KSP Keywords
- Au nanoparticles(Au-NPs), Emission Efficiency, Light Emission, Light output power(Lop), Light-emitting diodes (leds), Oxide interface, Photoluminescence intensity, Resonance mode, Si nanocrystal, Strong coupling, Surface plasmon(SP)