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학술지 Enhancement in Light Emission Efficiency of Si Nanocrystal Light-Emitting Diodes by a Surface Plasmon Coupling
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저자
허철, 최철종, 김완중, 김봉규, 박병준, 장은혜, 김상협, 성건용
발행일
201205
출처
Applied Physics Letters, v.100 no.18, pp.1-5
ISSN
0003-6951
출판사
American Institute of Physics (AIP),
DOI
https://dx.doi.org/10.1063/1.4711033
협약과제
11SF1100, 시각 생체 모방 소자 및 인지 시스템 기술 개발, 정명애
초록
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 제안 키워드
Au nanoparticles(Au-NPs), Emission Efficiency, Light Emission, Light output power(Lop), Light-emitting diodes (leds), Photoluminescence intensity, Resonance mode, Schottky barriers(SBs), Si nanocrystal, Strong coupling, Surface plasmon(SP)