Quantum efficiency control of InGaN/GaN multi-quantum-well structures using Ag/SiO 2 core-shell nanoparticles

Lee Woon Jang, Trilochan Sahoo, Dae Woo Jeon, Myoung Kim, Ju Won Jeon, Dong Seob Jo, Min Kyu Kim, Yeon Tae Yu, Alexander Y. Polyakov, In Hwan Lee

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Photoluminescence (PL) efficiency increase up to 2.8 times was observed for GaN/InGaN multi-quantum-well (MQW) structures as a result of deposition of a thin layer of about 40-nm-diameter Ag nanoparticles (NPs) surrounded by SiO 2 shell. These Ag/SiO 2 NPs were prepared by sol-gel method. The amount of PL intensity enhancement decreased with increasing the SiO 2 shell thickness. PL intensity increase was accompanied by corresponding decrease of PL decay time and is ascribed to a strong coupling of MQW region to localized surface plasmons (LSPs) associated with Ag/SiO 2 NPs.

Original languageEnglish
Article number251114
JournalApplied Physics Letters
Issue number25
Publication statusPublished - 2011 Dec 19
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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