Enhanced Luminescence of InGaN Quantum Well Structures with Localized Surface Plasmon by Using Sputter-Fabricated Ag Nanoparticles in an Ionic Liquid

Won Wook Lee, Alexander Y. Polyakov, Taehwan Kim, In-Hwan Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Small, uniform Ag nanoparticles (NPs) in ionic liquids (ILs) are synthesized via simple sputtering route. The NPs embedded in polymer film are coated on top of InGaN/GaN active multiple quantum-well light-emitting structures and their optical characteristics are compared. The InGaN structures coated with Ag NPs show a significant increase in photoluminescence efficiency, mainly caused by localized surface plasmon (LSPs) coupling. Time-resolved (TR) photoluminescence analysis demonstrates that the coupling efficiency is 47.2%. The increased luminescence is caused by good energy matching between the surface plasmon and the light emitter. The authors believe that present work takes a first step to utilize the advantages of metal NPs synthesized in ILs and has a great potential for use in various optoelectronic devices.

Original languageEnglish
Article number1800516
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume215
Issue number24
DOIs
Publication statusPublished - 2018 Dec 19

Keywords

  • ionic liquid
  • localized surface plasmons
  • metal nanoparticles
  • photoluminescence

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry

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