4.6 Article

Enhanced optical output of InGaN/GaN near-ultraviolet light-emitting diodes by localized surface plasmon of colloidal silver nanoparticles

Journal

NANOTECHNOLOGY
Volume 26, Issue 38, Pages -

Publisher

IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/26/38/385204

Keywords

surface plasmon; light-emitting diode; nanoparticle; near-ultraviolet; spray process

Funding

  1. National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning (CELA-NCRC) [2008-0062606]
  2. APRI-Research Program through Gwangju Institute of Science and Technology (GIST), South Korea

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We report on the characteristics of localized surface plasmon (LSP)-enhanced near-ultraviolet light-emitting diodes (NUV-LEDs) fabricated by using colloidal silver (Ag) nanoparticles (NPs). Colloidal Ag NPs were deposited on the 20 nm thick p-GaN spacer layer using a spray process. The optical output power of NUV-LEDs with colloidal Ag NPs was increased by 48.7% at 20 mA compared with NUV-LEDs without colloidal Ag NPs. The enhancement was attributed to increased internal quantum efficiency caused by the resonance coupling between excitons in the multiple quantum wells and the LSPs in the Ag NPs.

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