Enhanced optical properties of nanopillar light-emitting diodes by coupling localized surface plasmon of Ag/SiO2 nanoparticles

Jin Hyeon Yun; Han Su Cho; Kang Bin Bae; Selvakumar Sudhakar; Yeon Su Kang; Jong Soo Lee; Alexander Y. Polyakov; In-Hwan Lee

doi:10.7567/APEX.8.092002

Enhanced optical properties of nanopillar light-emitting diodes by coupling localized surface plasmon of Ag/SiO₂ nanoparticles

Jin Hyeon Yun, Han Su Cho, Kang Bin Bae, Selvakumar Sudhakar, Yeon Su Kang, Jong Soo Lee, Alexander Y. Polyakov, In-Hwan Lee

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

We fabricated nanopillar light-emitting diodes (LEDs) embedded with Ag/SiO₂ nanoparticles, and investigated the energy coupling processes between the localized surface plasmons of nanoparticles and the active quantum well regions of nanopillar LEDs. These nanoparticle-embedded nanopillar LEDs showed considerable increases in photoluminescence and electroluminescence intensities, compared with reference nanopillar LEDs. The observed optical enhancement was explained by the increased spontaneous emission rate caused by energy coupling from excitons in the InGaN/GaN quantum well active region of the LEDs to the localized surface plasmon modes of the Ag/SiO₂ nanoparticles. A strongly enhanced characteristic photoluminescence decay also confirmed such an explanation.

Original language	English
Article number	092002
Journal	Applied Physics Express
Volume	8
Issue number	9
DOIs	https://doi.org/10.7567/APEX.8.092002
Publication status	Published - 2015 Sep 1
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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Enhanced optical properties of nanopillar light-emitting diodes by coupling localized surface plasmon of Ag/SiO₂ nanoparticles. / Yun, Jin Hyeon; Cho, Han Su; Bae, Kang Bin; Sudhakar, Selvakumar; Kang, Yeon Su; Lee, Jong Soo; Polyakov, Alexander Y.; Lee, In-Hwan.

In: Applied Physics Express, Vol. 8, No. 9, 092002, 01.09.2015.

Research output: Contribution to journal › Article › peer-review

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abstract = "We fabricated nanopillar light-emitting diodes (LEDs) embedded with Ag/SiO2 nanoparticles, and investigated the energy coupling processes between the localized surface plasmons of nanoparticles and the active quantum well regions of nanopillar LEDs. These nanoparticle-embedded nanopillar LEDs showed considerable increases in photoluminescence and electroluminescence intensities, compared with reference nanopillar LEDs. The observed optical enhancement was explained by the increased spontaneous emission rate caused by energy coupling from excitons in the InGaN/GaN quantum well active region of the LEDs to the localized surface plasmon modes of the Ag/SiO2 nanoparticles. A strongly enhanced characteristic photoluminescence decay also confirmed such an explanation.",

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AU - Yun, Jin Hyeon

AU - Cho, Han Su

AU - Bae, Kang Bin

AU - Sudhakar, Selvakumar

AU - Kang, Yeon Su

AU - Lee, Jong Soo

AU - Polyakov, Alexander Y.

AU - Lee, In-Hwan

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AB - We fabricated nanopillar light-emitting diodes (LEDs) embedded with Ag/SiO2 nanoparticles, and investigated the energy coupling processes between the localized surface plasmons of nanoparticles and the active quantum well regions of nanopillar LEDs. These nanoparticle-embedded nanopillar LEDs showed considerable increases in photoluminescence and electroluminescence intensities, compared with reference nanopillar LEDs. The observed optical enhancement was explained by the increased spontaneous emission rate caused by energy coupling from excitons in the InGaN/GaN quantum well active region of the LEDs to the localized surface plasmon modes of the Ag/SiO2 nanoparticles. A strongly enhanced characteristic photoluminescence decay also confirmed such an explanation.

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