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Open AccessArticle

Enhanced Photon Emission Efficiency Using Surface Plasmon Effect of Pt Nanoparticles in Ultra-Violet Emitter

1
Department of Advanced Convergence Technology, and Research Institute of Advanced Convergence Technology, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si 15073, Korea
2
Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48109, USA
3
Department of Nano-optical engineering, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si 15073, Korea
*
Authors to whom correspondence should be addressed.
Micromachines 2019, 10(8), 528; https://doi.org/10.3390/mi10080528
Received: 29 June 2019 / Revised: 2 August 2019 / Accepted: 7 August 2019 / Published: 9 August 2019
(This article belongs to the Special Issue Nanostructured Light-Emitters)
We demonstrate the surface plasmon (SP)-enhanced ultraviolet (UV) emitter using Pt nanoparticles (NPs). The UV emitter is hole-patterned on the p-AlGaN layer to consider the penetration depth of Pt NPs. The Pt NPs with sizes under 50 nm are required to realize the plasmonic absorption in UV wavelength. In this study, we confirm the average Pt NP sizes of 10 nm, 20 nm, and 25 nm, respectively, at an annealing temperature of 600 °C. The absorption of annealed Pt NPs is covered with the 365-nm wavelength. The electroluminescence intensity of SP-UV is 70% higher than that of reference UV emitter without hole-patterns and Pt NPs. This improvement can be attributed to the increase of spontaneous emission rate through resonance coupling between the excitons in multiple quantum wells and Pt NPs deposited on the p-AlGaN layer. View Full-Text
Keywords: ultraviolet (UV) emitter; surface plasmon; Pt nanoparticles; hole-pattern; photon emission efficiency ultraviolet (UV) emitter; surface plasmon; Pt nanoparticles; hole-pattern; photon emission efficiency
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MDPI and ACS Style

Choi, H.-J.; Kim, S.; Chu, E.-K.; Noh, B.-R.; Lee, W.-S.; Kwon, S.-H.; Oh, S.; Kim, K.-K. Enhanced Photon Emission Efficiency Using Surface Plasmon Effect of Pt Nanoparticles in Ultra-Violet Emitter. Micromachines 2019, 10, 528.

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