利用铂纳米粒子在紫外发射器中的表面等离子体效应提高光子发射效率

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

作者信息

Choi Hee-Jung, Kim Sohyeon, Chu Eun-Kyung, Noh Beom-Rae, Lee Won-Seok, Kwon Soon-Hwan, Oh Semi, Kim Kyoung-Kook

机构信息

Department of Advanced Convergence Technology, and Research Institute of Advanced Convergence Technology, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si 15073, Korea.

Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor,MI 48109, USA.

出版信息

Micromachines (Basel). 2019 Aug 9;10(8):528. doi: 10.3390/mi10080528.

DOI:10.3390/mi10080528

PMID:31405059

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6722722/

Abstract

We demonstrate the surface plasmon (SP)-enhanced ultraviolet (UV) emitter using Pt nanoparticles (NPs). The UV emitter is hole-patterned on the 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 -AlGaN layer.

摘要

我们展示了使用铂纳米颗粒（NPs）的表面等离子体（SP）增强型紫外（UV）发射器。为了考虑铂纳米颗粒的穿透深度，紫外发射器在AlGaN层上采用了孔图案。需要尺寸小于50nm的铂纳米颗粒来实现紫外波长下的等离子体吸收。在本研究中，我们证实了在600°C的退火温度下，铂纳米颗粒的平均尺寸分别为10nm、20nm和25nm。退火后的铂纳米颗粒的吸收覆盖了365nm波长。表面等离子体紫外发射器的电致发光强度比没有孔图案和铂纳米颗粒的参考紫外发射器高70%。这种改善可归因于多量子阱中的激子与沉积在AlGaN层上的铂纳米颗粒之间通过共振耦合导致的自发发射率增加。