Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
Journal Home About Issues in Progress Current Issue All Issues Feature Issues

Experimental observation of electroluminescence enhancement on green LEDs mediated by surface plasmons

Kwang-Geol Lee, Ki-Young Choi, Jin-Ha Kim, and Seok Ho Song

Open Access Open Access

Abstract

We experimentally demonstrate the 1.5-fold enhancement of the electroluminescence (EL) of surface-plasmon (SP)-mediated green LEDs. On the p-clad surface of InGaN/GaN multi-quantum well LEDs, a 2-dimensional, second-order grating structure is textured and coated with an Ag electrode. With this setup, a larger EL enhancement factor is obtained at a higher injected current, which suggests that SP-LEDs can be a possible solution to efficiency droop, which is one of the main problems in developing high-power LEDs. Details regarding the implementation of our device are discussed.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Surface plasmon-enhanced nanoporous GaN-based green light-emitting diodes with Al2O3 passivation layer

Zhi-Guo Yu, Li-Xia Zhao, Xue-Cheng Wei, Xue-Jiao Sun, Ping-Bo An, Shi-Chao Zhu, Lei Liu, Li-Xin Tian, Feng Zhang, Hong-Xi Lu, Jun-Xi Wang, Yi-Ping Zeng, and Jin-Min Li
Opt. Express 22(S6) A1596-A1603 (2014)

Enhanced optical output and reduction of the quantum-confined Stark effect in surface plasmon-enhanced green light-emitting diodes with gold nanoparticles

Chu-Young Cho and Seong-Ju Park
Opt. Express 24(7) 7488-7494 (2016)

Enhanced optical output power by the silver localized surface plasmon coupling through side facets of micro-hole patterned InGaN/GaN light-emitting diodes

Kang Jea Lee, Seung Hwan Kim, Ah Hyun Park, Seul Be Lee, Gun Hee Lee, Gye-Mo Yang, Hai Dinh Pham, Hoang Thi Thu, Tran Viet Cuong, and Eun-Kyung Suh
Opt. Express 22(S4) A1051-A1058 (2014)

View More...

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (6)
Fig. 1
Fig. 1 A schematic of flip-chip reflection type InGaN QW LEDs mediated by SPs.

Download Full Size | PDF

Fig. 2
Fig. 2 (a) Purcell enhancement factors as a function of the diameter of the Ag pillar. (b) Reflectance of the Ag-pillar-grating as a function of the grating depth.

Download Full Size | PDF

Fig. 3
Fig. 3 (a) A TEM image of InGaN MQW (side view). SEM images of grating structure etched on p-GaN layer (b), and a side view of the Ag layer evaporated on p-GaN layer (c).

Download Full Size | PDF

Fig. 4
Fig. 4 (a) PL intensity spectra. (b) PL decay lifetimes measured at low (17 K) and room (300 K) temperatures. Data of the SP-LED and the reference are shown as red and black open-circles, respectively, and the solid lines are the fitting.

Download Full Size | PDF

Fig. 5
Fig. 5 (a) The EL of the SP-LED as a function of the injected current in the range of 0.01~0.1 A. 25% of the luminous enhancement is obtained at 0.1 A. (b) The current-voltage characteristic of the SP-LED. Almost constant improvement of 13% was observed in the entire current range.

Download Full Size | PDF

Fig. 6
Fig. 6 (a) The WPE of the SP-LED and the reference as a function of the injected current. (b) The WPE enhancement factor Δ η p o w e r is consistently increasing with the injected current, up to 51.2% at 0.1 A.

Download Full Size | PDF

Select as filters
Select Topics Cancel
Top
       
© Copyright 2024 | Optica Publishing Group. All rights reserved, including rights for text and data mining and training of artificial technologies or similar technologies.
Privacy | Terms of Use