Enhanced luminescence of GaN-based light-emitting diode with a localized surface plasmon resonance

Sung, Jong Hwan; Kim, Bo-Soon; Choi, Chul-Hyun; Lee, Minwoo; Lee, Seung‐Gol; Park, Se-Geun; Lee, El-Hang; Beom‐Hoan, O

doi:10.1016/j.mee.2009.01.009

Cited by 52 publications

(29 citation statements)

References 14 publications

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“…4 Surface plasmons in gold nanoparticle coatings have also been explored to couple the guided optical modes to external emission. 5 Perhaps the most successful efforts are texturing the surface of the LED for light extraction. Photonic crystals have been fabricated on LED surfaces, and an enhancement of 100% has been reported.…”

Section: Enhanced Efficiency Of Cdmgznse Down-converted Light Emittinmentioning

confidence: 99%

Enhanced efficiency of CdMgZnSe down-converted light emitting diodes using light extraction features fabricated by laser-speckle lithography

Yang

Haase

Leatherdale

et al. 2010

Journal of Applied Physics

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We report a method of making a wavelength converted, light-emitting diode (LED) having light extraction features based on coherent speckle patterns. These patterns have random feature size, random feature distribution, and random feature shape. The features were produced using a maskless lithography process based on exposing photoresist with a laser-induced coherent optical speckle pattern. A wet chemical etching process was then used to transfer the resist pattern into the underlying surface of the semiconductor wavelength converter layer. The external quantum efficiency of a wavelength converter with emitting surfaces having such extraction features showed a twofold increase compared to a wavelength converter without extraction features. While demonstrated here using semiconductor wavelength converters, this approach could also be applied to light extraction in conventional LED structures.

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Section: Enhanced Efficiency Of Cdmgznse Down-converted Light Emittinmentioning

confidence: 99%

Enhanced efficiency of CdMgZnSe down-converted light emitting diodes using light extraction features fabricated by laser-speckle lithography

Yang

Haase

Leatherdale

et al. 2010

Journal of Applied Physics

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“…When Ag nanoparticles were embedded in the semiconductor layers of InGaN/GaN mul-tiple QW (MQW) blue LEDs, the optical output power of these LEDs was enhanced by 32.2% [4]. An electroluminescence intensity enhancement of 1.8 times has also been observed for a GaN-based light-emitting diode with Au nanoparticle-arrayed layer [5]. Drezet et al [6] found that Au plasmonic gratings on a high index substrate (GaP) can enlarge the escape cone to increase the light extraction efficiency of LEDs.…”

mentioning

confidence: 94%

The application of the microstructured metallic grating to light emission extraction

Gou

Xuan

2013

Chin. Sci. Bull.

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Microstructured metallic gratings can be used to enhance the light emission efficiency of LEDs, and the spectral radiation properties of the LEDs vary with the different metallic materials used, leading to variation of the light emission enhancement at the same wavelength for different metallic grating materials. In this paper, the finite difference time domain (FDTD) method has been used to investigate the light emission extraction enhancement of LEDs in which gratings with different metallic materials have been applied. Through analysis of the permittivity of the metals and the quality factors of the surface plasmons (SPs), we concluded that the larger the plasma frequency obtained for the metallic interband transition, then the more suitable the metals are for light emission extraction of photons with relatively short wavelengths. This is because of the abundance of free electrons in the metals with large plasma frequencies. We also found that the wavelength-dependent trends of the extraction enhancement resulting from the scattering mechanism for different metallic materials are similar to each other. For SP-induced enhancement, either the enhancement peak position or the peak value changes significantly with the different metals.

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“…It has been shown that LEE can be sufficiently improved using proper micro-structures. These micro-structured LEDs include hemispherical source LEDs [6], funnel shaped LEDs [7], truncated-inverted-pyramid LEDs [8], surface textured LEDs [9], photonic crystal or grating assisted LEDs [10][11][12] and metal assisted LEDs [13][14][15][16][17]. The LEE improvements mostly rely on clever geometrical optical designs, which do not change the properties of spontaneous emission.…”

Section: Introductionmentioning

confidence: 99%

“…The photonic crystal and metal assisted LEDs are based on the photonic band gap and surface plasmons (SPs), respectively. In the past decades, the utilization of dielectric grating and plasmonic grating in LEDs has been widely studied [10][11][12][13][14][15][16][17]. In this paper, we use the combined plasmonic Ag grating and dielectric grating to improve the LEE of LEDs.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of light-emitting efficiency using combined plasmonic Ag grating and dielectric grating

Gou¹,

Xuan²,

Han³

et al. 2011

Journal of Luminescence

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Enhanced luminescence of GaN-based light-emitting diode with a localized surface plasmon resonance

Cited by 52 publications

References 14 publications

Enhanced efficiency of CdMgZnSe down-converted light emitting diodes using light extraction features fabricated by laser-speckle lithography

Enhanced efficiency of CdMgZnSe down-converted light emitting diodes using light extraction features fabricated by laser-speckle lithography

The application of the microstructured metallic grating to light emission extraction

Enhancement of light-emitting efficiency using combined plasmonic Ag grating and dielectric grating

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