Improved light emission of GaN-based light-emitting diodes by efficient localized surface plasmon coupling with silver nanoparticles

Lü, Cheng; Wu, Shang En; Lai, Yu-Cheng; Li, Yun Li; Liu, Chuan Pu

doi:10.1016/j.jallcom.2013.09.164

Cited by 17 publications

(9 citation statements)

References 29 publications

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“…Localized surface plasmons (LSPs), the charge density oscillations confined in metallic nanostructures, have attracted tremendous interest for a broad range of emerging applications, such as chemical and biomolecular sensing 1 2 3 4 , subwavelength optical imaging 5 6 , optoelectronic devices such as light emitting diodes (LEDs) 7 8 9 , solar cells 10 11 12 13 14 and photodetectors 15 16 17 18 . LSPs excited by an electric field at a particular incident wavelength where resonance occurs will lead to strong light scattering, intense absorption band and enhancement of the local electromagnetic fields 19 , The oscillation frequency and intensity i. e. coupling efficiency of LSPs can be modulated by the type of metals 20 .…”

mentioning

confidence: 99%

Asymmetric light reflectance from metal nanoparticle arrays on dielectric surfaces

Huang

Pan

Zhu

et al. 2015

Sci Rep

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Asymmetric light reflectance associated with localized surface plasmons excited in metal nanoparticles on a quartz substrate is observed and analyzed. This phenomenon is explained by the superposition of two waves, the wave reflected by the air/quartz interface and that reflected by the metal nanoparticles, and the resulting interference effects. Far field behavior investigation suggests that zero reflection can be achieved by optimizing the density of metal nanoparticles. Near field behavior investigation suggests that the coupling efficiency of localized surface plasmon can be additionally enhanced by separating the metal NPs from substrates using a thin film with refractive index smaller than the substrate. The latter behavior is confirmed via surface-enhanced Raman spectroscopy studies using metal nanoparticles on Si/SiO2 substrates.

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confidence: 99%

Asymmetric light reflectance from metal nanoparticle arrays on dielectric surfaces

Huang

Pan

Zhu

et al. 2015

Sci Rep

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“…Recently, the surface plasmon (SP) coupling effect, which can improve the extraction efficiency of InGaN/GaN LEDs, has received considerable research attention [24,25,26]. SP coupling effects are the collective oscillations of electrons at the interface of a metal and a dielectric, and they can be classified as surface plasmon polaritons (SPPs) at metal surfaces and localized surface plasmons (LSPs) of local oscillation among isolated metallic nanostructures (NPs) with a resonant frequency.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Light Extraction Efficiency for InGaN/GaN Light-Emitting Diodes Using Silver Nanoparticle Embedded ZnO Thin Films

et al. 2019

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In this study, we propose a liquid-phase-deposited silver nanoparticle embedded ZnO (LPD-Ag NP/ZnO) thin film at room temperature to improve the light extraction efficiency (LEE) for InGaN/GaN light-emitting diodes (LEDs). The treatment solution for the deposition of the LPD-Ag/NP ZnO thin film comprised a ZnO-powder-saturated HCl and a silver nitrate (AgNO3) aqueous solution. The enhanced LEE of an InGaN/GaN LED with the LPD-Ag NP/ZnO window layer can be attributed to the surface texture and localized surface plasmon (LSP) coupling effect. The surface texture of the LPD-Ag/NP ZnO window layer relies on the AgNO3 concentration, which decides the root-mean-square (RMS) roughness of the thin film. The LSP resonance or extinction wavelength also depends on the concentration of AgNO3, which determines the Ag NP size and content of Ag atoms in the LPD-Ag NP/ZnO thin film. The AgNO3 concentration for the optimal LEE of an InGaN/GaN LED with an LPD-Ag NP/ZnO window layer occurs at 0.05 M, which demonstrates an increased light output intensity that is approximately 1.52 times that of a conventional InGaN/GaN LED under a 20-mA driving current.

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“…Localized surface plasmon (LSP) has attracted much attention for the enhancement of light output in LEDs [11][12][13][14][15][16][17][18][19][20]. The LSP provides a fast energy transfer channel by coupling the excited dipole energy of MQWs into surface plasmon modes of noble metal particles and consequently enhances the spontaneous emission rate of MQWs, thereby improving the light output of LEDs.…”

Section: Introductionmentioning

confidence: 99%

“…However, the epitaxial growth process must be interrupted for the fabrication of metal particles and the epilayers following the metal particles may exhibit poor crystal quality. Alternately, after the epitaxial wafer was completely finished, the p-GaN layer was partially etched; if the etching part is thinner enough, the LSP assisted light emission was significantly enhanced [18][19][20]. For the case of nanorod LEDs, the noble metal particles can be placed in the gaps between the nanorods without additional etching process.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Light Output of Dipole Source in GaN‐Based Nanorod Light‐Emitting Diodes by Silver Localized Surface Plasmon

Huang

Wang

et al. 2014

Journal of Nanomaterials

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The light output of dipole source in three types of light-emitting diodes (LEDs), including the conventional planar LED, the nanorod LED, and the localized surface plasmon (LSP) assisted LED by inserting silver nanoparticles in the gaps between nanorods, was studied by use of two-dimensional finite difference time domain method. The height of nanorod and the size of silver nanoparticles were variables for discussion. Simulation results show that a large height of nanorod induces strong wavelength selectivity, which can be significantly enhanced by LSP. On condition that the height of nanorod is 400 nm, the diameter of silver nanoparticle is 100 nm, and the wavelength is 402.7 nm, the light-output efficiency for LSP assisted LED is enhanced by 190% or 541% as compared to the nanorod counterpart or the planar counterpart, respectively. The space distribution of Poynting vector was present to demonstrate the significant enhancement of light output at the resonant wavelength of LSP.

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Improved light emission of GaN-based light-emitting diodes by efficient localized surface plasmon coupling with silver nanoparticles

Cited by 17 publications

References 29 publications

Asymmetric light reflectance from metal nanoparticle arrays on dielectric surfaces

Asymmetric light reflectance from metal nanoparticle arrays on dielectric surfaces

Enhancement of Light Extraction Efficiency for InGaN/GaN Light-Emitting Diodes Using Silver Nanoparticle Embedded ZnO Thin Films

Enhanced Light Output of Dipole Source in GaN‐Based Nanorod Light‐Emitting Diodes by Silver Localized Surface Plasmon

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