Enhanced emission from BaMgAl_10O_17:Eu^2+ by localized surface plasmon resonance of silver particles

Lee, Seong Min; Choi, Kyung Cheol

doi:10.1364/oe.18.012144

Cited by 43 publications

(29 citation statements)

References 21 publications

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“…Recently, researchers have tried to employ LSPR in lighting and display devices, such as OLEDs and LEDs [30]. Lee et al found that the photo luminescence intensity of phosphors was improved by LSPR effect owing to the Ag nanoparticles [31], and later they successfully promoted the luminescence intensity of phosphor-converted LEDs by simply mixing phosphors and metal nanoparticles in the silicone resin [32]. Therefore it is foreseeable that LSPR may also play a positive role in the enhancement of CTOE phosphor, nonetheless similar work was seldom reported.…”

Section: Introductionmentioning

confidence: 99%

Enhanced fluorescence and heat dissipation of calcium titanate red phosphor based on silver coating

Chen

Qin

Zhang

et al. 2015

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Enhanced fluorescence and heat dissipation of calcium titanate red phosphor based on silver coating

Chen

Qin

Zhang

et al. 2015

Journal of Colloid and Interface Science

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“…The interaction between light material and LSPR by metal nanoparticles can enhance the emission intensity from the emissive layer used in organic light emitting diodes (OLEDs), light emitting diodes (LEDs), and AC plasma display panels (ACPDPs) [2][3][4]. LSP-controllable luminescence has been observed in various light emitting materials, such as semiconductors, organic molecules, and rare earth ions.…”

Section: Introductionmentioning

confidence: 99%

“…By using a dielectric medium with a high refractive index, the extinction peaks under the same thickness of Ag nanoparticles moved 25 nm and 48 nm towards longer wavelength, respectively. The red-shift of the LSP peak is generally achieved by increasing the size and distribution of Ag nanoparticles [4]. In this work, we have tried to tune the plasmon resonance by adjusting the refractive index of the dielectric medium around Ag nanoparticles instead of controlling the morphologies of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Dependency of Plasmonic Enhancement on the Refractive Index of the Dielectric Bottom Layer of Ag Nanoparticles

Lee

Kim

Choi

2012

IEEE Photon. Technol. Lett.

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We investigated the dependency of plasmonenhanced luminescence on the refractive index of a dielectric substrate of Ag nanoparticles. We used silicon dioxide (n = 1.456) and indium tin oxide (n = 1.8) as bottom layers for Ag nanoparticles. Due to the extinction spectra of Ag nanoparticles on substrates with high refractive indexes, the localized surface plasmon band moved toward a longer wavelength. Asymmetric ratios for probing plasmon effects can increase in proportion to the extinction of Ag nanoparticles. Adjusting the dielectric medium connected to the Ag nanoparticles, the increase of the extinction and the asymmetric ratios, led to the enhancement of the emission intensities from the Eu 3+ ions.

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“…We derive this parameter using a semi-classical approach, and show its dependence on the dielectric constants of the system and on the distance from the metallic layer. Recently there has been considerable interest on utilizing surface plasmons in metallic thin films to enhance internal quantum efficiency of luminescent materials [1][2][3][4][5][6][7][8][9][10][11][12] and light emitting diodes (LED). …”

mentioning

confidence: 99%

Theory of Radiative Lifetime of an Activator Ion due to Surface Plasmons

Mishra

Collins

Piquette

2018

ECS J. Solid State Sci. Technol.

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We consider the lifetime of a phosphor layer situated near a metallic film. We first make general observations of the effect of the plasmons on the lifetime and quantum efficiency of the luminescent ions in the phosphor layer and on the role of the plasmons in the emission process. The effect of the plasmons in the excitation process and on the total luminescence from the system is also discussed. We then derive an expression for the lifetime of the optical ions interacting with the surface plasmon modes using the Einstein A and B coefficient formalism, which requires a determination of the mode density of the surface plasmons. Because the surface plasmons represent a 2-dimensional system, a length parameter must be introduced into the expression of the mode density. We derive this parameter using a semi-classical approach, and show its dependence on the dielectric constants of the system and on the distance from the metallic layer. Recently there has been considerable interest on utilizing surface plasmons in metallic thin films to enhance internal quantum efficiency of luminescent materials [1][2][3][4][5][6][7][8][9][10][11][12] and light emitting diodes (LED). 13-22The most important effect of the surface plasmons on luminescent ions is on their lifetime in the excited state which could contribute to improving the internal quantum efficiency of luminescent materials in the form of a slab or a layer. In this paper, we have studied how the change in the excited state lifetime of the radiating atoms could be described using the dispersion relations of the surface plasmons. The lifetime of an excited ion, τ as measured by the decay measurements consists of two components, radiative lifetime,τ R and nonradiative lifetime, τ N R the reciprocals of which are additive,The radiative lifetime of an ion depends on the transition moments of the ion, i.e., the matrix element of the electric dipole and quadrupole moments or magnetic moments between the excited and ground state wavefunctions of the radiating ions. Normally the radiative lifetime is a characteristic of the optical ion and does not change unless the wavefunctions of the optical ions are perturbed. On the other hand, nonradiative lifetime is associated with the relaxation of the excited state to phonons, lattice defects and impurities with a loss of the excited state energy. It is sometimes possible to increase the nonradiative lifetime by controlling the purity of the material, operating temperature, better material processing etc., thus decreasing the probability of nonradiative relaxation of the ion. From Eq. 1, it can be shown that when the nonradiative lifetime increases, the lifetime of the excited state increases. This increase in lifetime usually results in an increase of the internal quantum efficiency.If a new nonradiative pathway is opened, the nonradiative lifetime will decrease. It will not always decrease the internal quantum efficiency if the transferred energy is not completely lost as it is in the case of phonons. Such could be the case for s...

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Enhanced emission from BaMgAl_10O_17:Eu^2+ by localized surface plasmon resonance of silver particles

Cited by 43 publications

References 21 publications

Enhanced fluorescence and heat dissipation of calcium titanate red phosphor based on silver coating

Enhanced fluorescence and heat dissipation of calcium titanate red phosphor based on silver coating

Dependency of Plasmonic Enhancement on the Refractive Index of the Dielectric Bottom Layer of Ag Nanoparticles

Theory of Radiative Lifetime of an Activator Ion due to Surface Plasmons

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