Luminescence properties in the visible of Dy:YAG/YAG planar waveguides

Klimczak, Mariusz; Malinowski, M.; Sarnecki, J.; Piramidowicz, Ryszard

doi:10.1016/j.jlumin.2009.04.073

Cited by 58 publications

(17 citation statements)

References 4 publications

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“…With the more covalent lattice and particularly via an efficient Gd 3+ → Dy 3+ energy transfer, greatly enhanced blue and yellow emissions were simultaneously attained. The optimal Dy 3+ concentration was found to be ∼2.5 at%, close to the ∼2.0 at% reported for YAG [69], above which luminescence quenching occurs via dipole-dipole interactions. The excitation behaviors of [(Gd 1- x Lu x ) 0.975 Dy 0.025 ]AG, (Y 0.975 Dy 0.025 )AG, and (Lu 0.975 Dy 0.025 )AG ( x = 1.0) are compared in figure 13, where the intra-4f 9 excitations of Dy 3+ are similarly found at ∼326, 352, 366, and 386 nm for the 6 H 15/2 to 6 P 3/2 , 4 I 11/2 + 4 M 15/2 + 6 P 7/2 , 4 P 3/2 + 6 P 3/2 , 5/2 , and 4 I 13/2 + 4 F 7/2 + 4 K 17/2 + 4 M 19/2,21/2 transitions, respectively.…”

Section: Down-conversion (Dc) Phosphors Based On Gagsupporting

confidence: 79%

“…The primary interest in using Dy 3+ as an activator is that it simultaneously emits blue (∼483 nm, 4 F 9/2 → 6 H 15/2 transition) and yellow (∼584 nm, 4 F 9/2 → 6 H 13/2 transition) lights, which are needed to develop white light in LEDs and optical display systems [69]. Dy 3+ -containing compounds are also used as thermographic phosphors to measure surface temperature by applying a thin coating of the phosphor to the substrate [70].…”

Section: Down-conversion (Dc) Phosphors Based On Gagmentioning

confidence: 99%

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Recent progress in advanced optical materials based on gadolinium aluminate garnet (Gd₃Al₅O₁₂)

Sakka

2015

Science and Technology of Advanced Materials

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This review article summarizes the recent achievements in stabilization of the metastable lattice of gadolinium aluminate garnet (Gd3Al5O12, GAG) and the related developments of advanced optical materials, including down-conversion phosphors, up-conversion phosphors, transparent ceramics, and single crystals. Whenever possible, the materials are compared with their better known YAG and LuAG counterparts to demonstrate the merits of the GAG host. It is shown that novel emission features and significantly improved luminescence can be attained for a number of phosphor systems with the more covalent GAG lattice and the efficient energy transfer from Gd3+ to the activator. Ce3+ doped GAG-based single crystals and transparent ceramics are also shown to simultaneously possess the advantages of high theoretical density, fast scintillation decay, and high light yields, and hold great potential as scintillators for a wide range of applications. The unresolved issues are also pointed out.

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Section: Down-conversion (Dc) Phosphors Based On Gagsupporting

confidence: 79%

Section: Down-conversion (Dc) Phosphors Based On Gagmentioning

confidence: 99%

Recent progress in advanced optical materials based on gadolinium aluminate garnet (Gd₃Al₅O₁₂)

Sakka

2015

Science and Technology of Advanced Materials

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“…Dy 3+ emissions from the 4 F 9/2 level suffer from presence of many possible cross-relaxation channels, which all result in nonradiative quenching of 4 F 9/2 population to the levels below 6 F 3/2 . 39 The explanations for this photoluminescence quenching generally is associated to the resonant energy transfer from the Dy 3+ excited state 4 F 9/2 to nearby Dy 3+ ion in 6 H 15/2 ground state. Nagli et al 40 affirm that this process leads the first ion in the intermediate level 6 H 9/2 and the second one in 6 F 11/2 , which occurs in resonance with the 4 F 9/ 2 ?…”

Section: (5) Photoluminescencementioning

confidence: 99%

White‐Light and Yellow/Blue Photoluminescence Emission Based on Dy³⁺‐Doped SiO₂–Gd₂O₃ Composites

et al. 2016

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This work attempts to obtain Dy3+‐doped SiO2–Gd2O3 by sol–gel process, with a molar ratio of 70Si4+–30Gd3+ and Dy3+ concentrations of 0.1, 0.3, 0.5, and 1 mol%. Heat treatment at temperatures of 1000°C, 1100°C, 1200°C, and 1300°C have been performed. From XRD, the Gd2O3 cubic phase was observed at 1000°C and 1100°C, at 1200°C also were observed Gd2O3 monoclinic phase, predominant at 1300°C. The band‐gap values vary between 4.4 and 5.3 eV, showing dependence on the crystalline phase. Under UV excitation, emission spectra show bands assigned to the Dy3+ transitions: 4F9/2→6H15/2 (484 nm), 4F9/2→6H13/2 (572 nm), and 4F9/2→6H11/2 (668 nm). The excitation at 275 nm has shown more effective. The ratio between the most intense emission bands (yellow/blue) show values around 0.84 and 1.63. CIE chromaticity diagrams show color coordinates at blue, yellow, and white regions, as a function of Dy3+ concentration and heat treatment. The lifetime values of excited state 4F9/2 were around 0.20 and 0.69 ms. The morphology of particles changed from spherical to coral‐like shape as a function of heat treatment are observed. The sol–gel process showed to be an interesting route to obtain Dy3+‐doped binary system materials.

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“…Dy 3? doped LnAG luminescent materials were reported by many researchers [4,[9][10][11][12][13][14]. Previous studies showed that the characteristics emission intensity of Dy 3?…”

Section: Introductionmentioning

confidence: 99%

Enhanced luminescence of Dy3+/Bi3+ co-doped Gd3Al5O12 phosphors by high-efficiency energy transfer

Tian

Wang

Zhang

et al. 2015

J Mater Sci: Mater Electron

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Series samples of Dy 3? /Bi 3? co-doped Gd 3 Al 5 O 12 phosphors were successfully prepared by sol-gel combustion method. The phase composition, morphology and luminescence properties were investigated by X-ray diffraction, scanning electron microscope, photoluminescence, UV-Vis diffuse reflectance spectra, and fluorescent decay curves. Dy 3? -Bi 3? co-doping had no significant effect on the host lattice of Gd 3 Al 5

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Luminescence properties in the visible of Dy:YAG/YAG planar waveguides

Cited by 58 publications

References 4 publications

Recent progress in advanced optical materials based on gadolinium aluminate garnet (Gd₃Al₅O₁₂)

Recent progress in advanced optical materials based on gadolinium aluminate garnet (Gd₃Al₅O₁₂)

White‐Light and Yellow/Blue Photoluminescence Emission Based on Dy³⁺‐Doped SiO₂–Gd₂O₃ Composites

Enhanced luminescence of Dy3+/Bi3+ co-doped Gd3Al5O12 phosphors by high-efficiency energy transfer

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Luminescence properties in the visible of Dy:YAG/YAG planar waveguides

Cited by 58 publications

References 4 publications

Recent progress in advanced optical materials based on gadolinium aluminate garnet (Gd3Al5O12)

Recent progress in advanced optical materials based on gadolinium aluminate garnet (Gd3Al5O12)

White‐Light and Yellow/Blue Photoluminescence Emission Based on Dy3+‐Doped SiO2–Gd2O3 Composites

Enhanced luminescence of Dy3+/Bi3+ co-doped Gd3Al5O12 phosphors by high-efficiency energy transfer

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About

Recent progress in advanced optical materials based on gadolinium aluminate garnet (Gd₃Al₅O₁₂)

Recent progress in advanced optical materials based on gadolinium aluminate garnet (Gd₃Al₅O₁₂)

White‐Light and Yellow/Blue Photoluminescence Emission Based on Dy³⁺‐Doped SiO₂–Gd₂O₃ Composites