Spectroscopic properties of Pr3+:Gd3Ga5O12 crystal

Wang, Yan; Li, Jianfu; You, Zhenyu; Zhu, Ziming; Tu, Chaoyang

doi:10.1016/j.jallcom.2010.04.140

Cited by 36 publications

(5 citation statements)

References 43 publications

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“…We have found, however, that the temporal behavior of the 3 P 0 level can be modeled by a simple biexponential decay, as sometimes found with other Pr-doped compounds: − where τ 1 and τ 2 are the slow and fast decay components (long and short lifetimes), and A 1 and A 2 are the fitting weighing factor parameters. The best fitting for NC is shown in Figure .…”

Section: Resultssupporting

confidence: 54%

Pr³⁺:BaY₂F₈ Crystal Nanoparticles (24 nm) Produced by High-Energy Ball Milling: Spectroscopic Characterization and Comparison with Bulk Properties

Hakim¹,

Damak²,

Gemmi

et al. 2015

J. Phys. Chem. C

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Nanocrystals (NC) of Pr 3+ :BaY 2 F 8 with average diameter of 24 nm have been successfully prepared by highenergy ball milling. The method is versatile, easily scalable, and does not require the use of surfactants or catalysts. NC were prepared starting from high quality single crystal pieces, and their spectroscopic features are analyzed and compared with those of a single bulk crystal. Under 445 nm excitation, we recorded the 10 K and room temperature emission spectra of the two samples. The spectra show the same peak positions and width, and this means that the milling process does not introduce substantial modifications to the crystal structure. Besides, there are strong differences in the relative intensity of the lines emitted toward different lower lying levels in the two samples. In particular, the high-energy transitions seem to be hyper intense in the NC with respect to the bulk sample. On the contrary, the emission lines that end at excited levels are less intense in the NC. In addition, the time evolution of the 3 P 0 decay shows striking differences between the nanosized materials and the bulk sample. Despite the exponential decay of the latter luminescence (τ = 43 μs), NC possess a strong nonlinear component with a lifetime much shorter than in the bulk. Calculations show that nearly 89% of the excited ions contribute to the short-time decay, which is attributed to ions residing near the NC surface.

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Section: Resultssupporting

confidence: 54%

Pr³⁺:BaY₂F₈ Crystal Nanoparticles (24 nm) Produced by High-Energy Ball Milling: Spectroscopic Characterization and Comparison with Bulk Properties

Hakim¹,

Damak²,

Gemmi

et al. 2015

J. Phys. Chem. C

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“…6. The fluorescence lifetime of the 1 D 2 energy level in the 0.5, 1.0, and 2.0-at.% Pr:CNGG crystals are estimated at 47.52 µs, 37.63 µs, and 26.24 µs, which are smaller than that of 0.5% Pr:YAG (110 µs), [23] 1% Pr:GGG (118 µs), [24] but larger than that of 1% Pr:YAP (28 µs). [25] The fluorescence lifetime decreases from 47.52 µs to 26.24 µs when the doping concentration of Pr 3+ increases from 0.5 at.% to 2.0 at.%, which is mainly due to the depopulation of the 1 D 2 level, caused by CR2 as shown in Fig.…”

Section: Spectral Propertiesmentioning

confidence: 85%

Spectral properties of Pr:CNGG crystals grown by micro-pulling-down method*

Xue

et al. 2019

Chinese Phys. B

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Pr3+-doped calcium niobium gallium garnet (Pr:CNGG) single crystals with different Pr3+concentrations are successfully grown by the micro-pulling-down (μ-PD) method. The crystal structure, room-temperature absorption spectra, and fluorescence spectra of Pr:CNGG crystals are measured and discussed. The fluorescence results indicate their large dependence on the doping concentration. The fluorescence lifetime of the D 2 1 energy level is also determined. The results indicate that Pr:CNGG crystal could be a potential solid-state laser gain medium.

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“…In the PL spectrum of the GGG:Pr 3+ (Figure 2b), sharp PL lines are observed mainly at 485, 560, 617, and 650–750 nm, which are attributed to Pr 3+ : 3 P 0 → 3 H 4 , 3 P 1 → 3 H 5 , 3 P 0 → 3 H 6 , and 3 P 0 → 3 F J ( J = 2,3,4), respectively. [ 34 ] In the PLE of the GGG:Pr 3+ sample (Figure 2a), a broad band at 280 nm and sharp lines at 460 nm are observed. The broad PLE band is attributed to the Pr 3+ : 4 f –5 d transition and the sharp lines are attributed to the Pr 3+ : 3 H 4 → 3 P J transitions.…”

Section: Resultsmentioning

confidence: 99%

Development of White Persistent Phosphors by Manipulating Lanthanide Ions in Gadolinium Gallium Garnets

Ueda

Miyano

et al. 2021

Advanced Photonics Research

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Lanthanide ions act as excellent luminescence centers and good charge carrier traps. By selecting proper lanthanide ions, persistent phosphors with the desired luminescent color can be developed. In addition, an appropriate host material can give not only better persistent luminescence performance but also an additional function. Herein, bright white persistent phosphors of Pr3+–Tb3+–Eu3+ tridoped paramagnetic Gd3Ga5O12 (GGG) are successfully developed. The GGG phosphors singly doped with Pr3+, Tb3+, and Eu3+ show reddish‐white (3PJ–3HJ), blue (5DJ–7FJ), and red (5D0–7FJ) photoluminescence, respectively, by UV excitation. On the other hand, the GGG samples codoped with Pr3+–Eu3+ and with Tb3+–Eu3+ show only Pr3+ reddish‐white persistent luminescence and Tb3+ blue persistent luminescence, respectively. Based on the thermoluminescence glow curves, it is found that the Eu3+ ion acts only as an electron trap in the persistent luminescence mechanism and the trapped electrons are released at around 325 K. The cool‐white persistent luminescence is achieved by combining Pr3+ and Tb3+ persistent luminescence centers in the GGG:Pr3+–Tb3+–Eu3+ phosphors. It is demonstrated that the white persistent phosphor powder in water can be dragged around by a permanent magnet due to the paramagnetic property of GGG.

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Spectroscopic properties of Pr3+:Gd3Ga5O12 crystal

Cited by 36 publications

References 43 publications

Pr³⁺:BaY₂F₈ Crystal Nanoparticles (24 nm) Produced by High-Energy Ball Milling: Spectroscopic Characterization and Comparison with Bulk Properties

Pr³⁺:BaY₂F₈ Crystal Nanoparticles (24 nm) Produced by High-Energy Ball Milling: Spectroscopic Characterization and Comparison with Bulk Properties

Spectral properties of Pr:CNGG crystals grown by micro-pulling-down method*

Development of White Persistent Phosphors by Manipulating Lanthanide Ions in Gadolinium Gallium Garnets

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Spectroscopic properties of Pr3+:Gd3Ga5O12 crystal

Cited by 36 publications

References 43 publications

Pr3+:BaY2F8 Crystal Nanoparticles (24 nm) Produced by High-Energy Ball Milling: Spectroscopic Characterization and Comparison with Bulk Properties

Pr3+:BaY2F8 Crystal Nanoparticles (24 nm) Produced by High-Energy Ball Milling: Spectroscopic Characterization and Comparison with Bulk Properties

Spectral properties of Pr:CNGG crystals grown by micro-pulling-down method*

Development of White Persistent Phosphors by Manipulating Lanthanide Ions in Gadolinium Gallium Garnets

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Product

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Pr³⁺:BaY₂F₈ Crystal Nanoparticles (24 nm) Produced by High-Energy Ball Milling: Spectroscopic Characterization and Comparison with Bulk Properties

Pr³⁺:BaY₂F₈ Crystal Nanoparticles (24 nm) Produced by High-Energy Ball Milling: Spectroscopic Characterization and Comparison with Bulk Properties