Photoluminescence properties of Tb-doped and (Zn,Tb) co-doped barium strontium titanate crystalline powders

Zhao, Lili; Li, Yanqiu; Zhai, Chunxue; Liao, Fuyou; Gao, Yongjin

doi:10.1016/j.jallcom.2016.09.332

Cited by 13 publications

(6 citation statements)

References 34 publications

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“…verified that the emission peaks in the emission luminescence spectrum of Gd 2 O 2 S:Tb 3+ locate at wavelengths of 545, 585, and 620 nm, and the highest peaks locate at wavelengths of 545 nm ( 20 ). It is consistent with the conclusion on the luminescence properties of Tb 3+ doping and it corresponds to green emission ( 21 ). Due to reduced tissue-scattering effect resulting from longer wavelength, Eu 3+ -based nanometer material is more commonly used as X-ray excitable nanophosphors.…”

Section: Introductionsupporting

confidence: 92%

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A Finite Element Mesh Regrouping Strategy-Based Hybrid Light Transport Model for Enhancing the Efficiency and Accuracy of XLCT

Chu

et al. 2022

Front. Oncol.

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X-ray luminescence computed tomography (XLCT) is an emerging hybrid imaging modality in optical molecular imaging, which has attracted more attention and has been widely studied. In XLCT, the accuracy and operational efficiency of an optical transmission model play a decisive role in the rapid and accurate reconstruction of light sources. For simulation of optical transmission characteristics in XLCT, considering the limitations of the diffusion equation (DE) and the time and memory costs of simplified spherical harmonic approximation equation (SPN), a hybrid light transport model needs to be built. DE and SPN models are first-order and higher-order approximations of RTE, respectively. Due to the discontinuity of the regions using the DE and SPN models and the inconsistencies of the system matrix dimensions constructed by the two models in the solving process, the system matrix construction of a hybrid light transmission model is a problem to be solved. We provided a new finite element mesh regrouping strategy-based hybrid light transport model for XLCT. Firstly, based on the finite element mesh regrouping strategy, two separate meshes can be obtained. Thus, for DE and SPN models, the system matrixes and source weight matrixes can be calculated separately in two respective mesh systems. Meanwhile, some parallel computation strategy can be combined with finite element mesh regrouping strategy to further save the system matrix calculation time. Then, the two system matrixes with different dimensions were coupled though repeated nodes were processed according to the hybrid boundary conditions, the two meshes were combined into a regrouping mesh, and the hybrid optical transmission model was established. In addition, the proposed method can reduce the computational memory consumption than the previously proposed hybrid light transport model achieving good balance between computational accuracy and efficiency. The forward numerical simulation results showed that the proposed method had better transmission accuracy and achieved a balance between efficiency and accuracy. The reverse simulation results showed that the proposed method had superior location accuracy, morphological recovery capability, and image contrast capability in source reconstruction. In-vivo experiments verified the practicability and effectiveness of the proposed method.

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Section: Introductionsupporting

confidence: 92%

“…which investigated fluorescence characterization of EO ( 35 ). The Commission international de l’Eclairage (CIE) coordinates served as a tool to figure out the optical mechanism of the human eye exposed to a specified spectrum ( 21 ). The calculated chromatic coordinates of EO powders are (0.6490, 0.3506), as shown in Figure 1E .…”

Section: Methodsmentioning

confidence: 99%

A Finite Element Mesh Regrouping Strategy-Based Hybrid Light Transport Model for Enhancing the Efficiency and Accuracy of XLCT

Chu

et al. 2022

Front. Oncol.

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“…† In this host, the Zn site with the 4e Wyckoff position which creates high stress in the lattice. There exist three kinds of Zn 2+ cation sites (Zn 10 , Zn 14 , and Zn 19 ) and three positions of Na + sites: Na (6), Na (7), and Na (18) with a coordination number (CN), CN ¼ 6 for Na (6) and Na (7) and CN ¼ 8 for Na (18). The interatomic distances of P-O, Zn-O, and the Na-O for the NZPO sample are listed in Table S3.…”

Section: Structure Of Productsmentioning

confidence: 99%

“…[1][2][3][4] Rare earth (RE 3+ ), transition metals, and Bi 3+ -activated phosphors have been extensively investigated due to their unique luminescence performance. [5][6][7][8][9] RE ions can emit fascinating colors thanks to their special 4f shell conguration. Different excitation energies and almost all of the visible light spectrum from violet to red can be obtained by combining different RE ions and varying the ratio of dopants.…”

Section: Introductionmentioning

confidence: 99%

Crystal structure, optical spectroscopy and energy transfer properties in NaZnPO₄:Ce³⁺, Tb³⁺ phosphors for UV-based LEDs

Saidi

Dammak

2020

RSC Adv.

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“…These luminescent materials are directly applicable in the design and advancement of innovative photonic appliances, for instance, fluorescent display devices, solid state lasers, optical detectors, solid‐state lighting, etc. [ 1–3 ] Further, crystalline luminescent materials (i.e. phosphors) have significantly played a vital role in energy efficient technology.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and optimization of photoluminescence properties in potential reddish orange emitting niobate phosphor for photonic device applications

et al. 2021

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A series of samarium ions (Sm3+) activated barium sodium niobate (Ba2NaNb5O15) samples have been successfully synthesized via employing a solid‐state reaction technique. Single phase, crystalline tetragonal Ba2NaNb5O15 were formed and the crystallite size of the prepared sample varied with doping of Sm3+ ions. The scanning electron microscopy (SEM) images of Ba2NaNb5O15:Sm3+ illustrate that the particles possess a non‐uniform spherical structure with some agglomeration. The prepared Ba2NaNb5O15:Sm3+ phosphors were efficiently excited with near‐ultraviolet (n‐UV) (406 nm) and emit strong visible emission peaks in the range 550–725 nm. The phenomenon of concentration quenching was detected after x = 0.10 mol of Sm3+ ions concentration for Ba2NaNb5O15, which arises due to non‐radiative energy transfer through dipole–dipole interaction among activator ions. Colour coordinates (0.586, 0.412) for the optimized phosphor lies in the visible reddish orange region. A bi‐exponential decay behaviour was observed for the photoluminescence decay curve of the optimized phosphor sample with an average decay time in milliseconds. The temperature dependent emission intensity confirms that the Ba2−xNaNb5O15:xSm3+ (x = 0.10 mol) phosphor exhibits adequate thermal stability having high value of activation energy (ΔE = 0.201 eV). The comprehensive study and analysis of the as‐prepared samples suggest that the intense reddish orange emitting thermally stable Ba2NaNb5O15:Sm3+ phosphor can act as a potential luminescent material in phosphor coated lighting, solar cells and other photonic devices.

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Photoluminescence properties of Tb-doped and (Zn,Tb) co-doped barium strontium titanate crystalline powders

Cited by 13 publications

References 34 publications

A Finite Element Mesh Regrouping Strategy-Based Hybrid Light Transport Model for Enhancing the Efficiency and Accuracy of XLCT

A Finite Element Mesh Regrouping Strategy-Based Hybrid Light Transport Model for Enhancing the Efficiency and Accuracy of XLCT

Crystal structure, optical spectroscopy and energy transfer properties in NaZnPO₄:Ce³⁺, Tb³⁺ phosphors for UV-based LEDs

Synthesis and optimization of photoluminescence properties in potential reddish orange emitting niobate phosphor for photonic device applications

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Photoluminescence properties of Tb-doped and (Zn,Tb) co-doped barium strontium titanate crystalline powders

Cited by 13 publications

References 34 publications

A Finite Element Mesh Regrouping Strategy-Based Hybrid Light Transport Model for Enhancing the Efficiency and Accuracy of XLCT

A Finite Element Mesh Regrouping Strategy-Based Hybrid Light Transport Model for Enhancing the Efficiency and Accuracy of XLCT

Crystal structure, optical spectroscopy and energy transfer properties in NaZnPO4:Ce3+, Tb3+ phosphors for UV-based LEDs

Synthesis and optimization of photoluminescence properties in potential reddish orange emitting niobate phosphor for photonic device applications

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Crystal structure, optical spectroscopy and energy transfer properties in NaZnPO₄:Ce³⁺, Tb³⁺ phosphors for UV-based LEDs