Large-scale synthesis of Lu2O3:Ln3+ (Ln3+=Eu3+, Tb3+, Yb3+/Er3+, Yb3+/Tm3+, and Yb3+/Ho3+) microspheres and their photoluminescence properties

Gao, Yu; Gong, Jian; Fan, Miaomiao; Fang, Qinghong; Wang, Na; Xu, Zhenhe

doi:10.1016/j.materresbull.2012.08.065

Cited by 15 publications

(2 citation statements)

References 58 publications

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“…Cubic lutetium oxide, Lu 2 O 3 , space group Ia 3̅, is used in the development of scintillators, − traditional and upconversion phosphors, − and thermoluminescence (TL) materials. , The latter include afterglow, − persistence luminescence, , and permanent energy storage phosphors. − These properties are achieved via the introduction of appropriate dopants and codopants (selected rare earths and transition metal cations, respectively), as well as fine-tuning of the dopant concentrations and synthesis conditions (such as annealing temperature, sintering time, and atmosphere–oxidizing, reducing, neutral, or vacuum). The material is prone to defect formation, such as interstitial oxygen or oxygen vacancies.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Vacancy, Oxygen Vacancy–Vacancy Pairs, and Frenkel Defects in Cubic Lutetium Oxide

Shyichuk

Zych

2020

J. Phys. Chem. C

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Electronic and structural properties of cubic Lu2O3 with either single oxygen vacancy, oxygen vacancy–vacancy pair, or a Frenkel pair (an oxygen vacancy and an interstitial oxygen) were analyzed using ab initio density functional theory calculations. A plane-wave ultrasoft pseudopotential approach with local density approximation functional was used to optimize the geometries. A full-potential linearized augmented plane-wave method with meta-generalized gradient approximation was applied to the optimized geometries to calculate the electronic properties of the systems. Defect-related bands were observed between the valence band and the conduction band. Different charge states of the defects were considered. Both oxygen vacancy and oxygen vacancy–vacancy pairs behave as moderately deep electron traps (trap depth 1.3–2.7 eV). Trapped electron localization at the vacancy site(s) was confirmed using electron density and electron localization function plots. The bands originating from oxygen vacancy–vacancy pairs in Lu2O3 exhibit some dependence on the distance between the two entities. The resulting energy differences (considered from an optical absorption point of view) cover ultraviolet, visible, and infrared ranges. Thus, it is plausible that oxygen vacancy–vacancy pairs are responsible for the coloration that is sometimes observed in Lu2O3 powders and crystals. On the contrary, the Frenkel pair exhibits no systematic dependence of the defect-related bands on the distance between its oxygen vacancy and interstitial oxygen, while the resulting defect-related bands look similar to those corresponding to the isolated defects. Frenkel pairs are thus considered a probable mechanism of oxygen vacancy formation and stabilization of Lu2O3. Additionally, a brief review of the relevant experimental data is provided in the introduction.

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Section: Introductionmentioning

confidence: 99%

Oxygen Vacancy, Oxygen Vacancy–Vacancy Pairs, and Frenkel Defects in Cubic Lutetium Oxide

Shyichuk

Zych

2020

J. Phys. Chem. C

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“…Yttrium oxide (Y2O3) is an efficient luminescent host material， it has the cubic structure and a band gap large enough to accommodate the energy levels of many luminescent activators [1]. Recently, Lanthanide-ion-doped Y2O3 materials have been interestingly studied due to their unique physical and chemical properties and potential applications in the fields of luminescence devices, photonic crystals, and so forth [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Monodisperse Spherical SiO2@Y2O3: Tb3+ Particles with Core-Shell Structure

Liu

Kong

2014

AMR

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Spherical submicron SiO2 particles have been coated with luminescent Y2O3: Tb3+ layers by a Pechini sol-gel process, resulting in the formation of SiO2@Y2O3: Tb3+ core-shell particles. The obtained core–shell phosphors have perfect spherical shape with narrow size distribution (average size ca. 450 nm), smooth surface and non-agglomeration. The thickness of shells could be easily controlled by changing the number of deposition cycles (35 nm for two deposition cycles). Under the excitation of ultraviolet, the Tb3+ ion mainly shows its characteristic emissions in the core-shell particles from Y2O3: Tb3+) shells. The emission intensity of Tb3+ can be tuned by the annealing temperature and the number of coating cycles.

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Solvothermal Syntheses and Characterization of Three New Thioantimonates Combined with Lanthanide Complexes

et al. 2015

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Large-scale synthesis of Lu2O3:Ln3+ (Ln3+=Eu3+, Tb3+, Yb3+/Er3+, Yb3+/Tm3+, and Yb3+/Ho3+) microspheres and their photoluminescence properties

Cited by 15 publications

References 58 publications

Oxygen Vacancy, Oxygen Vacancy–Vacancy Pairs, and Frenkel Defects in Cubic Lutetium Oxide

Oxygen Vacancy, Oxygen Vacancy–Vacancy Pairs, and Frenkel Defects in Cubic Lutetium Oxide

Synthesis and Characterization of Monodisperse Spherical SiO<sub>2</sub>@Y<sub>2</sub>O<sub>3</sub>: Tb<sup>3+</sup> Particles with Core-Shell Structure

Solvothermal Syntheses and Characterization of Three New Thioantimonates Combined with Lanthanide Complexes

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