Y4GeO8荧光粉中Sm3+的浓度和温度依赖性荧光猝灭和judd - felt分析

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-03-07 DOI:10.1016/j.jlumin.2025.121172

Shengyi Liu , Duan Gao , Xin Chen , Han Yin , Ying Zhu , Li Wang , Wenbin Song , Jingjing Zhang , Shang Gao

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引用次数: 0

摘要

采用高温固相反应法制备了一系列不同Sm3+浓度的Y4GeO8:Sm3+荧光粉。通过x射线衍射（XRD）分析了这些荧光粉的晶体结构，证实了Y4GeO8:Sm3+相的纯度。采用荧光光谱法研究了Y4GeO8:Sm3+荧光粉的浓度猝灭和发光热稳定性。应用Van Uitert模型，证明了四极-四极相互作用促进了Sm3+离子之间的能量传递。进一步深入了解了温度依赖性荧光，揭示了基于arrhenius的交叉过程准确地描述了Y4GeO8粉末中Sm3+的4G5/2水平的热猝灭行为。最后，利用扩散衍射光谱和荧光衰减曲线，根据Judd-Ofelt理论分析了Sm3+在Y4GeO8荧光粉中的光学跃迁特性。

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Concentration and temperature dependent fluorescent quenching and Judd-Ofelt analysis of Sm3+ in Y4GeO8 phosphors

A range of Y₄GeO₈:Sm³⁺ phosphors featuring varying Sm³⁺ concentrations has been synthesized via high-temperature solid-state reaction method. Through X-ray diffraction (XRD) analysis, the crystalline structure of these phosphors was examined, confirming the purity of the Y₄GeO₈:Sm³⁺ phase. To study the concentration quenching and luminescence thermal stability of the Y₄GeO₈:Sm³⁺ phosphors, fluorescence spectroscopy was employed. Applying Van Uitert's model, it was demonstrated that the quadrupole–quadrupole interaction facilitates energy transfer among Sm³⁺ ions. Further insights into temperature-dependent fluorescence were gained, revealing that the Arrhenius-based crossover process accurately portrays the thermal quenching behavior of the ⁴G_5/2 level for Sm³⁺ in Y₄GeO₈ powders. Lastly, leveraging the diffuse-diffraction spectrum and fluorescence decay curve, the optical transition characteristics of Sm³⁺ in the examined Y₄GeO₈ phosphors were analyzed in accordance with Judd-Ofelt theory.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.