Crystal Structure and Photoluminescence Properties of Ca3(PO4)2:Eu3+ Phosphors With High Emission Efficiency

IF 3 4区化学 Q2 CHEMISTRY, ANALYTICAL Luminescence Pub Date : 2025-01-23 DOI:10.1002/bio.70083

K. Park, D. H. Kim, J. W. Pi, S. Y. Gwon, E. C. Jeon, J. S. Kim

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Abstract

The influence of Eu³⁺ concentration on the crystal structure and photoluminescence (PL) properties of Ca_3-x(PO₄)₂:xEu³⁺ (0.06 ≤ x ≤ 0.10) phosphors is systematically investigated using X-ray diffraction (XRD) Rietveld refinement, scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, UV-visible spectroscopy, and PL spectroscopy. The prepared phosphors exhibit a single rhombohedral phase with the space group R3c. The constituent ions occupy various crystallographic sites, including Ca(1–5), Eu(1–3), P(1–3), and O(1–10) sites. Under 397-nm excitation, the emission spectra show distinct emission peaks between 525 and 725 nm, corresponding to the ⁵D₁ → ⁷F_j (j = 1 and 2) and ⁵D₀ → ⁷F_j (j = 1, 2, 3, and 4) transitions of Eu³⁺ ions. The concentration quenching observed in the phosphors is attributed to electric multipolar interactions. Among the prepared phosphors, Ca_2.92(PO₄)₂:0.08Eu³⁺ phosphor shows the highest emission efficiency and excellent color performance. These results demonstrate that Ca_3-x(PO₄)₂:xEu³⁺ phosphors have significant potential as red-emitting materials for white light–emitting diode (WLED) applications.

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高发射效率Ca3(PO4)2:Eu3+荧光粉的晶体结构及光致发光性能

采用x射线衍射（XRD）、Rietveld细化、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）、紫外可见光谱和PL光谱系统地研究了Eu3+浓度对Ca3-x(PO4)2:xEu3+(0.06≤x≤0.10)荧光粉晶体结构和发光性能的影响。所制备的荧光粉表现为具有空间基团R3c的单菱面体相。组成离子占据不同的晶体位置，包括Ca（1-5）、Eu（1-3）、P（1-3）和O（1-10）。在397 nm激发下，发射光谱在525 ~ 725 nm处有明显的发射峰，对应于Eu3+离子的5D1→7Fj （j = 1、2）和5D0→7Fj （j = 1、2、3、4）跃迁。在荧光粉中观察到的浓度猝灭归因于电多极相互作用。在所制备的荧光粉中，Ca2.92(PO4)2:0.08Eu3+荧光粉具有最高的发光效率和优异的显色性能。这些结果表明，Ca3-x(PO4)2:xEu3+荧光粉具有作为白光发光二极管（WLED）应用的红色发光材料的巨大潜力。

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来源期刊

Luminescence 生物-生化与分子生物学

CiteScore

5.10

自引率

13.80%

发文量

248

审稿时长

3.5 months

期刊介绍： Luminescence provides a forum for the publication of original scientific papers, short communications, technical notes and reviews on fundamental and applied aspects of all forms of luminescence, including bioluminescence, chemiluminescence, electrochemiluminescence, sonoluminescence, triboluminescence, fluorescence, time-resolved fluorescence and phosphorescence. Luminescence publishes papers on assays and analytical methods, instrumentation, mechanistic and synthetic studies, basic biology and chemistry. Luminescence also publishes details of forthcoming meetings, information on new products, and book reviews. A special feature of the Journal is surveys of the recent literature on selected topics in luminescence.