核壳结构NaGdF4: Er3+Tm3+/Yb3+@NaYbF4: xYb3+ (x = 25,50)荧光粉的上转换发射特性及温度测量

IF 4.3 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-04-11 DOI:10.1016/j.saa.2025.126223

Li Xuecheng, Hao Haoyue, Li Liang

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引用次数: 0

摘要

本研究研究了核壳结构的NaGdF4: Er3+/Tm3+/Yb3+@NaGdF4: Yb3+荧光粉的上转换发光强度和性质。在NaGdF4: xYb3+ (x = 25,50)壳层覆盖NaGdF4: 0.5Er3+/0.5Tm3+/30Yb3+ (0.5Er/0.5Tm/30Yb)芯层后，荧光粉的发光强度有所提高。增强因子分别为3.97 （x = 25）和1.15 （x = 5）。由于上转换发光峰的增加不同，在NaGdF4: 0.5Er3+/0.5Tm3+/30Yb3+@NaGdF4: 25Yb3+ (0.5Er/0.5Tm/30Yb@25Yb)荧光粉中，发光颜色由蓝绿色变为黄绿色。此外，还测试了0.5Er/0.5Tm/30Yb@25Yb荧光粉的感温性能。基于两种绿色荧光强度比，在303 K下测得最大相对灵敏度Sr为0.013 K−1。根据绿色（540 nm）和近红发射（800 nm）的比值，在403 K处记录到更高的Sr为0.034 K−1。这些发现不仅加深了对核壳结构荧光粉上转换过程的理解，而且促进了稀土离子核壳结构在温度传感和发光显示器中的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Up-conversion emission characteristics and temperature measurement of core-shell structured NaGdF4: Er3+Tm3+/Yb3+@NaYbF4: xYb3+ (x = 25, 50) phosphors

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Up-conversion emission characteristics and temperature measurement of core-shell structured NaGdF4: Er3+Tm3+/Yb3+@NaYbF4: xYb3+ (x = 25, 50) phosphors

In this study, the intensity and properties of up-conversion luminescence in core–shell structured NaGdF₄: Er³⁺/Tm³⁺/Yb³⁺@NaGdF₄: Yb³⁺ phosphors were investigated. After coating the NaGdF₄: 0.5Er³⁺/0.5Tm³⁺/30Yb³⁺ (0.5Er/0.5Tm/30Yb) core with NaGdF₄: xYb³⁺ (x = 25, 50) shells, the luminescence intensity of the phosphors was improved. The enhancement factor reached to 3.97 (x = 25) and 1.15 (x = 5) respectively. Owing to the different increase of up-conversion luminescence peak, the emission color changed from blue-green to yellowish-green in NaGdF₄: 0.5Er³⁺/0.5Tm³⁺/30Yb³⁺@NaGdF₄: 25Yb³⁺ (0.5Er/0.5Tm/30Yb@25Yb) phosphors. Additionally, the temperature sensing properties of the 0.5Er/0.5Tm/30Yb@25Yb phosphors were examined. A maximum relative sensitivity (S_r) of 0.013 K⁻¹ was observed at 303 K based on florescence intensity ratio of two green emission. And a higher S_r of 0.034 K⁻¹ was recorded at 403 K based on the ratio of green (540 nm) and near-red emissions (800 nm). These findings not only deepen the understanding of the up-conversion processes in core–shell structured phosphors but also promote the development of rare-earth ion core–shell structures for applications in temperature sensing and luminescent displays.

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.