利用Ca2+掺杂Zn2GeO4荧光粉的多模温度传感和防伪

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-05-11 DOI:10.1016/j.jlumin.2025.121291

Xincheng Lv , Liangliang Hu , Peng Qiao , Lei Lei , Shiqing Xu , Hongping Ma

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引用次数: 0

摘要

多色材料作为多传感探针具有广阔的应用前景。在这项工作中，使用Ca2+掺杂Zn2GeO4荧光粉来增强比例温度传感和多模式防伪。晶体结构和光致发光分析表明，Ca2+掺入改变了局部晶体环境，增加了空位缺陷。通过分析温度依赖的发射光谱和荧光寿命衰减，我们观察到Zn1.8GeO4:0.2Ca2+样品在303-413 K范围内的最大相对灵敏度为2.22% K−1（荧光强度比）和0.43% K−1（寿命），实现了双模光学测温。此外，制备的标签显示出与激发波长相关的从蓝色到绿色的颜色变化，以及绿色的余辉发光。它们还表现出温度相关的颜色变化，使其适合多模式防伪应用。

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Multi-mode temperature sensing and anti-counterfeiting using Ca2+-doped Zn2GeO4 phosphors

Multicolor materials have promising applications as multi-sensing probes. In this work, Ca²⁺-doped Zn₂GeO₄ phosphor were employed to enhance ratiometric temperature sensing and multi-mode anti-counterfeiting. Crystal structure and photoluminescence analyses revealed that Ca²⁺ incorporation altered the local crystal environment and increased vacancy defects. By analyzing the temperature-dependent emission spectra and fluorescence lifetime decay, we observed that the Zn_1.8GeO₄:0.2Ca²⁺ sample demonstrated a maximum relative sensitivity of 2.22 % K⁻¹ (fluorescence intensity ratio) and 0.43 % K⁻¹ (lifetime) within the 303–413 K range, enabling dual-mode optical thermometry. Moreover, the prepared labels displayed excitation-wavelength-dependent color changes from blue to green, as well as green afterglow luminescence. They also exhibited temperature-dependent color variations, making them suitable for multi-mode anti-counterfeiting applications.

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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.