基于 Bi/Eu 共激活 BaYSiO 荧光粉的双发射温度依赖材料，具有多色防伪性能。

Dual-emitting temperature dependent material based on Bi/Eu co-activated BaYSiO phosphor with multicolor anti-counterfeiting.

机构信息

Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province, Institute of Optoelectronic Materials and Devices, China Jiliang University, Hangzhou 310018, People's Republic of China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Sep 5;297:122754. doi: 10.1016/j.saa.2023.122754. Epub 2023 Apr 17.

DOI:10.1016/j.saa.2023.122754

PMID:37087812

Abstract

Bi, Eu co-doped BaYSiO phosphors with multi-color luminescence properties were prepared by high temperature solid state method. The structure, luminescent properties and temperature characteristics were studied by X-ray diffraction, scanning electron microscope, fluorescence spectrum and temperature-dependence of emission spectrum. BaYSiO: Bi, Eu phosphors can emit color from cyan to red when the excitation wavelength was changed from 340 nm to 390 nm, which is attributed to that there are two Bi ion emission centers, and their emission intensity will change with the change of excitation wavelength. Moreover, the emission of the phosphor has good temperature sensing characteristics, based on the fluorescence intensity ratio of the two blue emission bands of Bi and the red emission peak of Eu, a multimode thermometer with high temperature sensitivity was constructed. At the same time, based on the dynamic luminescence characteristics of the phosphor, the dynamic anti-counterfeiting experiments are designed. Therefore, the results show that the material has a bright prospect in the field of temperature sensing and anti-counterfeiting.

摘要

采用高温固相法制备了具有多色发光性能的 Bi、Eu 共掺杂 BaYSiO 荧光粉。通过 X 射线衍射、扫描电子显微镜、荧光光谱和发射光谱的温度依赖性研究了其结构、发光性能和温度特性。当激发波长从 340nm 变化到 390nm 时，BaYSiO:Bi、Eu 荧光粉可以发出从青色到红色的颜色，这归因于存在两个 Bi 离子发射中心，它们的发射强度会随激发波长的变化而变化。此外，该荧光粉的发射具有良好的温度传感特性，基于 Bi 的两个蓝色发射带和 Eu 的红色发射峰的荧光强度比，构建了一种具有高温度灵敏度的多模式温度计。同时，基于该荧光粉的动态发光特性，设计了动态防伪实验。因此，结果表明该材料在温度传感和防伪领域具有广阔的前景。