化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (7) : 184-190. DOI: 10.19817/j.cnki.issn1006-3536.2025.07.044

科学研究

GdVO₄∶Yb³⁺,Ln³⁺(Ln=Er³⁺,Tm³⁺)发光粉的上转换发光性质研究

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Upconversion luminescence properties of GdVO₄∶Yb³⁺,Ln³⁺(Ln=Er³⁺,Tm³⁺)phosphors

Zhang Yanghui, Xu Zhenting, Han Kunbo, Li Yanhong

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Received		Published
2024-07-13		2025-07-20
Issue Date	Revised Date
2025-07-22	2024-07-13

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摘要

采用共沉淀法制备了系列GdVO₄∶Yb³⁺,Er³⁺/Tm³⁺发光粉。通过X射线衍射(XRD)、扫描电子显微镜(SEM)和上转换发射光谱对其结构、形貌和上转换发光性能进行了表征,探究了掺杂浓度和激发功率对其发光性能的影响。结果表明:所制备的发光粉为四方结构的GdVO₄。稀土离子掺杂没有影响晶体结构,高浓度Yb³⁺离子掺杂会引起晶面间距减小。样品形貌呈现稍有团聚的均匀球状颗粒。样品在980nm红外光激发下分别发出来自Er³⁺离子和Tm³⁺离子的绿色和蓝色上转换发光。GdVO₄∶10%Yb³⁺,1%Er³⁺和GdVO₄∶10%Yb³⁺,0.75Tm³⁺发光粉具有较强的发光强度。高浓度稀土离子掺杂由于交叉弛豫过程导致发光效率下降。样品的色坐标显示,改变掺杂稀土离子浓度和激发功率可调控发光粉发光颜色。

Abstract

A series of GdVO₄∶Yb³⁺,Er³⁺/Tm³⁺ phosphors were prepared by co-precipitation method.The stureture,morphology and upconversion luminescence were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM) and upconversion emission spectroscopy.The effects of doping ions concentration and excitation power on the luminescence properties were investigated.The results showed that the synthesized phosphors were GdVO₄ with tetragonal structure.The rare-earth ions doping had no impact on the crystal structure.However,high Yb³⁺ ions doping concentration could cause the decrease of interplanar spacing.The morphologies of the samples exhibited an uniform spherical particles with slight agglomeration.The samples emitted green and blue upconversion luminescence from Er³⁺ and Tm³⁺ ions,respectively,under the excitation of 980nm infrared light.GdVO₄∶10%Yb³⁺,1%Er³⁺ and GdVO₄∶10%Yb³⁺,0.75Tm³⁺ phosphors had strong upconversion luminescence intensity.High rare-earth ions doping concentrations resulted in lower luminescence efficiency due to cross-relaxation processes.The color coordinates of the samples indicated that the color of the luminescent color of the phosphors could be tuned by changing the concentration of doped rare-earth ions and the excitation power.

关键词

沉淀法 / GdVO₄∶Yb³⁺ / Er³⁺/Tm³⁺ / 上转换发光 / 发光粉

Key words

precipitation method / GdVO₄∶Yb³⁺ / Er³⁺/Tm³⁺ / upconversion luminescence / phosphors

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GdVO₄∶Yb³⁺,Ln³⁺(Ln=Er³⁺,Tm³⁺)发光粉的上转换发光性质研究[J]. 化工新型材料, 2025, 53(7): 184-190 DOI:10.19817/j.cnki.issn1006-3536.2025.07.044

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