摘要
通过水热法制备了Bi^(3+),Sm^(3+)共掺杂的LaVO_(4)荧光粉材料,并通过X射线衍射(XRD)表征了样品结构,得出所制备的样品为单斜项独居石结构.FE-SEM图像显示样品为亚微米级不规则颗粒.实验分析结果表明,所制备的样品中Bi^(3+)的发光有着明显的热猝灭趋势,而Sm^(3+)发光的热猝灭趋势则非常缓慢,这一现象则导致了Sm^(3+)和Bi^(3+)的荧光强度比(FIR)随着温度的升高而增大,可以用来表征温度.利用Sm^(3+)与Bi^(3+)的FIR所表示的相对灵敏度有着较高的数值,其最大值约为2.49%K-1(LaVO_(4):5 mol%Bi^(3+),0.2 mol%Sm^(3+),376 K).此外,实验中样品的发光颜色亦随温度发生了明显的变化,这使得运用发光颜色表征温度成为了一种可能.最终经由温度冲击试验表明,样品还拥有着十分优秀的FIR重复性.故LaVO_(4)∶Bi^(3+),Sm^(3+)材料在光学温度传感这一领域有着广阔且良好的应用期望.
In this study,LaVO_(4) phosphor materials co-doped with Bi^(3+)and Sm^(3+)were prepared by the hydrothermal method,and the sample structure was characterized by X-ray diffraction(XRD).It was concluded that the prepared samples had a monocline monazite structure.The FE-SEM images showed that the samples were sub-micron irregular particles.The experimental analysis results showed that the luminescence of Bi^(3+)in the prepared samples had a distinct thermal quenching tendency,while the thermal quenching tendency of Sm^(3+)luminescence was very slow.This phenomenon led to an increase in the fluorescence intensity ratio(FIR)of Sm^(3+)and Bi^(3+)with the rise of temperature,which could be used to characterize temperature.The relative sensitivities represented by the FIR of Sm^(3+)and Bi^(3+)had relatively high values,with the maximum value being approximately 2.49%K-1(LaVO_(4):5 mol%Bi^(3+),0.2 mol%Sm^(3+),393 K).In addition,the luminescent color of the samples in the experiment also changed significantly with temperature,which made it possible to characterize temperature using luminescent color.Finally,the temperature shock test indicated that the sample still had very excellent FIR repeatability.Therefore,LaVO_(4):Bi^(3+),Sm^(3+)materials had broad and promising application prospects in the field of optical temperature sensing.
作者
庞杰文
孟庆裕
Pang Jiewen;Meng Qingyu(Key Laboratory for Photonic and Electronic Bandgop Materials,Ministry of Education,Harbin Normal University)
出处
《哈尔滨师范大学自然科学学报》
2025年第5期54-63,共10页
Natural Science Journal of Harbin Normal University
关键词
光学温度传感
非热耦合能级
稀土材料
荧光强度比
Optical temperature sensing
Non-thermally coupled energy level
Rare earth materials
Fluorescence intensity ratio
