NaGd(MoO_(4))_(2)∶Pr^(3+)荧光粉温度传感特性  

NaGd (MoO_(4))_(2) ∶ Pr^(3+)Phosphor Temperature Sensing Properties

作　　者：李超[1] 孟庆裕[1] Li Chao;Meng Qingyu(Harbin Normal University, Key Laboratory for Photonic and Electronic Bandgap Materials of Ministry of Education)

机构地区：[1]哈尔滨师范大学光电带隙材料教育部重点实验室

出　　处：《哈尔滨师范大学自然科学学报》2021年第6期52-59,共8页Natural Science Journal of Harbin Normal University

基　　金：黑龙江省自然科学基金(LH2019A018)。

摘　　要：使用水热法制备了Pr^(3+)掺杂NaGd(MoO_(4))_(2)荧光粉.通过X射线衍射仪和场发射扫描电子显微镜观察了微观下的样品结构和形貌.通过测量荧光粉室温下的激发光谱和不同温度下的发射光谱,发现Pr^(3+)掺杂的NaGd(MoO_(4))_(2)粉末在276 nm激发下,Pr^(3+)的激发光谱在490 nm (^(3)P_(0)→^(3)H_(4))和651.5 nm (^(3)P_(0)→^(3)F_(2))处发射峰的荧光强度值随温度变化相较于605 nm (^(1)D_(2)→^(3)H_(4))更为明显.计算发现,荧光强度比(FIR)值随着温度的升高而增加,可以用于温度传感.而该实验通过分别比较490 nm (^(3)P_(0)→^(3)H_(4))和651.5 nm (^(3)P_(0)→^(3)F_(2))处发射峰的荧光强度值与605 nm (^(1)D_(2)→^(3)H_(4))处发射峰的荧光强度值的比值,可以得到两组荧光强度比值随温度的变化规律,利用两组数据相互印证能够提高准确性,实现自校准.此外,荧光粉的相对灵敏度的最大值出现在483 K分别为0.95%K^(-1)(605 nm/490 nm)和0.92%K^(-1)(605 nm/651.5 nm),是一种较为优秀的温度传感材料,可以用于表征温度.Pr^(3+) doped NaGd(MoO_(4))_(2) phosphors were prepared by hydrothermal method.The microstructure and morphology of the samples were observed by X-ray diffractometer and field emission scanning electron microscope.By measuring the excitation spectra at room temperature and the emission spectra at different temperatures,it was found that Pr^(3+) doped NaGd(MoO_(4))_(2) powder was excited at 276 nm.The fluorescence intensity of the emission peaks at 490 nm(^(3)P_(0)→^(3)H_(4)) and 651.5 nm(^(3)P_(0)→^(3)F_(2)) varies with temperature more obviously than that at 605 nm(^(1)D_(2)→^(3)H_(4)).It is found that the value of fluorescence intensity ratio(FIR) increases with the increase of temperature,which can be used for temperature sensing.In this experiment,the fluorescence intensity ratio of the emission peak at 490 nm(^(3)PM_(0)→^(3)H_(4)) and 651.5 nm(^(3)P_(0)→^(3)F_(2)) Be compared with the fluorescence intensity ratio at 605 nm(^(1)D_(2)→^(3)H_(4)),and the change rule of the fluorescence intensity ratios of the two groups with temperature can be obtained.Be compared with the fluorescence intensity ratio at 605 nm(^(1)D_(2)→^(3)H_(4)),and the change rule of the fluorescence intensity ratio of the two groups with temperature could be obtained.Mutual verification of the two sets of data can improve the accuracy and realize self-calibration.In addition,the maximum relative sensitivity of phosphor powder appears at 483 K,which is 0.95% K^(-1)(605 nm/490 nm) and 0.92% K^(-1)(605 nm/651.5 nm),respectively.It is an excellent temperature sensing material and can be used to characterize temperature.

关 键 词：Pr^(3+) FIR 相对灵敏度 钼酸盐 

分 类 号：O644.1[理学—物理化学]