CaMoO_(4):Ho/Yb温度传感器用发光材料的设计及性能研究  

Design and Performance Research of the Luminescent Material of CaMoO_(4):Ho/Yb for Temperature Sensor

作　　者：钟国文[1] 潘盛辉[2] ZHONG Guowen;PAN Shenghui(School of Electrical Engineering,Guangxi Technological College of Machinery and Electricity,Nanning Guangxi 530007,China;School of Automation,Guangxi University of Science and Technology,Liuzhou Guangxi 545006,China)

机构地区：[1]广西机电职业技术学院电气工程学院,广西南宁530007 [2]广西科技大学自动化学院,广西柳州545006

出　　处：《电子器件》2023年第5期1263-1267,共5页Chinese Journal of Electron Devices

基　　金：广西中青年教师基础能力提升项目(2019KY1294)。

摘　　要：基于高温固相合成法,制备出Yb^(3+)不同离子掺杂浓度的CaMoO_(4):1%Ho^(3+)/x%Yb^(3+)系列发光材料,通过X射线衍射分析、上转换荧光光谱,变温荧光光谱等测试方法,对其发光特性及其温度传感特性进行详细表征,并对其发射和感温的机理进行了分析。研究表明:在Yb^(3+)离子掺杂浓度为4%时,所获得的发光强度最大。在980 nm激发光条件下,发射峰值分别为539 nm、664 nm和755 nm,分别对应Ho^(3+)离子的^(5)F_(4)/^(5)S_(2)→^(5)I_(8)能级跃迁、^(5)F_(5)→^(5)I_(8)能级跃迁和^(5)F_(4)/^(5)S_(2)→^(5)I_(7)能级跃迁,通过荧光强度与不同泵浦激发光功率间的拟合关系,获得Ho^(3+)的^(5)F_(4)/^(5)S_(2)包含两光子和三光子两个过程,^(5)F_(5)则是两光子过程。在300 K即室温条件下,获得了最大绝对灵敏度为0.0075 K^(-1),说明了此上转换材料在室温条件下具有较高的测温灵敏性和应用潜力。Based on the high-temperature solid-phase synthesis method,the CaMoO_(4):1%Ho^(3+)/x%Yb^(3+)series luminescent materials with different ion doping concentrations of Yb^(3+)are prepared.Through X-ray diffraction analysis,up-conversion fluorescence spectroscopy,variable temperature fluorescence spectroscopy and other test methods,the luminescence characteristics and temperature sensing characteristics are characterized in detail,and the mechanism of emission and temperature sensing is analyzed.Studies have shown that when the Yb^(3+)ion doping concentration is 4%,the obtained luminescence intensity is the largest.Under the 980 nm excitation light condition,the emission peaks are 539 nm,664 nm and 755 nm,respectively,corresponding to the ^(5)F_(4)/^(5)S_(2)→^(5)I_(8) energy level transition,^(5)F_(5)→^(5)I_(8) energy level transition and ^(5)F_(4)/^(5)S_(2)→^(5)I_(7) energy level transition.According to the fitting relationship between fluorescence intensity and different pump excitation light power,the ^(5)F_(4)/^(5)S_(2) of Ho^(3+)contains two-photon and three-photon processes,and ^(5)F_(5) is a two-photon process.At 300 K or room temperature,the maximum absolute sensitivity obtained is 0.0075 K^(-1),indicating that this up-conversion material has high temperature sensitivity and application potential at room temperature.

关 键 词：发光材料 温度传感器 绝对灵敏度 CaMoO_(4):Ho^(3+)/Yb^(3+) 泵浦功率 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置]