NaGd(MoO_(4))_(2)∶Tb^(3+)荧光粉的温度及浓度依赖发光与荧光动力学温度传感  

Temperature-and Concentration-dependent Luminescence and Fluorescence Dynamic Temperature Sensing of NaGd(MoO_(4))_(2)∶Tb^(3+)Phosphors

作　　者：白海斌 陈昕 沙雪竹 高端 张映辉 张翔清 陈宝玖 BAI Haibin;CHEN Xin;SHA Xuezhu;GAO Duan;ZHANG Yinghui;ZHANG Xiangqing;CHEN Baojiu(College of Science,Dalian Maritime University,Dalian 116206,China)

机构地区：[1]大连海事大学理学院,辽宁大连116026

出　　处：《发光学报》2023年第10期1770-1778,共9页Chinese Journal of Luminescence

基　　金：国家自然科学基金(11774042,52071048)。

摘　　要：采用高温固相法制备了不同Tb^(3+)掺杂浓度的NaGd(MoO_(4))_(2)∶Tb^(3+)荧光粉,XRD结果证实所制得样品为纯相。利用荧光光谱测量对该荧光粉的发光浓度猝灭进行了分析,证明荧光浓度猝灭是由Tb^(3+)离子间的交换相互作用所导致,并符合浓度猝灭的Ozawa模型。采用Auzel提出的自产生猝灭模型对Tb^(3+)的5D4能级荧光动力学进行了分析,结果表明该模型能够很好地解释荧光寿命对浓度的依赖关系。研究了Tb^(3+)的^(5)D_(4)能级的发光强度和荧光寿命对样品温度的依赖关系,提出了利用荧光寿命进行温度传感的方法,并对温度传感的绝对和相对灵敏度进行了分析。NaGd(MoO_(4))_(2)∶Tb^(3+)phosphors with different Tb^(3+)concentrations were prepared by a high-temperature solid-state reaction method.The crystal structure analysis by means of X-ray diffraction(XRD)revealed that the samples prepared were pure-phased.Fluorescence spectroscopy measurements were utilized to investigate the phosphor􀆳s fluorescence quenching,and the results indicated that the fluorescence concentration quenching resulted from exchange interactions between Tb^(3+)ions,and the Ozawa model held for the fluorescence quenching process.The selfgenerated quenching model proposed by Auzel was used to analyze the ^(5)D_(4) level fluorescence dynamics of Tb^(3+),and it was found that the Auzel model can well explain the concentration dependence of fluorescence lifetime.The dependences of the luminescence intensity and lifetime of the 5D4 level of Tb^(3+)on the sample temperature were investigated.A method for temperature sensing using the fluorescence lifetime was proposed,and the absolute and relative sensitivities of temperature sensing were analyzed.

关 键 词：高温固相法 浓度猝灭 荧光衰减 热猝灭 温度传感 

分 类 号：O482.31[理学—固体物理]