Abstract Adding sodium citric as chelator, NaY(MoO4)2: Pr3+, Tb3+ phosphors were prepared by hydrothermal method. XRD (X-ray diffraction) is employed to confirm the microscopic arrangement of the samples, and the test data show that phosphors are body – centered tetragonal structure. The FE-SEM (Field Emission Scanning Electron Microscope) results indicate that the addition of sodium citrate has a certain effect on the morphology of the samples. It was found from the measured temperature-dependent emission spectrum that Pr3+ and Tb3+ has different quenching trends, and temperature can be characterized by FIR (fluorescence intensity ratio) of Pr3+ ion and Tb3+ ion. Moreover, the experimental results display that with the rise of the molar ratio of Cit3-/Re3+, the sensitivity of phosphors gradually decreases, but the relative sensitivity gradually increases. The relative sensitivity of obtained samples has a higher value of 3.00% K-1 (Cit3-/Re3+= 2). From the CIE chromaticity coordinates, it displays that the luminous color of phosphors changed continuously with the change of temperature.

中文翻译：

---

NaY(MoO4)2: Pr3+、Tb3+荧光粉的制备及温度传感行为

摘要 以柠檬酸钠为螯合剂，采用水热法制备了NaY(MoO4)2:Pr3+、Tb3+荧光粉。XRD（X射线衍射）用于确认样品的微观排列，测试数据表明荧光粉为体心四方结构。FE-SEM（场发射扫描电子显微镜）结果表明柠檬酸钠的加入对样品的形貌有一定的影响。从测得的温度相关发射光谱中发现，Pr3+和Tb3+具有不同的猝灭趋势，温度可以通过Pr3+离子和Tb3+离子的FIR（荧光强度比）表征。此外，实验结果表明，随着 Cit3-/Re3+ 摩尔比的增加，荧光粉的灵敏度逐渐降低，但相对敏感度逐渐增加。所得样品的相对灵敏度较高，为 3.00% K-1 (Cit3-/Re3+= 2)。从CIE色度坐标上可以看出，荧光粉的发光颜色随着温度的变化而不断变化。