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采用高温固相法合成了一系列不同浓度Eu3+离子掺杂的Na_3Sc2(VO4)3:Eu3+荧光粉。通过XRD与荧光光谱研究了样品的晶体结构及发光特性。在Na_3Sc2(VO4)3基质中，Eu3+离子的最强激发峰位于350 nm。在350 nm激发下，可以同时观察到VO43-基团位于500 nm的发射带和Eu3+离子来自~5D0→~7FJ(J=0, 1, 2, 3, 4)跃迁的发射峰，其中610 nm (~5D0→~7F2)处的发射峰强度占据主导地位。Eu3+离子的最佳掺杂浓度为0.01,其浓度猝灭机理为电偶极-电偶极作用。研究了样品在80-500 K温度范围内的荧光特性，在低温段，由于较低能态3T1对较高能态3T2的热激发作用使VO43-基团发光强度随温度升高呈现增强趋势并出现蓝移现象。随着温度的持续升高，VO43-基团和Eu3+离子发光强度均出现温度猝灭现象，依据其发光强度比R(Eu3+/VO43-)可以进行温度传感，其相对灵敏度Sr最大值为0.6945%K-1。此外，样品发光颜色也会随温度发生变化，其CIE色度坐标也表现出温度传感性能，其相对灵敏度最大值为0.244%K-1。
Abstract：In this paper, a series of Eu3+ doped Na_3Sc2(VO4)3 phosphors were synthesized using high-temperature solid state method. The crystal structure and luminescence characteristics of the samples were investigated by XRD and fluorescence spectroscopy. In these phosphors, the strongest excitation peak of Eu3+ ions is located at 350 nm. Under 350 nm excitation, both the emission band of the VO43- group centered at 500 nm and the emission peaks of the Eu3+ ion originated from the ~5D0→7FJ(J=0, 1, 2, 3, 4) transitions can be observed simultaneously, and the emission peak at 610 nm(~5D0→7F2) dominants the spectrum. The optimal doping concentration of Eu3+ ions is 0.01, and its concentration quenching mechanism is the electric dipole-dipole interaction. The luminescence properties of the sample in the temperature range of 80-500 K were investigated. In the low-temperature range, due to the thermal feeding effect of the lower energy state 3T1 on the higher energy state 3T2, the luminescence intensity of the VO43- group showed an increasing trend with the rise in temperature and a blue shift phenomenon occurred. Further increasing temperature, the luminescence intensities of both the VO43- group and the Eu3+ ion decrease due to thermal quenching. Temperature sensing can be carried out based on their emission intensity ratio R(Eu3+/VO43-), and the maximum relative sensitivity is 0.6945 %K-1. In addition, the luminescence color of the sample will also change with temperature, and its CIE chromaticity coordinate also shows temperature sensing performance, with a maximum relative sensitivity of 0.244 %K-1.
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基本信息:
中图分类号:TQ422
引用信息:
[1]王晶,宋明君,吴亚红,等.近紫外激活Na_3Sc_2(VO_4)_3:Eu~(3+)荧光粉的发光特性及双模温度传感性能研究[J].潍坊学院学报,2026,26(02):59-69.
2026-04-25
2026-04-25