铽激发CaSnO3的绿色长余辉发光特性研究

摘要

采用高温固相法合成了CaSnO3：Tb3+绿色长余辉发光材料，通过使用X射线衍射仪、荧光光谱仪和微机热释光剂量仪的研究来表征CaSnO3体系发光材料，并对CaSnO3：Tb3+磷光体的物相、发光性能、余辉性能进行了系统的分析，在此基础上，对CaSnO3：Tb3+磷光体添加碱金属元素（Na+、K+）来改善其余辉性能。最后，给出了绿色长余辉材料可能的余辉发光机理。%Green long lasting phosphors of CaSnO3:Tb3+ have been successfully synthesized by solid-state reac⁃tion. X-ray diffraction (XRD), photo luminescence spectroscope (PLS) and thermal luminescence spectroscope (TLS) are employed to characterize the phosphors. Furthermore, the properties of CaSnO3:Tb3+ phosphors, includ⁃ing crystal structure, luminescence properties and the afterglow properties, are also systematically discussed in this paper. To enhance luminescence properties, alkali ions(Na+、K+) has been added to CaSnO3:Tb3+. Moreover, the possible mechanism of the green long lasting phosphorescence is proposed based on the experiment results.