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Optical behavior and TL kinetics of Eu~(3+) and Tb~(3+) doped zirconate thermoluminescent phosphors

机译:欧盟〜(3+)和Tb〜(3+)掺杂锆酸盐热荧光荧光体的光学行为和TL动力学

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The influence of Tb3+ and Eu3+ ions on the optical behavior and TL kinetics of the synthesized phosphors were analyzed here. The AZrO(3) (A = Ca, Ba, Sr) phosphors activated with Eu3+ and Tb3+ ions were prepared using solid state reaction technique. The doping concentration of Eu3+ and Tb3+ ions is varied from 0 to 2 mol% for each. The PXRD analysis is done to study various crystallographic aspects of synthesized phosphors. It confirms the crystalline structure, phase purity and homogeneity of synthesized phosphors. The FESEM and TEM analyses show formation of particles with irregular shape and variable dimensions. The agglomeration of these particles is a resultant of prolonged heat treatments involved in solid state reaction method at elevated temperatures. The study of TL spectra of UV and gamma irradiated phosphors set forth their second order kinetics. The electrons were trapped in trap centers with high trap depth and hence high amount of energy (similar to 3 eV) is required to vacate them. The doping of trivalent rare earth impurity ions in the perovskite host lattice leads to formation of these traps centers. With enhanced TL intensity and low fading characteristics, these phosphors are suitable alternatives for TL mapping and sensing applications.
机译:这里分析了Tb3 +和Eu3 +离子对合成磷光体的光学行为和T1动力学的影响。使用固态反应技术制备用EU3 +和Tb3 +离子激活的Azro(3)(a = Ca,Ba,Sr)磷光体。 Eu3 +和Tb3 +离子的掺杂浓度从0〜2摩尔%变化。完成PXRD分析以研究合成磷光体的各种晶体方面。它证实了合成磷光体的结晶结构,相纯度和均匀性。 FeSEM和TEM分析显示具有不规则形状和可变尺寸的颗粒的形成。这些颗粒的附聚是在升高温度下参与固态反应方法的延长热处理的所得到的。紫外线和γ辐照磷光体TL光谱的研究提出了它们的二阶动力学。将电子被捕获在具有高捕集深度的陷阱中心,因此需要高能量(类似于3eV)来腾出它们。钙钛矿宿主晶格中三价稀土杂质离子的掺杂导致这些捕集中心的形成。通过增强的TL强度和低衰落特性,这些磷光体是TL映射和传感应用的合适替代方案。

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