Dynamic luminescence materials overcome the disadvantages of traditional static anti-counterfeiting materials that are easy to imitate, but the repeated display of dynamic luminescence is still a challenge. In this work, the dynamic luminescence material Sr₃Ga₄O₉:Sm³⁺ was synthesized. It was found that under 254 nm irradiation, the color of PL gradually changed from purple to pink in tens of seconds. More importantly, the dynamic luminescence intensity and self-recovery performance of the phosphor were improved by doping with Zn²⁺. The experimental results show that this is achieved by Zn²⁺ acting as a new dynamic luminescence center and enhancing the density of shallow traps. In addition, multi-color secondary dynamic luminescence, which is used in the field of anti-counterfeiting, was experimentally demonstrated. This study provides a new perspective on the synergistic enhancement of dynamic luminescence intensity and rapid self-recovery.

中文翻译：

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增强 Zn2+ 共掺杂 Sr3Ga4O9：Sm3+ 的动态发光和自恢复性能


动态发光材料克服了传统静态防伪材料容易模仿的缺点，但动态发光的重复显示仍然是一个挑战。在本工作中，合成了动态发光材料 Sr₃Ga₄O₉：Sm³⁺。结果发现，在 254 nm 照射下，PL 的颜色在数十秒内逐渐由紫色变为粉红色。更重要的是，掺杂 Zn²⁺ 提高了荧光粉的动态发光强度和自恢复性能。实验结果表明，这是通过 Zn²⁺ 作为新的动态发光中心并提高浅陷阱的密度来实现的。此外，还实验演示了用于防伪领域的多色二次动态发光。本研究为动态发光强度的协同增强和快速自我恢复提供了新的视角。