Up-conversion charging (UCC) is a promising approach for charging storage phosphors using low-energy excitation light sources. For further understanding the UCC, research on the competition between trapping and detrapping during illumination is essentially required. Here we demonstrate the effect of detrapping on UCC dynamics by a rate equation approach. Accordingly, taking LaMgGa₁₁O₁₉:Pr³⁺ phosphor as an example, we experimentally verified the dependence of illumination dose and duration on the thermoluminescence intensities using 450 nm laser excitation. The present model and experimental approach appear to be transferable to other phosphors. Thus, many existing persistent phosphors can now be revisited, paving the way toward advancing the understanding of UCC.

上转换充电 (UCC) 是一种使用低能激发光源为储能磷光体充电的有前途的方法。为了进一步了解 UCC，本质上需要研究照明期间捕获和解除捕获之间的竞争。在这里，我们通过速率方程方法演示了去陷波对 UCC 动力学的影响。因此，取 LaMgGa ₁₁ O ₁₉ :Pr ³⁺以磷光体为例，我们使用 450 nm 激光激发实验验证了照射剂量和持续时间对热释光强度的依赖性。本模型和实验方法似乎可以转移到其他磷光体。因此，现在可以重新审视许多现有的持久性磷光体，为推进对 UCC 的理解铺平道路。