Abstract Trap filling studies of persistent phosphors using visible-light excitation have important implications on both fundamental luminescence research and practical applications. We report here an up-conversion charging (UCC) design of Gd3Ga5O12:Pr3+ persistent phosphor upon excitation with blue lasers. As an example, long-lasting emission from Pr3+ has been achieved in the phosphor after the traps are filled by subsequently absorbing two 450 nm excitation photons from a blue diode laser. Spectroscopic investigations reveal that the composition of UCC intermediate state is predominantly that of 3P0 state of Pr3+ in the phosphor. Our work provides a major step toward developing the UCC design, which enables new properties of persistent luminescence to be discovered and new applications of persistent phosphors developed.

中文翻译：

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使用蓝色激光为 Gd3Ga5O12:Pr3+ 持久荧光粉充电

摘要 利用可见光激发对持久性磷光体的陷阱填充研究对基础发光研究和实际应用具有重要意义。我们在此报告了 Gd3Ga5O12:Pr3+ 持久性磷光体在用蓝​​色激光激发后的上转换充电 (UCC) 设计。例如，在通过随后吸收来自蓝色二极管激光器的两个 450 nm 激发光子来填充陷阱后，已经在磷光体中实现了来自 Pr3+ 的持久发射。光谱研究表明，UCC 中间态的组成主要是磷光体中 Pr3+ 的 3P0 态。我们的工作为开发 UCC 设计迈出了重要一步，它能够发现持久发光的新特性并开发持久荧光粉的新应用。