Thermal energy induces long persistent luminescent (LPL) at room temperature, however, the performance is deteriorated for an accelerated release of carriers once these LPL phosphors were employed in an ambient environment with higher temperature such as in vivo imaging, or display in tropical environment. In this work, we report that NaBaScSi₂O₇ possessing stable crystal structure at high temperature, with the introduction of Tb³⁺ ions acting as emitting and traps centers, exhibits an obvious LPL properties above room temperature. The LPL time reaches more than 12 hours at 353 K, thanks to the feasible trap depth ensuring the slowly release of the captured carriers. Outstanding chemical and physical stability guarantees the developed LPL phosphor could be applied for display and biological imaging above room temperature.

热能在室温下会引起长时间的持续发光（LPL），但是，一旦将这些LPL磷光体用于温度较高的周围环境（例如体内成像）或在热带环境中显示，这些性能就会因载体的加速释放而降低。在这项工作中，我们报告了随着Tb ³⁺的引入，NaBaScSi ₂ O ₇在高温下具有稳定的晶体结构。充当发射中心和陷阱中心的离子在室温以上具有明显的LPL特性。LPL时间在353 K时达到12个小时以上，这要归功于可行的陷阱深度，可确保缓慢释放捕获的载流子。出色的化学和物理稳定性保证了开发的LPL荧光粉可用于室温以上的显示和生物成像。