Long persistent luminescence properties of NaBaScSi2O7: Tb3+ and it's applications above room temperature

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 h 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.