Facilitating cryogenic blue persistent luminescence in a glassy matrix

. X-ray irradiation markedly enhanced the blue PersL attributes and storage efficiency of the glass within the cryogenic temperature range (-125 °C to 0 °C). Therefore, the exceptional blue PersL properties, wide operational temperature range, and robust energy storage efficiency of the glass under X-ray excitation make it an optimal candidate for implementation in photonic data storage, ionizing radiation detection, and cryogenic safety signage applications. This study not only successfully develops a blue PersL glass matrix but also elucidates the PersL mechanism at cryogenic temperatures, providing an example for the design of other low-temperature PersL materials.