Abstract

The alkali metal Na⁺ is commonly applied as a charge compensator to optimize afterglow performance but rarely reported as a structural regulator to modify afterglow behavior in long afterglow glass materials. In this paper, by preparing the Na ⁺-modified Ce-doped boroaluminate glasses under a high-temperature reducing atmosphere, super-five times brighter blue–violet afterglow lasting up to 30 min was obtained. Results show that appropriate Na⁺ doping loosens the glass structure and widens the bandgap, thereby regulating most of the electron capture–release modes. This work provides new insights into the behavior of afterglow enhancement in alkali metal-doped glasses.

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