Multidimensional data-bearing in Eu³⁺/Tb³⁺ doped borosilicate glass phosphors

Transparent glass as an important medium for optical information storage has wide range of applications in the field of optoelectronics, however, achieving higher dimensions of data-bearing is still a challenge for advanced information encryption and safety. Herein, high concentrated rare-earth ions (RE³⁺) are selectively doped in borosilicate glass phosphors, where fluorescence region is expanded by optionally doping configuration of RE³⁺ and colour changes are attained by transforming different wavelength modes. Eu³⁺/Tb³⁺ doped borosilicate glass phosphors show pronounced chromatic diversity and stable luminescent characteristics, and the integration of dynamic photoluminescence and distinct photochromism establishes excellent foundation for info display. In addition, it can be further combined with QR code to implement multimode information recognition, thus realizing info concealment and reproduction. Multidimensional data-bearing is proposed to be built upon the properties of glass phosphors in physical space and the chromaticity change in colour space with variable excitation conditions, which is a promising beginning for applying glass phosphors in the field of multidimensional data storage. © 2025 Elsevier Ltd and Techna Group S.r.l.