A color-tunable persistent luminescence material LiTaO3:Pr3+ for dynamic anti-counterfeiting

Phosphor-in-glass with time-evolving multicolor luminescence for dynamic anticounterfeiting

“…Glass is an excellent optical host matrix owing to its high optical transparency, good chemical and physical stability, easy manipulation and low cost [16]. Integrating optically active particles within a glass matrix can lead to a new functional composite with novel optical properties, potential promoting the development of anticounterfeiting applications [17,18]. Here, we report a novel SrAl 2 O 4 :Eu 2+ ,Dy 3+ / CaAlSiN 3 :Eu 2+ PiG with dynamic multicolor tunable luminescence.…”

Recent advances in the anti-counterfeiting applications of long persistent phosphors

“…Tian et al synthesized a multicolor LiTaO 3 :Pr 3+ PersL phosphor and created multicolor anti-counterfeiting devices using the four typical samples with different doping concentrations of Pr 3+ ions. 35 Based on differentiation of the PersL color and the duration of the four LiTaO 3 :Pr 3+ phosphors, the as-prepared luminous devices demonstrated four different PL hues when exposed to 254 nm UV light. As seen in Fig.…”

Achieving multicolour and multimodal luminescence in Ca3Al2Ge3O12:Bi3+/Ln3+(Ln = Tb, Eu, Sm, and Dy) persistent phosphors for multiple applications

“…[1][2][3][4][5] At the other end of the spectrum in the shorter wavelength UV region (200-400 nm), especially UVB persistent phosphors, which exhibit excellent afterglow properties and can be activated by a wide range of available light sources (e.g., UV lamps) given the advantage of their excellent invisibility (invisible to the naked eye), UV luminescent materials are promising for a wide range of applications in environmental, biological and medical fields, [6][7][8][9][10][11] however, for some important new applications (anti-counterfeiting or information storage), this phosphor has not yet been fully explored. [12][13][14] Counterfeiting phenomena are widespread in all aspects of economics and social life and pose a global security threat to both individuals and society. Accordingly, advanced anticounterfeiting strategies and technologies are in high demand nowadays and thus luminescence anticounterfeiting has received growing attention.…”