Dynamic anti-counterfeiting and information encryption of Sr3Y2Ge3O12: Tb3+, Er3+ phosphor via carriers filling and release processes

Stimulated-source-independent persistent luminescence phosphor Sr2Ta2O7:Tb3+, Tm3+ for multi-mode anti-counterfeiting applications

“…Thus, this phosphor with static and dynamic emission possesses excellent anti-counterfeiting and information-hiding functions with UC, DC, PersL, PSL, and several stimulation modes of mechano-luminescence (ML). 21 However, luminescent anti-counterfeiting materials based on PersL phosphors still face the limitation of excitation source-dependent emission color, 22 which weakens the application range of anti-counterfeiting and also increases the difficulty of identification. It is necessary to develop a multiple-mode-stimulated luminescent anti-counterfeiting material based on PersL, in which the emission color does not vary with the excitation source nor with combined dynamic and static emission.…”

Nonstoichiometry-Induced Self-Activated Phosphors for Dynamic Anti-counterfeiting Applications

“…Moreover, time-dependent long persistent luminescence (LPL) − and photostimulated luminescence (PSL) behaviors have been employed to endow a dynamic change of intensity, color, lifetime, etc., achieving improved information encryption levels. Recently, Sr 3 Y 2 Ge 3 O 12 :Tb 3+ , Er 3+ phosphors were successfully synthesized to realize multi-mode dynamic anti-counterfeiting technology, demonstrating time-dependent multi-mode luminescence performance by modulating the charging or readout times of the pumped sources . Wang et al successfully prepared Zn 1+ x Ga 2–2 x Ge x O 4 :Mn phosphors with multi-color dynamic luminescence characteristics by rationally adjusting the defect concentration through the modulation of the ratio of Ga 3+ /Ge 4+ and annealing temperature .…”

Anti‐Counterfeiting Application of Persistent Luminescence Materials and Its Research Progress

“…Compared with the traditional static luminescence anti-counterfeiting technology, dynamic PersL anti-counterfeiting technology is based on luminescent printing and other anti-counterfeiting technologies by making specific luminescent signs, which do not disappear immediately when removed under different stimuli and conditions, but continue to glow for a certain period of time, thus obtaining different display colors or patterns and realizing a dynamic change in the anti-counterfeiting process with the specificity of material design. [44][45][46] On the one hand, the PersL anti-counterfeiting technology can be used alone to achieve dynamic anti-counterfeiting effect. On the other hand, the PersL anti-counterfeiting Long afterglow anti-counterfeiting technology can be combined with other anti-counterfeiting technologies to form a multi-modal and multi-process anti-counterfeiting, which can produce reversible changes in the chemical structure or solid structure according to external stimuli to enhance the anti-counterfeiting effect, thus making the long afterglow materials have a dynamic light-emitting phenomenon by virtue of changes in afterglow intensity and color.…”