Exploring the Sr 2 Ga 2 GeO 7 :Tb 3+ Long Persistent Luminescence Phosphor for Cutting‐Edge Forensic Solutions in Latent Fingerprint Detection and Anticounterfeiting Applications

transition is dominant, producing the green emission of the synthesized phosphor. Concentration quenching is observed, attributed to the radiative reabsorption process. Additionally, the synthesized phosphor demonstrated thermal stability up to 675 K. The kinetic scan and afterglow measurements showed that the persistent luminescence lifetime is ≈7000 s, and the afterglow persistence is up to 100 s. Thermoluminescence measurements revealed that besides the intrinsic defect, doping introduced the interstitial and vacancy defects that contributed to improving the persistent luminescence of the synthesized phosphor. The synthesized phosphor demonstrated a practical application for latent fingerprint detection and anticounterfeiting applications.