Sajwan, ShrutiShrutiSajwanSinghal, MalikaMalikaSinghalVishwakarma, Pradeep KumarPradeep KumarVishwakarmaChauhan, NaveenNaveenChauhanSingh, Sunil KumarSunil KumarSingh2025-09-172025-09-172025-07-2510.1021/acsaom.5c001382-s2.0-105014353370https://d8.irins.org/handle/IITG2025/32766Current static luminescent anticounterfeiting techniques exhibit limited security efficacy, highlighting an urgent demand for more advanced anticounterfeiting technologies. In this study, we present a persistent luminescent material, Zn<inf>2.95</inf>Ga<inf>2</inf>SnO<inf>8</inf>:Cr³⁺/Ho³⁺/Yb³⁺, which additionally demonstrates upconversion (UC) emission capabilities. The multifaceted emission characteristics of this material were utilized to create a high-concealment information encryption-decryption label. Our investigation indicates that the persistent luminescence (PersL) is attributable to the presence of suitably positioned traps within the phosphor matrix. Importantly, the phosphor also exhibits near-infrared (NIR) excited PersL, resulting from energy transfer processes between Ho³⁺and Cr³⁺ions. We successfully showcased the potential for dynamic anticounterfeiting and dual-mode information encryption-decryption by integrating this versatile material into anticounterfeiting patterns. The capacity to excite these phosphors using cost-effective UVA flashlights, combined with the visibility of their emissions to the naked eye and standard smartphone cameras, underscores their viability for large-scale applications in anticounterfeiting and secure information technologies.falseanticounterfeiting | information encryption | persistent luminescence materials | traps | upconversion emissionJournal277198551535-154625 July 20251arArticle