Color-tunable photoluminescence and persistent luminescence in a single LiYGeO₄:Tb³⁺ phosphor

Abstract Persistent luminescence (PerL) phosphors have been widely applied in many advanced applications the field of emergency lighting, safety signage, and ornaments. Recently, PerL based on germanates attracted great attention owing to their excellent performance. However, design development germanates-based materials with full spectral emissions remain challenging due lack color-tunable PerL, especially blue green regions (400–600 nm). Herein, we develop a new type Tb 3+ -activated LiYGeO 4 phosphor real-time adjusting photoluminescence (PL) color, which can be effectively excited by 254 UV light. Both are realized simultaneously single phosphor. When :Tb doped lower concentrations ions, emit PL PerL. With increasing concentration, colors gradually regulated from green. Besides, exhibits temperature-dependent property, whose also successively tuned various temperature. This stable tunable color property promote as-designed potential anti-counterfeiting display devices.