Eu3+-activated La7O6(BO3)(PO4)2 phosphors for display lighting, anti-counterfeiting patterning, fingerprint visualization and data storage

Eu 3+ -doped La 7 O 6 (BO 3 )(PO 4 ) 2 phosphors were synthesized using a high-temperature solid-state method. The phosphors with the optimal doping concentration ( x  = 0.4 mol) exhibited strong red emission at 616 nm, demonstrating good thermal stability (70% at 398 K) under 465 nm excitation. Furthermore, tunable correlated color temperature (CCT) was achieved, and the fabricated red LEDs showed satisfactory CCT stability, with standard deviations of 0.00451 and 0.00447 for CIE x and CIE y , respectively. White LEDs made from this phosphor exhibited a good color rendering index R a = 92.6 and a high color temperature CCT = 5612 K. In addition, this phosphor can be used to display invisible anti-counterfeiting patterns, fingerprint visualization, and light-controlled encryption, demonstrating its multifunctional potential in solid-state lighting and security applications.