Synthesis and characterization of Eu²⁺ doped Ba₂Al₂SiO₇ green phosphors with excellent luminescence properties

Eu²⁺ doped green luminescent phosphors were synthesized by high temperature solid phase method using Ba₂Al₂SiO₇ (BASO)as raw material. Through the study of phase structure, SEM image, fluorescence properties, concentration quenching mechanism, fluorescence decay curve and CIE chrominance coordinates, the results show that a series of green phosphors with good luminescence and consistent matter have been successfully obtained. Under excitation at 351 nm, the phosphors exhibited asymmetric broad green luminescence with the highest peak at 503 nm attributed to the 5d–4f transitions of Eu²⁺. The optimized sample of Ba₂Al₂SiO₇:Eu²⁺ exhibited a lifetime of 693 ns, and the calculated CIE coordinates were (0.136, 0.4844), indicating green luminescence. The above-mentioned properties suggest the potential application prospects of green-emitting Ba₂Al₂SiO₇:Eu²⁺ phosphors in white light-emitting diodes (WLEDs).