Photoluminescence properties of Pb₅(PO₄)₃Br:RE (RE = Dy³⁺, Eu³⁺ and Tb³⁺) phosphor synthesised using solid-state...

This study describes the luminous properties of Pb₅(PO₄)₃Br doped with RE³⁺ (RE = Dy³⁺, Eu³⁺ and Tb³⁺) synthesised using the solid-state method. The synthesised phosphor was characterised using Fourier-transform infrared, X-ray diffraction, scanning electron microscopy and photoluminescence measurements. Dy³⁺-doped Pb₅(PO₄)₃Br phosphor exhibited blue and yellow emissions at 480 and 573 nm, respectively, on excitation at 388 nm. Eu³⁺-doped Pb₅(PO₄)₃Br phosphor exhibited orange and red emissions at 591 and 614 nm, respectively, on excitation at λ_ex = 396 nm. Pb₅(PO₄)₃Br:Tb³⁺ phosphor exhibited the strongest green emission at 547 nm on excitation at λ_ex = 380 nm. Additionally, the effect of the concentration of rare-earth ions on the emission intensity of Pb₅(PO₄)₃Br:RE³⁺ (RE³⁺ = Dy³⁺, Eu³⁺ and Tb³⁺) phosphors was investigated.