A New Blue‐Emitting Phosphor of Ce ³⁺ ‐Activated Fluorosilicate Apatite Ba ₂ Y ₃ [ SiO ₄ ] ₃ F

Abstract

Blue‐emitting phosphor of Ce 3+ ‐activated fluorosilicate apatite Ba 2 Y 3 [ SiO 4 ] 3 F was prepared via conventional solid‐state reaction method. The X‐ray powder diffraction ( XRD ), scanning electron microscopy ( SEM ), photoluminescence ( PL ) excitation and emission spectra, and the decay curves (lifetimes) were applied to characterize the phosphors. The effects of Ce 3+ activator concentration on the luminescence properties were investigated. Ba 2 Y 2.85 Ce 0.15 [ SiO 4 ] 3 F exhibits the brightest blue emission with CIE coordinates of ( x = 0.231, y = 0.301). The crystallographic site of Ce 3+ ions in Ba 2 Y 3 [ SiO 4 ] 3 F lattices was identified. Two kinds of crystallographic Ce 3+ occupying MI and MII sites in Ba 2 Y 3 [ SiO 4 ] 3 F lattices result in two distinct emission centers. The internal PL quantum efficiency, the temperature‐dependent luminescence, and the activation energy of thermal quenching were investigated to evaluate the potential application. This is a new kind of blue‐emitting phosphor based on apatite structure.