Luminescence of Ce³⁺-doped Sr₁₀(PO₄)₆S phosphors

Abstract

The spectroscopic properties of a series of chalcogenide apatite phosphors, pure and Ce-doped Sr10(PO4)6S, prepared by a high-temperature solid-state reaction technique, were investigated at different temperatures. The pure Sr10(PO4)6S powder shows a broad blue emission peaking at 472 nm (2.63 eV), which results from self-trapped exciton (STE) in the host lattice with the wavelength at 271 nm (4.57 eV). The decay time is about several microseconds. Activator ion Ce3+ shows general f–d transition luminescence with a decay time of more than 20 ns. The activation energy EA for thermal quenching of STE and Ce3+ luminescence was fitted.

Ca5La5(SiO4)3(PO4)3O2:Ce3+,Mn2+: A Color-Tunable Phosphor with Efficient Energy Transfer for White-Light-Emitting Diodes

“…One of the strategies for generating white light from single-composition phosphors is by co-doping sensitizer and activator into a crystalline matrix, using the principle of energy transfer (ET) from sensitizer to activator, such as Eu 2þ to Mn 2þ ion, 6,7 Ce 3þ to Tb 3þ ion, 8,9 Ce 3þ to Eu 2þ ion or Ce 3þ to Mn 2þ ion. 23,24 Apatites crystallize in the hexagonal system with the space group P6 3 /m. The Ce 3þ ion has a larger Stokes shift than that of the other rare earth ions, owing to the extended radial wavefunctions of the 5d state.…”

A New Blue‐Emitting Phosphor of Ce3+‐Activated Fluorosilicate Apatite Ba2Y3[SiO4]3F

“…, the activation energy Δ E was calculated to be 0.238 eV. This is higher than the reported value in Ce 3+ ‐doped apatite such as Sr 10 (PO 4 ) 6 S:Ce 3+ (0.15 eV) …”

Photoluminescence and concentration quenching of NaCa4(BO3)3:Eu3+ phosphor

“…2). These bands may be assigned to self-trapped exciton (STE) in the host lattice [11,17]. In fact, the undoped NaCa 4 (BO 3 ) 3 emits blue light when excited with 254 nm UV lamp, and the emission spectrum is shown in the inset of Fig.…”