Synthesis, crystal structure, and anti-thermal quenching performance of Lu2Sr(1-x)Al4SiO12:xEu2+ phosphors

With high-temperature solid-state reaction method, a series of Lu2Sr(1-x)Al4SiO12:xEu(2+) phosphors have been synthesized. With Rietveld refinement method, the crystal structure of Lu2SrAl4SiO12 has been refined. Under the excitation of the ultraviolet and violet band light, Lu2Sr(1-x)Al4SiO12:xEu(2+) emits the Eu2+ characteristic blue broadband light. The photoluminescence properties of concentration quenching, emission peak shift, reflectance spectra, and luminescence decay have been investigated. With the structure analyses, the corresponding physical mechanisms have been discussed. With the increased temperature, this phosphor shows well thermal stabilities. For the x(Eu) = 0.06, 0.08, and 0.1 phosphors, the strong anti-thermal quenching performance has been observed. The reason for the anti-thermal quenching of this phosphor has been discussed. The trap capture mechanism may be the suitable physical mechanism to explain the anti-thermal quenching of this phosphor. This phosphor shows the potential applications in the white LED lighting fields.

Automated summary

A series of Lu2Sr(1-x)Al4SiO12:xEu(2+) phosphors were successfully synthesized using high-temperature solid-state reaction method. The crystal structure of Lu2SrAl4SiO12 was refined using Rietveld refinement method. The phosphors exhibit blue broadband light emission under excitation of ultraviolet and violet band light. They also demonstrate good thermal stability and anti-thermal quenching properties. The phosphors have potential applications in white LED lighting fields.