Preparation of a Sr_2-xEu_xSi₅N₈ Phosphor Using an Ion Transporter

Abstract

We synthesized a single-phase Sr 2-x Eu x Si 5 N 8 phosphor using an ion transporter, Sr 3-x Eu x (PO 4 ) 2 , under atmospheric condition. This is a simple yet efficient synthetic route to the Sr 2-x Eu x Si 5 N 8 phosphor. The quantum efficiency of the phosphor is 90.7%, and the absorption ratio of the excitation wavelength at 450 nm is 88.3%, even though the inexpensive and commercially available raw materials are used without any pretreatment and are easy to handle in a normal atmosphere including oxygen and moisture. We believe that this approach can be used to prepare other nitride-based phosphors, whose synthesis is currently challenging.

Synthesis, Crystal Structure and Photoluminescence of a Gd5Si3O12N:Eu2+Green Emitting Phosphor

“…Currently, nitridosilicate and oxonitridosilicate phosphors have been extensively developed due to their important applications in WLEDs. [1][2][3] In their structures, the nitrogen of SiN 4 tetrahedra can be partially replaced by oxygen to form Si[O/N] 4 tetrahedra. SiN 4 or Si[O/N] 4 units are stacked together by sharing their corners or edges to form condensed frameworks.…”