A new BaB<inf>2</inf>Si<inf>2</inf>O<inf>8</inf>:Eu²/Eu ³, Tb³ phosphor Synthesis and photoluminescence properties

In the present work, we have synthesized maleevite mineral phase BaB 2Si2O8 for the first time, which is isostructural with the pekovite mineral SrB2Si2O 8. In these europium doped host lattices, we observed the partial reduction of Eu3 to Eu2 at high temperature during the synthesis in air. Tb3 co-doping in MB2Si2O 8:0.01(Eu3/Eu2) [M=Sr, Ba] improves the emission properties towards white light. The emission color varies from bluish white to greenish white under UV lamp excitation when the host cation changes from Sr to Ba. © 2010 Elsevier Inc. All rights reserved.