Preparation and Luminescence Properties of Ba₅Si₈O Long Persistent Phosphors Doped with Rare-Earth Elements.

The phosphors of formula Ba₅Si₈O:Eu,Dy were synthesized and studied in order to improve their properties. Their synthesis conditions were evaluated as a function of precursors, crucible composition, flux agents, dopants and temperatures. The samples were characterised by means of a systematic investigation through elemental, kinetic, mineralogical (both qualitative and quantitative), and morphological analysis.