Luminescence and luminescence quenching of Sr3Lu2(Si3O9)2:Ce3+ phosphors

Abstract A series of near-UV to blue emitting Sr 3 Lu 2 (Si 3 O 9 ) 2 :Ce 3+ phosphors were prepared by a solid state reaction. The optical properties of synthesized phosphors were investigated as a function of Ce 3+ concentration and temperature. These luminescent materials strongly absorb UV radiation shorter than 360 nm. The optimal Ce 3+ concentration was 0.1% (external quantum efficiency ca. 45%). Temperature dependent measurements showed that Sr 3 Lu 2 (Si 3 O 9 ) 2 :Ce 3+ phosphors possess good thermal stability and loses only about 40% to 50% of initial intensity in the temperature range of 77–500 K depending on activator concentration.