A highly efficient warm white light-emitting Eu2+-activated silicate host: another striking application of mesoporous silica

This study outlines a novel approach to the synthesis of an efficient yellow-emitting Sr0.975Ca0.975Eu0.05SiO4 phosphor with the adequate red spectral components. This was achieved by the use of a well-known silicate source, mesoporous silica. The findings showed that the synthesized phosphor gave a broad emission from blue to red, along with a stable emission color till 450 K and an emission decay time of 1 mu s. When the phosphor was fabricated using UV (400 nm) and blue LED (450 nm) chips, it promisingly generated warm white light at a color temperature < 4000 K and a color rendering index > 80.