Preparation and fluorescence properties of novel red-emitting Eu3+-activated amorphous alkaline earth silicate phosphors

This study reports the synthesis of novel red-emitting Eu3+-activated amorphous alkaline earth silicate phosphors with high emission intensities. Eu3+-activated barium (strontium) silicate hydrate phosphors were synthesized using a liquid phase reaction and then heated at 850 °C for 0.5 h to form amorphous barium (strontium) silicate phosphors. These amorphous phosphors emitted in the red region following near-UV (395 nm) irradiation. The internal quantum efficiencies of the Eu3+-activated amorphous barium silicate phosphor and strontium silicate phosphor were 56% and 60%, respectively, even though these phosphors were in the amorphous state.