Preparation and fluorescence properties of novel red-emitting Eu3+-activated amorphous alkaline earth silicate phosphors
2010; Elsevier BV; Volume: 130; Issue: 11 Linguagem: Inglês
10.1016/j.jlumin.2010.06.028
ISSN1872-7883
AutoresShinnosuke Kamei, Yoshiyuki Kojima, Nobuyuki Nishimiya,
Tópico(s)Solid-state spectroscopy and crystallography
ResumoThis 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.
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