Intense Blue Emission Phosphor BaCa_2MgSi_2O_8: Eu~(2+) for Fluorescent Lamps

摘要

A series of Eu~(2+) doped BaCa_2MgSi_2O_8 phosphors were prepared by a conventional solid state reaction route. Intense blue emission with a maximum at ~430 nm was observed under 254 nm UV light excitation. The oxidation state of Eu is confirmed by EU-L_3 edge XANES. The luminescence spectra of optimal phosphor Ba_(0.97)Eu_(0.03)Ca_2MgSi_2O_8 (BCMSO) was compared with that of commercial blue phosphor BaMgAl_(10)O_(17):Eu~(2+) (BAM). The integrated emission intensity of BCMSO is higher than that of BAM under 254 nm excitation. White-light fluorescent lamps were fabricated using BCMSO and BAM as blue phosphors, respectively. The results indicate that the phosphor BCMSO may be suitable for application in tricolor lamps or other special fluorescent lamps.