Blue and red emitting Eu activated CaMgSi/sub 2/O/sub 6/ VUV phosphors

Abstract

CaMgSi/sub 2/O/sub 6/:Eu (CMS:Eu) powder phosphors showing blue and red emissions were examined for vacuum UV (VUV) excitation applications. Nearly single phased CMS powder phosphors with either Eu/sup 2+/ or Eu/sup 3+/ activator can be synthesized using EuF/sub 3/ or Eu/sub 2/O/sub 3/ as source material, respectively. Under VUV excitation, the PL spectra show a good blue emission from Eu/sup 2+/ and a good red emission from Eu/sup 3+/ in the CMS host. At present, the PL intensity of CMS:Eu/sup 2+/ under 147 nm excitation is about 50 % that of BAM:Eu/sup 2+/.