Super-bright and Short-lived photoluminescence of Textured Zn_2SiO_4:Mn~(2+) Phosphor Film on Quartz Glass

摘要

Green-emissive textured Zn_2SiO_4:Mn~(2+) phosphor film was fabricated by a thermal diffusion of ZnO:Mn on quartz glass. The characterization has been performed in terms of Mn~(2+) ions concentration (Mn/Zn=1～9 mol %). As an increase of Mn~(2+) ions concentration in the Zn_2SiO_4:Mn~(2+) phosphor film, the emission peak was red shifted from 519 nm to 526 nm, and the decay time to 10% of the maximum intensity was shorter from 20 ms to 0.5 ms. All annealed Zn_2SiO_4:Mn~(2+) phosphor films became textured along some hexagonal directions on the amorphous quartz glass. The brightest Zn_2SiO_4:Mn~(2+) film at optimal Mn~(2+) concentration of 5 % showed the photoluminescence brightness of 65 % and the shortened decay time of 4.4 ms in comparison with a commercially Zn_2SiO_4:Mn~(2+) powder phosphor screen. The excellencies can be attributed to a unique textured structure.