Luminescent characteristic of test PDP panel using blue-emitting CaMgSi{sub}2O{sub}6:Eu{sup}(2+) phosphor

摘要

Current blue PDP phosphor BaMgAl{sub}10O{sub}17:Eu{sup}(2+)(BAM) shows serious luminance degradation. Therefore, we examined CaMgSi{sub}2O{sub}6:Eu{sup}(2+)(CMS:Eu{sup}(2+) showing a blue emission as a new phosphor for PDP applications. The comparison of deterioration in fabrication process and driving process for CMS:Eu{sup}(2+) and BAM test panel was performed. Whereas BAM shows about 50% of initial intensity in baking process, CMS:Eu{sup}(2+) keeps initial intensity after baking at 600°C. After 300 hours driving BAM test panel shows a decrease of luminescent intensity to about 60% of initial intensity, while CMS:Eu{sup}(2+) test panel keeps about 90% of initial intensity. We also examined to synthesize (Ca,Sr)MgSi{sub}2O{sub}6:Eu{sup}(2+) to improve the luminance of CMS:Eu{sup}(2+). Peak wavelength shifts toward 444 nm for the sample with 50% Sr versus Ca, resulting in the decrease of luminance.