The Improvement of Luminescence Degradation of PDP Blue Phosphor with New UV Phosphor

摘要

We found that YAl_3(BO_3)_4:Gd phosphor (YAB:Gd) has a high efficiency of emission at 311 nm under VUV excitation and strong resistant to luminescence degradation caused by heat and VUV irradiation. BaMgAl_(10)O_(17):Eu phosphor (BAM:Eu) is a useful blue phosphor for PDP and fluorescent lamps, but is liable to be degraded by VUV irradiation. In order to prevent this degradation YAB:Gd is mixed with BAM:Eu. In this mixed phosphor, the VUV energy absorbed by the former is efficiently transformed to the blue emission of the latter. Consequently, the luminescence degradation inherent in the blue phosphor is decreased with a small sacrifice of the emission intensity.