Blue Emitting Eu^2+ Activated Aluminate Phosphors with β-Tridymite Type Structure for PDP Application(Special Issue on Electronic Displays)

概要

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For vacuum-UV(VUV)phosphor application such as plasma display panels(PDPs)and mercury free lamps, CaAl_2O_4 : Eu^2+(CA : Eu^2+)showing 440 nm blue emission was examined. A single phase CA : Eu^2+ was obtained by two step firing technique. The photoluminescence(PL)spectrum shows blue shift compared to that of blue-emitting BaMgAl_10O_17 : Eu^2+(BAM : Eu^2+)phosphors. CA : Eu^2+ phosphors with β-tridymite crystal structure show less luminance degradation on baking in comparison to the commercial BAM : Eu^2+ phosphors under VUV excitation. The initial PL intensity of CA : Eu^2+(Eu : 2 mol%)powder phosphor excited by 147 nm light was found to be about 60% of the commercial BAM : Eu^2+ and the luminance of test panel with CA : Eu^2+(Eu : 1 mol%)was 37.4 cd/m^2. The low test panel luminance with CA : Eu^2+ phosphor is partly caused by the poor spread characteristics of the phosphor slurry due to the large particle size distribution. With improvement of luminance efficiency and the powder characteristics, there is a possibility that CA : Eu^2+ phosphors can be applied for PDPs.
社団法人電子情報通信学会の論文
2000-10-25