A bluish green barium aluminate phosphor for PDP application

Abstract

A bluish green light-emitting phosphor, Eu 2+-doped barium aluminate (BaAl 2O 4:Eu 2+), for plasma display panel (PDP) application was developed. X-ray diffraction (XRD) patterns disclosed that the phosphor annealed at 1300 °C for 5 h was a pure BaAl 2O 4 phase. Field emission scanning electron microscopy (FE-SEM) image showed the particle size of the phosphor was less than 2 μm. The phosphor shows strong and broad bluish green emission under vacuum ultraviolet (VUV) light excitation. After baking at 400–600 °C and irradiation with VUV light for 300 h, the phosphor still keeps excellent VUV luminescence properties, exhibiting good stability against high temperature baking and VUV irradiation. The decay time was short as 0.721 μs and the quantum yield was high to 0.54 ± 0.02 under near ultraviolet band. All the characteristics indicated that BaAl 2O 4:Eu 2+ would be a potential phosphor for PDP application.