A green emitting lanthanum aluminate phosphors activated with manganese and alkali
for plasma display panels (PDP) having an empirical formula:
La2-x-y-B22O36:Mnx.Ay
wherein: A=Li, Na or K; B=Al or Al+Ga; and 0.01x0.1 and
0.01y0.1 is provided. The phosphor has a band emission in green
region, peaking at 515 nm when excited by 147 and 173 nm radiation from Xenon gas
mixture, a uniform particle size distribution (0.01 to 10 microns), which is a
size distribution appropriate for thin phosphor screens required for a variety
of flat panel display and lamp applications. They exhibit high brightness, good
color saturation, good stability and shorter persistence under VUV excitation.
