Stable green phosphor and plasma display panel using the same

Details Stable green phosphor and plasma display panel using the same Stable green phosphor and plasma display panel using the same

2005-03-01

2008-08-12

Koslow, C. Melissa (Department: 1793)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C252S30160F, C252S30140P, C313S582000, C313S584000

Reexamination Certificate

active

07410599

ABSTRACT:
A green emitting lanthanide aluminate phosphors activated with manganese and alkali halide, and blends thereof, for plasma display panels (PDP) and methods for their preparation are provided. The phosphor has an empirical formula:in-line-formulae description="In-line Formulae" end="lead"?Ln2-x-yB22O36:Mnx.Ayin-line-formulae description="In-line Formulae" end="tail"?wherein Ln is a lanthanide metal selected from the group consisting of: La, Y, Gd, Tb, and a combination thereof, wherein La is: 0.57≦La≦1.782; Y is: 0≦Y≦0.19; Gd is: 0.198≦Gd≦0.95; and Tb is: 0≦Tb≦0.19; A is selected from the group consisting of: Li, Na, K and a combination thereof; B is selected from the group consisting of: Al and a combination of Al and Ga; x is 0.01≦x≦0.1; and y is 0.01≦y≦0.1. These phosphors have a band emission in green region, peaking at 515 nm when excited by 147 and 173 nm radiation from Xenon gas mixture of various compositions, a uniform particle size distribution (0.01 to 10 microns) appropriate for thin phosphor screens required for a variety of flat panel display and lamp applications and exhibit high brightness, good color saturation, good stability and shorter persistence under VUV excitation.

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Rao; “TB3+ Activated Green Phosphors for Plasma Display Panel Applications”; ECS; pp. H165-H171.
Sommerkijk et al.; “The Behaviour of Phosphors with Aluminate Host Lattices”; Philips Technical Review; pp. 221-233.

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