Terbium-activated gadolinium oxysulfide phosphor with reduced bl

Details Terbium-activated gadolinium oxysulfide phosphor with reduced bl Terbium-activated gadolinium oxysulfide phosphor with reduced bl

1997-09-24

1999-03-09

Bonner, Melissa

Compositions

Inorganic luminescent compositions

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

C09K 1184

Patent

active

058795880

ABSTRACT:
A fluorine-free, terbium-activated gadolinium oxysulfide phosphor with an enhanced green:blue emission ratio is disclosed. The phosphor includes a gadolinium oxysulfide matrix of the nominal formula Gd.sub.2-x O.sub.2 S:xTb, where x is 0.001-0.2. Silicon from metasilicic acid is incorporated in the matrix to enhance the green:blue emission ratio of the phosphor. A method of enhancing the green:blue ratio is also disclosed.

REFERENCES:
patent: 3904546 (1975-09-01), Mattis et al.

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