Terbium-activated rare earth oxysulfide phosphor with enhanced g

Details Terbium-activated rare earth oxysulfide phosphor with enhanced g Terbium-activated rare earth oxysulfide phosphor with enhanced g

1997-09-24

1999-03-09

Bonner, Melissa

Compositions

Inorganic luminescent compositions

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

C09K 1184

Patent

active

058795871

ABSTRACT:
A terbium-activated rare earth oxysulfide phosphor with an enhanced green:blue emission ratio is disclosed. The phosphor includes a rare earth oxysulfide matrix of the nominal formula M.sub.2-x O.sub.2 S:xTb, where M is lanthanum, gadolinium, yttrium, scandium, lutetium or their mixtures, and x is 0.001-0.2. Up to 1000 ppm of dysprosium 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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