Europium and samarium activated rare earth oxysulfide phosphor

Details Europium and samarium activated rare earth oxysulfide phosphor Europium and samarium activated rare earth oxysulfide phosphor

1975-12-18

1977-11-08

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

313468, C09K 1146

Patent

active

040575071

ABSTRACT:
Rare earth oxysulfide phosphors consisting essentially of a compound of a general formula, {(Y.sub.u Gd.sub.1-u).sub.1-x-y-z Eu.sub.x Sm.sub.y (Tb.sub.1-p, Pr.sub.p).sub.z}.sub.2 .sup.. O.sub.2 S, wherein 0 .ltoreq. z .ltoreq. 1 .times. 10.sup.-4, 0 .ltoreq. p .ltoreq. 1, 0 .ltoreq. u .ltoreq. 1, and x and y satisfy the area B, defined by a, b, c and d of FIG. 5.
These phosphors are well adapted for use in a color television picture tube.

REFERENCES:
patent: 2462547 (1949-02-01), Pitha et al.
patent: 2522074 (1950-09-01), Urbach
patent: 2527365 (1950-10-01), Leverenz
patent: 3418246 (1968-12-01), Royce
patent: 3655577 (1972-04-01), Kano et al.
patent: 3706666 (1972-12-01), Schvil
patent: 3868533 (1975-02-01), Schvil

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