Manganese doped zinc silicate luminescent phosphors with III-V o

Details Manganese doped zinc silicate luminescent phosphors with III-V o Manganese doped zinc silicate luminescent phosphors with III-V o

1979-03-05

1980-11-04

Cooper, Jack

Compositions

Inorganic luminescent compositions

Zinc or cadmium containing

2523016P, C09K 1144

Patent

active

042318920

ABSTRACT:
A series of solid solutions in the systems Zn.sub.2 SiO.sub.4 -Zn.sub.2 M.sup.+3.sub..5 M.sup.+5.sub..5 O.sub.4, is synthesized by practice of this disclosure. Solid reaction technique is used where M.sup.+3 and M.sup.+5 signify ions from Groups III and V of the periodic table.
Large increases in the efficiency compared to the prior art P1 phosphor (Zn.sub.2 SiO.sub.4 :Mn) are achieved by substituting various combinations of Group III and V oxides for SiO.sub.2, e.g., Al and P to provide Zn.sub.2-y Mn.sub.y Si.sub.1-2x Al.sub.x P.sub.x O.sub.4. The photoluminescence efficiency of the phosphors of this disclosure exhibit strong dependence on the III-V substitution concentration, x, having highest efficiency for the approximate range of x=0.25% to 1.5%.

REFERENCES:
patent: 2109984 (1938-03-01), Aicher
patent: 2241939 (1941-05-01), Aschermann et al.
patent: 2554999 (1951-05-01), Merrill et al.
patent: 3535267 (1970-10-01), Sarver
patent: 3984587 (1976-10-01), Lipp
Inove, "Chem. Abstracts", vol. 82, 1975, 132611c.

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