Manganese doped zinc silicate luminescent phosphors with III-V oxide substitutions

摘要

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. P PLarge 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%.