초록 ▼

A series of solid solutions in the systems Zn2SiO4-Zn2M+3.5M+5.5O4, is synthesized by practice of this disclosure. Solid reaction technique is used where M+3 and M+5 signify ions from Groups III and V of the periodic table. Large increases in the efficiency compared to the prior art P1 phosphor (Zn2

A series of solid solutions in the systems Zn2SiO4-Zn2M+3.5M+5.5O4, is synthesized by practice of this disclosure. Solid reaction technique is used where M+3 and M+5 signify ions from Groups III and V of the periodic table. Large increases in the efficiency compared to the prior art P1 phosphor (Zn2 SiO4:Mn) are achieved by substituting various combinations of Group III and V oxides for SiO2, e.g., Al and P to provide Zn2-yMnySi1-2xAlxPxO4. 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%.

대표청구항 ▼

Luminescent composition of a solid solution comprising Zn2-yMnySi1-2xAlxPxO4 having a willemite crystal structure wherein 0y≤0.25 and 0x0.5, wherein x is an amount sufficient to effect a luminescence efficiency that is greater than said composition absent Al and P, and wherein y is an amount suffic

Luminescent composition of a solid solution comprising Zn2-yMnySi1-2xAlxPxO4 having a willemite crystal structure wherein 0y≤0.25 and 0x0.5, wherein x is an amount sufficient to effect a luminescence efficiency that is greater than said composition absent Al and P, and wherein y is an amount sufficient to effect an emission peaked near 5230 A.