SILICATE-BASE LUMINESCENT MATERIAL WITH MUTI-EMISSION PEAK, A METHOD OF MANUFACTURING THE SAME AND A LIGHTING APPARATUS USING THE SAME

摘要

A silicate-base luminescent material excitable by the radiation source having wavelengths in the UV-to-blue emitting range and the method of manufacturing the same, especially for white-base light emitting apparatus. The luminescent material has an emission spectrum with at least more than two emission peaks in the 370-760nm. The general constitution of the luminescent material is aAO bA'O cSiO₂:xEu yLn zM dN, wherein A is selected from the group consisting of Sr,Ca, Mg or combinations thereof; A' is selected from the group consisting of Mg, Zn or combinations thereof; Ln is selected from the group consisting of Nd, Dy, Ho, Tm, La, Ce, Er, Pr, Bi, Sm, Sn, Y, Lu, Ga, Sb, Tb, Mn, Pb or combinations thereof; M is selected from one ore more of halogen ion; N is selected from the group consisting of Li⁺, Na⁺, K⁺, Ag⁺ or combinations thereof; and a, b, c, x, y, z, dindicate mole coefficients.