The fluorescent substance which features that the luminous peak which the fluorescent substance, and the luminous device, the illuminating

摘要

PROBLEM TO BE SOLVED: To provide a deep red phosphor imparting high color rendering properties or a brilliant white phosphor imparting high color rendering properties and to provide a light emitting device emitting visible lights with high luminescence intensity, by combining the phosphors with a stimulation source which emits the light of 350 to 430 nm.;SOLUTION: The phosphor has a crystal phase having chemical composition expressed by general formula [1]. The light emitting device is combined the phosphor and a light emitting source which emits the light of 350 to 430 nm, for irradiation of the light. In the formula, M¹is an element selected from a group comprising monovalent, divalent, trivalent and pentavalent elements, wherein the ratio of divalent elements is ≥80 mol.%, the ratio of sum of Ba, Ca and Sr is ≥40 mol.%, the ratio of sum of Ba and Ca (molar ratio) is less than 0.2, M² is the tetravalent element containing Si and Ge and the sum of the Si and Ge is ≥90 mol.%, Z is a monovalent, divalent elements, H, N or the like elements, for example the phosphor is expressed by Ba_0.935Mg_0.935Eu_0.1Mn_0.03SiO₄.;COPYRIGHT: (C)2005,JPO&NCIPI