Patent ID: 7608200

Claim:
A phosphor comprising a crystal phase having any one chemical composition of the following formulas [1] to [3]: Eu a0 Mn b0 M 10 c0 M 20 d0 M 30 O e0 Z 0 f0 [1] wherein M 10 is a divalent element containing 85 mol % or more of at least one element selected from the group consisting of Ba, Ca and Sr, in which the ratio (molar ratio) of Ca to the sum of Ba and Ca is from 0.1 to 0.9; M 20 represents at least one element selected from the group consisting of a monovalent, trivalent and pentavalent elements; M 30 represents a group of tetravalent elements containing Si and Ge in a total amount of 90 mol % or more; Z 0 is at least one element selected from the group consisting of a minus monovalent and minus divalent elements, H and N; and a0 is a number satisfying 0.001a0≦0.6, b0 is a number satisfying 0≦b0≦0.7, c0 and d0 are numbers satisfying 0≦d0/(c0+d0)0.2, a0, b0 c0 and d0 are numbers satisfying 1.8≦(a0+b0+c0+d0)≦2.2, and e0 and f0 are numbers satisfying 0≦f0/(e0+f0)≦0.035 and 3.6≦(e0+f0)≦4.4: Eu a1 Mn b1 Mg cl M 11 d1 M 21 O e1 Z 1 f1 [2 ] wherein M 11 represents at least one element selected from the group consisting of a monovalent element, a divalent element except Eu, Mn and Mg, a trivalent element and a pentavalent element, in which the proportion of the divalent element is 80 mol % or more, the proportion of the sum of Ba, Ca and Sr is 40mol % or more, and the ratio (molar ratio) of Ca to the sum of Ba and Ca is from 0.2 to 0.9; M 21 represents a group of tetravalent elements containing Si and Ge in a total amount of 90 mol % or more; Z 1 is at least one element selected from the group consisting of a minus monovalent and minus divalent elements, H and N; and a1 is a number satisfying 0.001≦a1≦0.8, b1 is a number satisfying 0<b1≦0.8, c1 and d1 are numbers satisfying 0<c1/(c1+d1)≦0.2, a1 b1 c1 and d1 are numbers satisfying 1.8≦(a1+b1+c1+d1)≦2.2, and c1 and f1 are numbers satisfying 0≦f1/(e1+f1)≦0.035 and 3.6≦(e1+f1)≦4.4: Eu a2 Mn b2 Mg c2 M 12 d2 M 22 O e2 Z 2 f2 [3] wherein M 12 represents at least one element selected from the group consisting of a monovalent element, a divalent element except Eu, Mn and Mg, a trivalent element and a pentavalent element, in which the proportion of the divalent element is 80 mol % or more, the proportion of the sum of Ba, Ca and Sr is 40mol % or more, and the ratio (molar ratio) of Ca to the sum of Ba and Ca is less than 0.2; M 22 represents a group of tetravalent elements containing Si and Ge in a total amount of 90 mol % or more; Z 2 is at least one element selected from the group consisting of a minus monovalent and minus divalent elements, H and N; and a2 is a number satisfying 0.0003≦a2≦0.8, b2 is a number satisfying 0<b2≦0.8, c2 and d2 are numbers satisfying 0<c2/(c2+d2)≦0.2 or 0.3≦c2/(c2+d2)≦0.8, a2, b2 c2 and d2 are numbers satisfying 1.8≦(a2+b2+c2+d2)≦2.2, and e2 and f2 are numbers satisfying 0≦f2/(e2+f2)≦0.035 and 3.6≦(e2+f2)≦4.4, wherein the phosphor emits red or white light.