Light emitting device

A device comprising:

• a board;
• a light emitting element mounted on the board;
• a red fluorescent layer formed on the light emitting element, the red fluorescent layer including a first red phosphor having a composition expressed by equation (1) and a second red phosphor having a composition expressed by equation (2), the first red phosphor and the second red phosphor being dispersed in a resin;
• and
• a green fluorescent layer formed on the red fluorescent layer, the green fluorescent layer including a green phosphor dispersed in a resin, the green phosphor having a composition expressed by equation (3),
• (Ca1-x1Eux1)a1AlSib1Oc1Nd1:Eu (1)
• (In the equation (1), x1, a1, b1, c1 and d1 satisfy the following relationship:
• 0<x1<0.03, 0.90<a1<1.1, 0.90<b1<1.1, 0.20<c1<0.45, 2.40<d1≦3.00)
• (Sr1-x2Eux2)a2Sib2AlOc2Nd2 (2)
• (In the equation (2), x2, a2, b2, c2, and d2 satisfy the following relationship:
• 0<x2<1, 0.55<a2<0.95, 2.0<b2<3.9, 0<c2<0.6, 4<d2<5.7)
• (Sr1-xEux)3-ySi13-zAl3+zO2+uN21-w (3)
• (In the equation (3), x, y, z, u, and w satisfy the
• following relationship:
• 0<x<1, −0.1<y<0.3, −3<z1, −3<u−w≦1.5).

A light emitting device comprising:

• a board;
• a light emitting element mounted on the board;
• a first red fluorescent layer formed on the light emitting element, the first red fluorescent layer including a first red phosphor dispersed in a resin, the first red phosphor having a composition expressed by equation (1);
• a second red fluorescent layer formed on the first red fluorescent layer, the second red fluorescent layer including a second red phosphor dispersed in a resin, the second red phosphor having a composition expressed by equation (2);
• and
• a green fluorescent layer formed on the second red fluorescent layer, the green fluorescent layer including a green phosphor dispersed in a resin, the green phosphor having a composition expressed by equation (3),
• (Ca1-x1Eux1)a1AlSib1Oc1Nd1:Eu (1)
• (In the equation (1), x1, a1, b1, c1 and d1 satisfy the
• following relationship:
• 0<x1<0.03, 0.90<a1<1.1, 0.90<b1<1.1, 0.20<c1<0.45, 2.40<d1≦3.00)
• (Sr1-x2Eux2)a2Sib2AlOc2Nd2 (2)
• (In the equation (2), x2, a2, b2, c2, and d2 satisfy the following relationship:
• 0<x2<1, 0.55<a2<0.95, 2.0<b2<3.9, 0<c2<0.6, 4<d2<5.7)
• (Sr1-xEux)3-ySi13-zAl3+zO2+uN21-w (3)
• (In the equation (3), x, y, z, u, and w satisfy the
• following relationship:
• 0<x<1, −0.1<y<0.3, −3<z≦1, −3<u−w≦1.5).