| abstract |
The invention relates to a novel red emitting material of (Ba 1_x_y_z Sr x Ca y Eu z ) 2 Si 5_a-b Al a N 8-a-4b O a+4b having an average particle size distribution d 50 of > 6 μm, with 0.3 ≤ x ≤ 0.9, 0.01 ≤ y ≤ 0.1, 0.005 ≤ z ≤ 0.04, 0 ≤ a ≤ 0.2 and 0 ≤ b ≤ 0.2. |