| abstract |
There is provided an oxynitride-based phosphor comprising a β-type Si 3 N 4 crystal structure and represented by a compositional formula of Si 6−x Al x O x N 8−x :Eu y (0<x≦0.3, 0.001≦y≦0.03), the oxynitride-based phosphor having a form of a secondary particle comprising a plurality of primary particles bonded to each other, the plurality of primary particles having pillar shapes. |