| 摘要 |
According to one embodiment, the luminescent material emits light having an luminescence peak within a wavelength range of 550 to 590 nm when excited with light having an emission peak in a wavelength range of 250 to 520 nm. The luminescent material has a composition represented by the following formula 1. (Sr1-xEux)aSibAlOcNdformula 1 wherein x, a, b, c and d satisfy following condition: 0<x@0.16, 0.50@a@0.70, 2.0@b@2.5 0.45@c@1.2, 3.5@d@4.5, and 3.6@d/c@8.0.
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