Fluorescent substance and light-emitting device employing the same

摘要

The fluorescent substance according to the embodiment is generally represented by (M1-xECx)aSibAlOcNd, and is a kind of the Sr2Si7Al3ON13 phosphors. The substance is in the form of crystals having a mean grain size of 20 to 100 mum, and the aspect ratio thereof is in the range of 2 to 4. This substance emits luminescence having a peak in the wavelength range of 580 to 660 nm when excited by light of 250 to 500 nm. The embodiment also provides a light-emitting device comprising this substance in combination with a light-emitting element and a green light-emitting fluorescent substance.