Patent ID: 8471459
Filing Date: 2013-06-25
Classification: C09K,H01L,Y10T

Abstract:
1. A fluorescent substance represented by the following formula (1): in which M is Sr; EC is Eu; and x, a, b, c and d are numbers satisfying the conditions of 0<x<0.4, 0.55<a<0.80, 2<b<3, 0<c≦0.6 and 4<d<5, respectively; in the form of crystals whose mean grain size is in the range of 20 to 100 μm and whose aspect ratio is in the range of 2 to 4; and emitting luminescence having a peak in the wavelength range of 580 to 660 nm under excitation by light in the wavelength range of 250 to 500 nm.