| abstract |
A white LED light emitting device having high color rendering efficiency and wide color gamut efficiency and a red light emitting phosphor capable of producing the white LED light emitting device. A red light emitting phosphor according to an embodiment of the present invention has the following general formula (1): (M 1-x EC x ) a M 1 b AlO c N d (1) It is characterized by having. Wherein M is an element selected from Group IA elements, Group IIA elements, Group IIIA elements, Group IIIB elements, rare earth elements, and Group IVA elements, and EC is Eu, Ce, Mn, Tb, Yb, Dy, An element selected from Sm, Tm, Pr, Nd, Pm, Ho, Er, Cr, Sn, Cu, Zn, As, Ag, Cd, Sb, Au, Hg, Tl, Pb, Bi, and Fe; The element M 1 is different from the element M, is selected from a tetravalent element group, and 0 <x <0.2, 0.55 <a <0.80, 2.10 <b <3.90, 0 <c ≦ 0.25 and 4 <d <5, and this phosphor emits light having a peak between wavelengths 620 to 670 nm when excited with light having a wavelength of 250 to 500 nm. [Selection figure] None |