| abstract |
The present invention relates to: an (Sr, Ca)AlSiN 3 -based nitride phosphor which is capable of emitting red light with high luminance; and a light emitting device which has achieved excellent color rendering properties and luminous efficiency by using this phosphor.nA phosphor according to the present invention is characterized by being represented by general formula M1 a M2 b M3 c M4 d N e O f , wherein: M1 represents one or more elements selected from among Eu and Ce; M2 represents two or more elements selected from among Mg, Ca, Sr, Ba and Zn, while essentially including Ca and Sr; M3 represents one or more elements selected from among Al, Ga, In and Sc; M4 represents one or more elements selected from among Si, Ge, Sn, Ti, Zr and Hf, while essentially including Si; N represents nitrogen; O represents oxygen; and a-f satisfy 0.00001 ≤ a ≤ 0.15, a + b = 1, 0.5 ≤ c ≤ 1.5, 0.5 ≤ d ≤ 1.5, c + d = 2, 2.5 ≤ e ≤ 3.0 and 0 ≤ f ≤ 0.5. This phosphor is also characterized in that the half-value width of the emission spectrum thereof when excited by light having a wavelength of 455 nm is from 72 nm to 86 nm (inclusive). |