Oxide fluorescent material and light emitting device

Abstract

To provide an oxide fluorescent material that has a light emission peak wavelength in a wavelength range of from red light to near infrared light. The oxide fluorescent material has a composition encompassed in a compositional formula represented by the following formula (1): (Li1-tM1t)u(Ga1-vM2v)5Ow:Crx,Niy,M3z,  (1) wherein in the formula (1), M1 represents at least one kind of an element selected from the group consisting of Na, K, Rb, and Cs; M2 represents at least one kind of an element selected from the group consisting of B, Al, Sc, In, and a rare earth element; M3 represents at least one kind of an element selected from the group consisting of Si, Ge, Sn, Ti, Zr, Hf, Bi, V, Nb, and Ta; and t, u, v, w, x, y, and z each satisfy 0≤t≤1.0, 0.7≤u≤1.6, 0≤v<1.0, 7.85≤w≤11.5, 0.05≤x≤1.2, 0≤y≤0.5, 0.25<x+y≤1.2, y<x, and 0≤z≤0.5.

Dependencies are inferred from the claim text.