Patent ID: 8384285

Claim:
A light emitting device comprising: a phosphor which is a wavelength conversion material, and a semiconductor light emitting device which emits light in a wavelength range of from ultraviolet to visible light, wherein the phosphor comprises a phosphor represented by the formula (I) and comprises a composite oxide comprising divalent and trivalent metal elements, as a host crystal, and at least Ce as an activator element in said host crystal, wherein the phosphor has a maximum emission peak in a wavelength range of from 485 nm to 555 nm in the emission spectrum at room temperature: M 1 a M 2 b M 3 c O d (I), wherein M 1 represents an activator element containing at least Ce; M 2 represents a divalent metal element; M 3 represents a trivalent metal element comprising at least Sc in an amount of 50% or more of the trivalent metal element M 3 ; a is a number within a range of 0.0001≦a≦0.2; b is a number within a range of 0.8≦b≦1.2; c is a number within a range of 1.6≦c≦2.4; and d is a number within a range of 3.2≦d≦4.8.