| abstract |
(57) [Summary]nPROBLEM TO BE SOLVED: To improve red light efficiency when excited by long wavelength ultraviolet light. La that can be obtained Two O Two S: Eu, Sm phosphor (red Color light-emitting phosphor) and its temperature characteristics There is a need to improve.nSOLUTION: A red light emitting phosphor is (La 1-xy Eu x Sm y ) Two O Two S ・ mM Two O Three (M is selected from Ga and In At least one metal element, 0.01 ≦ x ≦ 0.15, 0.00005 ≦ has a composition represented by y ≦ 0.05, 0.00001 ≦ m ≦ 0.001) Trivalent europium and samarium activated lanthanum oxysulfide It consists of a tan phosphor. The light-emitting device is the red-emitting fluorescent light described above. Containing the body and excited by the ultraviolet light from the light source 11 A light emitting section (16) for emitting visible light is provided. |