| 摘要 |
A phosphor which emits light having high brightness, serves as an excellent orange or red phosphor whose light brightness is less decreased when exposed to an excitation source contains a crystal phase having the chemical composition expressed by the general formula [1]: (1−a−b)(Ln′pMII′1−pMIII′MIV′N3).a(MIV′(3n+2)/4NnO).b(AMIV′2N3) [1] wherein Ln′represents a metal element selected from the group consisting of lanthanoids, Mn, and Ti; MnII′represents a divalent metal element except the Ln′element; MIII′represents a trivalent metal element; MIV′represents a tetravalent metal element; A represents a metal element selected from the group consisting of Li, Na, and K; 0<p≰0.2; 0≰a, 0≰b, a+b>0, 0≰n, and 0.002≰(3n+2)a/4≰0.9. |
