| 摘要 |
Provided is a chemically and thermally stable phosphor having different light-emitting characteristics than a conventional phosphor and having high light-emitting intensity even when combined with an LED of 410 nm or lower. The phosphor comprises an inorganic compound in which an inorganic crystal including A element, D element, X element (A is one or more elements selected from Mg, Ca, Sr, and Ba; D is one or more elements selected from Si, Ge, Sn, Ti, Zr, and Hf; and X is one or more elements selected from O, N, and F), and, if necessary, E element (where E is one or more elements selected from B, Al, Ga, In, Sc, Y, and La) includes Li element and M element (where M is one or more elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb). |
| 主权项 |
1. A phosphor comprising an inorganic compound in which an inorganic crystal including at least an A element, a D element, and an X element (where A is one or two or more elements selected from the group consisting of Mg, Ca, Sr, and Ba; D is one or two or more elements selected from the group consisting of Si, Ge, Sn, Ti, Zr, and Hf; and X is one or two or more elements selected from the group consisting of O, N, and F), further, when necessary, an E element (where E is one or two or more elements selected from the group consisting of B, Al, Ga, In, Sc, Y, and La), and comprising any of (1) a crystal represented by A1 (D, E) 7X10; (2) a Sr1Si7N10 crystal or a crystal having a same crystal structure as the Sr1Si7N10 crystal; or (3) a Ba1Si7N10 crystal or a crystal having a same crystal structure as the Ba1Si7N10 crystal, and comprising a Li element and an M element (where M is one or two or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb,)
wherein the inorganic crystal is represented by a composition formula LcMdAeDfEgXh (here, in the formula, c+d+e+f+g+h=1, L is the Li element) and parameters c, d, e, f, g, and h satisfy all conditions
0.001≦c≦0.7,0.00001≦d≦0.05,0.01≦e≦0.1,0.1≦f≦0.4,0≦g≦0.1, and0.15≦h≦0.65, wherein the inorganic compound emits white color fluorescence upon irradiation by an excitation source. |
