| 摘要 |
The invention provides, amongst others for application in a lighting unit, a phosphor having the formula M1−y−zZzAaBbCcDdEeN6−nOn:ESx,REy (I), with M=selected from the group consisting of divalent Ca, Sr, and Ba; Z=selected from the group consisting of monovalent Na, K, and Rb; B=selected from the group consisting of divalent Mg, Mn, Zn, and Cd; C=selected from the group consisting of trivalent B, Al and Ga; D=selected from the group consisting of tetravalent Si, Ge, Ti, and Hf; A=selected from the group consisting of monovalent Li, and Cu; E=selected for the group consisting of P, V, Nb, and Ta; ES=selected from the group consisting of divalent Eu, Sm and Yb; RE=selected from the group consisting of trivalent Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Tm; 0≦x≦0.2; 0≦y≦0.2; 0<x+y≦0.4; 0≦z<1;x+y+z<1; 0≦n≦0.75; 0≦a≦2 (such as 0≦b≦0.5); 0≦b≦2; 0≦c≦4; 0≦d≦4; 0≦e≦4; a+b=2; c+d+e=4; and a+2b+3c+4d+e+y−z=16−n. |
