| abstract |
A phosphor capable of increasing the brightness of a white light emitting diode (white LED) using a blue light emitting diode (blue LED) or an ultraviolet light emitting diode (ultraviolet LED) as a light source or a white EL using an inorganic EL as a light source, and the phosphor Of white light emitting devices using The phosphor comprises the following first and second phosphors. The first phosphor is (M1 (x1), M2 (x2)) (M3) 12 (O, N) 16 (where M1 is Li, Mg, Ca, Sr, Ba, Y, La, Gd, Lu A metal element selected from the group consisting of M2, M2 is a metal element selected from the group consisting of Ce, Pr, Eu, Tb, Yb, and Er, and M3 is made of Si, Ge, Sn, B, Al, Ga, In. The metal elements selected from the group, x1 and x2, are both 0 <x1, x2 <2 and 0 <x1 + x2 <2. The second phosphor is an α sialon group phosphor containing 5% by mass or less of one or two elements of Sr and Ba. [Selection figure] None |