| abstract |
The method for synthesizing the color stability Mn 4 + doped phosphor is by contacting a precursor of the following formula (I), (II), (III) or (IV) with a fluorine-containing oxidizing agent in gaseous form at an elevated temperature to obtain color stability Mn. and a contacting step of generating 4 + doped phosphor: A a B b C c D d X x :Mn 4+ (I) A ai B bi C ci D d X x Y d :Mn 4+ (II) A 1 3 G 2-m- n Mn m Mg n Li 3 F 12 O p (III) AZF 4 :Mn 4+ (IV) In the above formula, A is Li, Na, K, Rb, Cs, or a combination thereof; B is Be, Mg, Ca, Sr, Ba, or a combination thereof; C is Sc, Y, B, Al, Ga, In, Tl, or a combination thereof; D is Ti, Zr, Hf, Rf, Si, Ge, Sn, Pb, or a combination thereof; X is F or a combination of F and one or more of Br, Cl and I; Y is O or a combination of O and one or more of S and Se; A 1 is Na or K, or a combination thereof; G is Al, B, Sc, Fe, Cr, Ti, In, or a combination thereof; Z is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc, Y, In, or a combination thereof; 0≦a<2; 0≦b<1; 0≦c<1; 0≦d≦1; 0.8≦ai≦1.2; 0.8≦bi≦1.2; 0≦ci≦1.2; 5.0≦x≦7; 0.8≦c+d≦1.2; a + 2b + 3c + 4d = x; 0.8≦ci + d≦1; 5.0≦x+d≦7.0; ai + 2bi + 3ci + 4d = x + 2d; 0.02≦m≦0.2; 0≦n≦0.4; And 0 ≤ p <1. |