| 摘要 |
A color stable Mn4+ doped phosphor of formula I,
Ax[MFy]:Mn4+ Iwherein
A is Li, Na, K, Rb, Cs, or a combination thereof;M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof;x is the absolute value of the charge of the [MFy] ion;y is 5, 6 or 7; andwherein % intensity loss of the phosphor after exposure to light flux of at least 80 w/cm2 at a temperature of at least 50° C. for at least 21 hours is ≦4%. |
| 主权项 |
1. A process for synthesizing a Mn4+ doped phosphor, the process comprising contacting a precursor at an elevated temperature with a fluorine-containing oxidizing agent in gaseous form, wherein the precursor is selected from the group consisting of
(A) A2[MF5]:Mn4+, where A is selected from Li, Na, K, Rb, Cs, and combinations thereof; and where M is selected from Al, Ga, In, and combinations thereof; (B) A3[MF6]: Mn4+, where A is selected from Li, Na, K, Rb, Cs, and combinations thereof; and where M is selected from Al, Ga, In, and combinations thereof; (C) Zn2[MF7]: Mn4+, where M is selected from Al, Ga, In, and combinations thereof; (D) A[In2F7]: Mn4+ where A is selected from Li, Na, K, Rb, Cs, and combinations thereof; (E) E[MF6]Mn4+, where E is selected from Mg, Ca, Sr, Ba, Zn, and combinations thereof; and where M is selected from Ge, Si, Sn, Ti, Zr, and combinations thereof; (F) Ba0.65Zr0.35F2.70: Mn4+; and (G) A3[ZrF7]: Mn4+ where A is selected from Li, Na, K, Rb, Cs and combinations thereof. |
