公开(公告)号：US20180265778A1

公开(公告)日：2018-09-20

申请号：US15709557

申请日：2017-09-20

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Fangming DU ,  James Edward MURPHY ,  Srinivas Prasad SISTA ,  Clark David NELSON ,  Jenna Marie BALDESARE

IPC: C09K11/61 ,  H01L33/50

Abstract: A process for preparing a Mn+4 doped phosphor of formula I includes gradually adding a first solution comprising a source of M and HF and a second solution comprising a source of Mn to a reactor, in the presence of a source of A and an anion selected from phosphate, sulfate, acetate, and combinations thereof, to form a product liquor comprising the Mn+4 doped phosphor. The process also includes gradually discharging the product liquor from the reactor while volume of the product liquor in the reactor remains constant. A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is the absolute value of the charge of the [MFy] ion; and y is 5, 6 or 7.

公开(公告)号：US20180155618A1

公开(公告)日：2018-06-07

申请号：US15574539

申请日：2015-05-18

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Srinivas Prasad SISTA ,  Anant Achyut SETLUR

IPC: C09K11/64 ,  C09K11/61 ,  H01L33/50

CPC classification number: C09K11/645 ,  C09K11/615 ,  C09K11/616 ,  C09K11/628 ,  C09K11/675 ,  C09K11/676 ,  C09K11/696 ,  C09K11/7705 ,  G02F1/133514 ,  G02F1/1336 ,  G02F2001/133614 ,  H01L33/502 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2924/181 ,  H01L2924/00014 ,  H01L2924/00012

Abstract: Synthesizing a color stable Mn4+ doped phosphor by contacting a gaseous fluorine-containing oxidizing agent with a precursor of: AaBbCcDdXx:Mn4+; AaiBbiCciDdXxYd:Mn4+; A13G2−m−nMnmMgnLi3F12Op; or AZF4:Mn4+. Where A is Li, Na, K, Rb, Cs, or a combination; B is Be, Mg, Ca, Sr, Ba, or a combination; C is Sc, Y, B, Al, Ga, In, Tl, or a combination; D is Ti, Zr, Hf, Rf, Si, Ge, Sn, Pb, or a combination; X is F or a combination of F and one of Br, Cl, and I; Y is O, or a combination of O and one of S and Se; A1 is Na or K, or a combination; G is Al, B, Sc, Fe, Cr, Ti, In, or a combination; Z is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc, Y, In, or a combination.