公开(公告)号：US10975302B2

公开(公告)日：2021-04-13

申请号：US16375848

申请日：2019-04-04

Applicant: Intematix Corporation

Inventor： Yi-Qun Li ,  Xiongfei Shen ,  Haoguo Zhu ,  Kuanping Gong ,  Samuel Lowell Dunscombe

IPC: C09K11/88 ,  C23C16/40 ,  C23C16/44 ,  H01L33/50 ,  C09K11/02 ,  C23C16/442

Abstract: A coated phosphor comprises: phosphor particles comprised of a phosphor with composition MSe1−xSx:Eu, wherein M is at least one of Mg, Ca, Sr, Ba and Zn and 0

公开(公告)号：US11015116B2

公开(公告)日：2021-05-25

申请号：US16814110

申请日：2020-03-10

Applicant: Intematix Corporation

Inventor： Haoguo Zhu ,  Yi-Qun Li ,  Kuanping Gong ,  Samuel Lowell Dunscombe

IPC: C09K11/02 ,  C09K11/77 ,  H01L33/50 ,  F21K9/64 ,  H01L33/32 ,  H01L33/48 ,  H01L33/56 ,  H01L33/60 ,  H01L33/62

Abstract: A coated phosphor may comprise: phosphor particles comprised of a phosphor with composition (M)(A)2S4:Eu, wherein: M is at least one of Mg, Ca, Sr and Ba; and A is at least one of Ga, Al, In, Y; a dense impermeable (pinhole-free) coating of an oxide material encapsulating individual ones of the phosphor particles. The coated phosphor is configured to satisfy one or more of the conditions: (1) under excitation by blue light, the reduction in photoluminescent intensity at the peak emission wavelength after 1,000 hours of aging at about 85° C. and about 85% relative humidity is no greater than about 30%; (2) the change in chromaticity coordinates CIE(y), ΔCIE y, after 1,000 hours of aging at about 85° C. and about 85 % relative humidity is less than about 5×10−3; (3) said coated phosphor does not turn black when suspended in a 1 mol/L silver nitrate solution for at least two hours at 85° C.; (4) said coated phosphor does not turn black when suspended in a 1 mol/L silver nitrate solution for at least one day at 20° C.; and (5) said coated phosphor does not turn black when suspended in a 1 mol/L silver nitrate solution for at least 5 days at 20° C.