公开(公告)号：US20220403236A1

公开(公告)日：2022-12-22

申请号：US17807845

申请日：2022-06-20

Applicant: NICHIA CORPORATION

Inventor： Yohei YAMAUCHI ,  Tomokazu YOSHIDA ,  Yuki SHIOTA

IPC: C09K11/61 ,  C09K11/64 ,  C09K11/02 ,  H01L33/50

Abstract: A fluoride phosphor, comprising fluoride particles having an average particle size of 0.1 μm to 7 μm and a maximum particle size of 1 μm to 18 μm, wherein a ratio of the maximum particle size with respect to the average particle size is higher than 1. The fluoride particles have a composition containing an element M containing at least one selected from the group consisting of Group 4 elements, Group 13 elements, and Group 14 elements; an alkali metal; Mn; and F. In the composition, when the number of moles of the alkali metal is 2, the number of moles of Mn is more than 0 but less than 0.2, the number of moles of the element M is more than 0.8 but less than 1, and the number of moles of F is more than 5 but less than 7.

公开(公告)号：US20220403231A1

公开(公告)日：2022-12-22

申请号：US17807851

申请日：2022-06-20

Applicant: NICHIA CORPORATION

Inventor： Yuki SHIOTA ,  Keisho YAMASHITA ,  Shoji HOSOKAWA ,  Tomokazu YOSHIDA ,  Yohei YAMAUCHI ,  Naoto KIJIMA

IPC: C09K11/02 ,  C09K11/61 ,  C09K11/06 ,  H01L51/00 ,  F21V9/30 ,  F21V8/00 ,  B32B27/36 ,  B32B27/30 ,  B32B27/08 ,  B32B3/12

Abstract: A wavelength conversion member including a wavelength conversion layer containing a fluoride phosphor, quantum dots, a surfactant, and a resin. The fluoride phosphor contains fluoride particles having a specific composition and having particle size values within specific ranges. The quantum dots include at least one selected from a first crystalline nanoparticle and a second crystalline nanoparticle. The first crystalline nanoparticle has a specific composition. When irradiated with light having a wavelength of 450 nm, the first crystalline nanoparticle emits light having an emission peak at a wavelength in a range from 510 nm to 535 nm, and a full width at half maximum of the emission peak of the first crystalline nanoparticle is in a range from 10 nm to 30 nm. The second crystalline nanoparticle includes a chalcopyrite-type crystalline structure, and a full width at half maximum of the emission peak of the second crystalline nanoparticle is 45 nm or less.