公开(公告)号：US20160090528A1

公开(公告)日：2016-03-31

申请号：US14867614

申请日：2015-09-28

Applicant: NICHIA CORPORATION

Inventor： Tomokazu YOSHIDA ,  Shoji HOSAKAWA ,  Sadakazu WAKUI ,  Toshiyuki OKAZAKI

IPC: C09K11/61 ,  H01L33/50

CPC classification number: C09K11/617 ,  H01L33/504 ,  H01L2224/32245 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  H01L2924/181 ,  H01L2924/00012 ,  H01L2924/00014 ,  H01L2924/00

Abstract: A method for producing a fluoride fluorescent material including: preparing a first solution containing manganese, a second solution containing at least one cation selected from the group consisting of K+, Li+, Na+, Rb+, Cs+, and NH4+, and a third solution containing at least one element selected from the group consisting of the elements from Groups 4 and 14 of the periodic table, and adding the first and third solutions dropwise, each at a rate of 0.3% or less of the total volume of the solution per minute to the second solution to obtain particles having a composition represented by formula (I): A2[M1-αMn4+aF6] (I) wherein A denotes at least one cation selected from the group consisting of K+, Na+, Rb+, Cs+, and NH4+; M denotes at least one element selected from the group consisting of the elements from Groups 4 and 14 of the periodic table; and a satisfies 0.04

Abstract translation: 一种生产氟化物荧光材料的方法，包括：制备含有锰的第一溶液，含有至少一种选自K +，Li +，Na +，Rb +，Cs +和NH 4 +的阳离子的第二溶液，以及含有 至少一种选自元素周期表第4和14族的元素的元素，并逐滴加入第一和第三溶液，每一种溶液以每分钟溶液总体积的0.3％或更少的速率加入到 获得具有式（I）表示的组成的颗粒的第二溶液：A2 [M1-αMn4+ aF6]（I）其中A表示选自K +，Na +，Rb +，Cs +和NH4 +中的至少一种阳离子; M表示选自元素周期表第4和14族的元素中的至少一种元素; a满足0.04

公开(公告)号：US20210032536A1

公开(公告)日：2021-02-04

申请号：US17063696

申请日：2020-10-05

Applicant: NICHIA CORPORATION

Inventor： Sadakazu WAKUI ,  Kazuya NISHIMATA ,  Shoji HOSOKAWA

IPC: C09K11/77 ,  H01L33/50

Abstract: Disclosed are a production method for a nitride fluorescent material, a nitride fluorescent material and a light emitting device. The production method is for producing a nitride fluorescent material that has, as a fluorescent material core, a calcined body having a composition containing at least one element Ma selected from the group consisting of Sr, Ca, Ba and Mg, at least one element Mb selected from the group consisting of Li, Na and K, at least one element Mc selected from the group consisting of Eu, Ce, Tb and Mn, and Al, and optionally Si, and N, and the method includes preparing a calcined body having the above-mentioned composition, bringing the calcined body into contact with a fluorine-containing substance, and subjecting it to a first heat treatment at a temperature of 100° C. or higher and 500° C. or lower to form a fluoride-containing first film on the calcined body, and forming on the calcined body, a second film that contains a metal oxide containing at least one metal element M2 selected from the group consisting of Si, Al, Ti, Zr, Sn and Zn and subjecting it to a second heat treatment at a temperature in a range of higher than 250° C. and 500° C. or lower.

公开(公告)号：US20190288165A1

公开(公告)日：2019-09-19

申请号：US16352473

申请日：2019-03-13

Applicant: NICHIA CORPORATION

Inventor： Mika AMIYA ,  Kazushige FUJIO ,  Sadakazu WAKUI

IPC: H01L33/50 ,  A01G7/04 ,  H01L25/075

Abstract: A light emitting device includes a light emitting element having an emission peak wavelength in a range of 380 nm or more and 490 nm or less, and a red fluorescent material which is excited by the light from the light emitting element to emit light having at least one light emission peak wavelength in a range of 580 nm or more and 680 nm or less, wherein a ratio of the photon flux R of red light in a range of 620 nm or more and 700 nm or less to the photon flux B of blue light in a range of 400 nm or more and 490 nm or less, R/B, is in a range of more than 20 and 200 or less.

公开(公告)号：US20180171221A1

公开(公告)日：2018-06-21

申请号：US15842133

申请日：2017-12-14

Applicant: NICHIA CORPORATION

Inventor： Sadakazu WAKUI ,  Shigeki YOSHIDA ,  Shoji HOSOKAWA

IPC: C09K11/77 ,  C01F7/00 ,  C01F17/00 ,  C01D13/00

Abstract: Provided is a production method of a nitride fluorescent material capable of producing a nitride fluorescent material having a higher emission intensity. The production method is for producing a nitride fluorescent material having a composition containing at least one element Ma selected from the group consisting of Sr, Ca, Ba and Mg, at least one element Mb selected from the group consisting of Li, Na and K, at least one element Mc selected from the group consisting of Eu, Ce, Tb and Mn, and Al and N, which includes subjecting a raw material mixture containing elements constituting the composition of the nitride fluorescent material, along with SrF2 and/or LiF added thereto as a flux, to a heat treatment, wherein the amount of the flux is in a range of 5.0% by mass or more and 15% by mass or less relative to the total amount, 100% by mass of the raw material mixture and the flux.

公开(公告)号：US20170054059A1

公开(公告)日：2017-02-23

申请号：US15234249

申请日：2016-08-11

Applicant: NICHIA CORPORATION

Inventor： Shoji HOSOKAWA ,  Sadakazu WAKUI

IPC: H01L33/50 ,  H01L33/62 ,  H01L33/56 ,  H01L33/32 ,  H01L33/48

CPC classification number: H01L33/504 ,  H01L33/32 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  H01L2924/181 ,  H01L2924/00014 ,  H01L2924/00012

Abstract: A light emitting device that includes a light emitting element having a peak emission wavelength at 400-480 nm and a fluorescent member can be provided. The fluorescent member includes a first fluorescent material that includes a nitride containing alkaline-earth metal, alkali metal, aluminium and europium, a second fluorescent material that includes a nitride containing alkaline-earth metal, aluminium, silicon and europium, and a third fluorescent material having a peak emission wavelength in a range of from 500 nm to 560 nm. A content of the first fluorescent material to a total content of the first fluorescent material and the second fluorescent material is from 5% by mass to 95% by mass.

Abstract translation: 可以提供包括具有400-480nm的峰值发射波长的发光元件和荧光部件的发光器件。 荧光部件包括包含碱土金属，碱金属，铝和铕的氮化物的第一荧光体，包含碱土类金属，铝，硅和铕的氮化物的第二荧光材料和第三荧光体 具有500nm至560nm范围内的峰值发射波长。 第一荧光体的含量相对于第一荧光体和第二荧光体的总含量为5质量％〜95质量％。

公开(公告)号：US20150291878A1

公开(公告)日：2015-10-15

申请号：US14683046

申请日：2015-04-09

Applicant: Nichia Corporation

Inventor： Sadakazu WAKUI ,  Shoji HOSOKAWA

IPC: C09K11/61 ,  H01L33/50 ,  F21K99/00

CPC classification number: C09K11/617 ,  C09K11/616 ,  H01L33/502 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265

Abstract: Provided are a red light emitting fluorescent material excellent in durability, and a method for producing the red light emitting fluorescent material. The present disclosure provides a method for producing a fluoride fluorescent material that includes subjecting a mixture that contains a fluoride in a liquid medium to a pressurization treatment and a heating treatment, the fluoride having a chemical composition represented by the following formula (I). The present disclosure also provides a fluoride fluorescent material that exhibits a rate of decrease in light-emitting energy efficiency is 5% or less after the fluoride fluorescent material is irradiated with laser light having a wavelength of 445 nm at an optical density of 3.5 W/cm2 for 300 seconds, and has a chemical composition represented by the following formula (I). A2[M1-aMn4+aF6]  (I) In the formula (I), A represents at least one cation selected from the group consisting of K+, Li+, Na+, Rb+, Cs+ and NH4+, M represents at least one element selected from the group consisting of Group 4 elements and Group 14 elements, and a represents a number that satisfies 0

Abstract translation: 提供耐久性优异的红色发光荧光材料和制造红色发光荧光材料的方法。 本公开内容提供了一种氟化物荧光材料的制造方法，其包括使含有液体介质中的氟化物的混合物进行加压处理和加热处理，所述氟化物具有由下式（I）表示的化学组成。 本发明还提供一种氟化物荧光材料，其在以3.5W /分钟的光密度对氟化物荧光材料用波长445nm的激光照射后，发光能量效率的降低率为5％以下， cm2，300秒，具有下述式（I）表示的化学组成。 A2 [M1-aMn4 + aF6]（I）在式（I）中，A表示选自K +，Li +，Na +，Rb +，Cs +和NH 4 +的至少一种阳离子，M表示选自 由第4组元素和第14族元素组成的组，a表示满足0