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    LIGHT EMITTING DEVICE
    11.
    发明申请
    LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20180090647A1

    公开(公告)日：2018-03-29

    申请号：US15715841

    申请日：2017-09-26

    Applicant: NICHIA CORPORATION

    Inventor： Shoji HOSOKAWA ,  Kazuya NISHIMATA ,  Tomokazu YOSHIDA

    IPC: H01L33/50 ,  G02F1/1335

    CPC classification number: H01L33/504 ,  G02F1/133603 ,  H01L33/502

    Abstract: Provided is a light emitting device capable of realizing color reproducibility in a broad range. The light emitting device contains a light emitting element having an emission peak wavelength in a range of 430 nm or more and 470 nm or less, a first fluorescent material having a composition represented by formula (I), which has an emission peak wavelength in a range of 510 nm or more and 525 nm or less and has an average particle diameter that is 10.0 μm or more and 30.0 μm or less, and a second fluorescent material having an emission peak wavelength in a range of 620 nm or more and 670 nm or less: X1aMgbMncAldOa+b+c+1.5d  (I) wherein X1 represents at least one element selected from the group consisting of Ba, Sr and Ca, and a, b, c and d satisfy 0.5≦a≦1.0, 0.0≦b≦0.7, 0.3≦c≦0.7, and 8.5≦d≦13.0.

    FLUORIDE PHOSPHOR, METHOD FOR MANUFACTURING SAME, AND LIGHT-EMITTING DEVICE
    13.
    发明公开
    FLUORIDE PHOSPHOR, METHOD FOR MANUFACTURING SAME, AND LIGHT-EMITTING DEVICE 审中-公开

    公开(公告)号：US20240240082A1

    公开(公告)日：2024-07-18

    申请号：US18565503

    申请日：2022-05-26

    Applicant: NICHIA CORPORATION

    Inventor： Kenichi AOYAGI ,  Tomokazu YOSHIDA ,  Kazuya NISHIMATA

    IPC: C09K11/77 ,  H01L33/50

    CPC classification number: C09K11/77348 ,  H01L33/502 ,  H01L2933/0041

    Abstract: Provided is a fluoride phosphor that can improve reliability in a light-emitting device. The fluoride phosphor includes fluoride particles and an oxide covering at least a portion of the surface of the fluoride particles. The oxide contains at least one element selected from the group consisting of Si, Al, Ti, Zr, Sn, and Zn, and a content percentage of the oxide is in a range from 2 mass % to 30 mass %. The fluoride particles have a composition containing an element M including at least one element selected from the group consisting of Group 4 elements, Group 13 elements, and Group 14 elements, an alkali metal, Mn, and F, and when the number of moles of the alkali metal is 2, the number of moles of Mn is in a range greater than 0 and less than 0.2, the number of moles of the element M is a range greater than 0.8 and less than 1, and the number of moles of F is in a range greater than 5 and less than 7.

    LIGHT-EMITTING MATERIAL AND METHOD FOR PRODUCING THE SAME
    14.
    发明公开
    LIGHT-EMITTING MATERIAL AND METHOD FOR PRODUCING THE SAME 审中-公开

    公开(公告)号：US20240240080A1

    公开(公告)日：2024-07-18

    申请号：US18565218

    申请日：2022-05-26

    Applicant: NICHIA CORPORATION

    Inventor： Tomokazu YOSHIDA ,  Kenichi AOYAGI ,  Kazuya NISHIMATA

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

    CPC classification number: C09K11/646 ,  C09K11/025 ,  H01L33/502

    Abstract: Provided is a light-emitting material containing a phosphor that emits red light with high luminance. The light-emitting material contains a fluoride phosphor having a first composition containing an alkali metal including K, Si, Al, Mn, and F. In the first composition, when a total number of moles of the alkali metal is 2, a total number of moles of Si, Al, and Mn is in a range from 0.9 to 1.1, a number of moles of Al is in a range from greater than 0 to 0.1, a number of moles of Mn is in a range from greater than 0 to 0.2, and a number of moles of F is in a range from 5.9 to less than 6.0. The fluoride phosphor has a cubic system crystal structure and has a lattice constant of 0.8138 nm or larger.

    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL, NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE
    16.
    发明申请
    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL, NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20200255730A1

    公开(公告)日：2020-08-13

    申请号：US16733633

    申请日：2020-01-03

    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.

    ALUMINATE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE
    18.
    发明申请
    ALUMINATE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20190338184A1

    公开(公告)日：2019-11-07

    申请号：US16516944

    申请日：2019-07-19

    Applicant: NICHIA CORPORATION

    Inventor： Kazuya NISHIMATA ,  Tomokazu YOSHIDA ,  Shoji HOSOKAWA

    IPC: C09K11/77 ,  H01L33/50

    Abstract: Disclosed are an aluminate fluorescent material having a high light emission intensity, and a light emitting device using the same. The aluminate fluorescent material includes a composition represented by the following formula (I). X1pEutMgqMnrAlsOp+t+q+r+1.5s  (I) wherein X1 represents at least one element selected from the group consisting of Ba, Sr, and Ca; and p, q, r, s, and t each satisfy 0.5≤p≤1.0, 0≤q

    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL, NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE
    19.
    发明申请
    METHOD FOR PRODUCING NITRIDE FLUORESCENT MATERIAL, NITRIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20190062633A1

    公开(公告)日：2019-02-28

    申请号：US16117514

    申请日：2018-08-30

    Applicant: NICHIA CORPORATION

    Inventor： Sadakazu WAKUI ,  Kazuya NISHIMATA ,  Shoji HOSOKAWA

    IPC: C09K11/77 ,  H01L33/50

    CPC classification number: C09K11/7734 ,  H01L33/502 ,  H01L33/504 ,  H01L2933/0041

    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.

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