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    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL AND NITRIDE FLUORESCENT MATERIAL
    1.
    发明公开
    METHOD OF PRODUCING NITRIDE FLUORESCENT MATERIAL AND NITRIDE FLUORESCENT MATERIAL 审中-公开

    公开(公告)号：US20240209256A1

    公开(公告)日：2024-06-27

    申请号：US18394693

    申请日：2023-12-22

    申请人： NICHIA CORPORATION

    发明人： Sadakazu WAKUI ,  Kohei KUNIMOTO ,  Hiroyuki WATANABE ,  Eishi KANAI

    IPC分类号： C09K11/08 ,  C09K11/77

    CPC分类号： C09K11/0883 ,  C09K11/77347

    摘要： A method of producing a nitride fluorescent material includes preparing a calcined product including a fluorescent material core, and a first film containing fluoride on a surface of the fluorescent material core, bringing the calcined product into contact with a solution containing a metal alkoxide containing an element M2 being at least one element selected from the group consisting of Si, Al, Ti, Zr, Sn, and Zn at a temperature equal to or lower than an ambient temperature and hydrolyzing and condensation-polymerizing the metal alkoxide to form a second film containing an oxide containing the element M2, and performing a heat-treatment at a temperature higher than 250° C. and equal to or lower than 500° C. The nitride fluorescent material includes the fluorescent material core having a composition containing an element Ma being at least one element selected from the group consisting of Sr, Ca, Ba, and Mg, an element Mb being at least one element selected from the group consisting of Li, Na, and K, an element Mc being at least one element selected from the group consisting of Eu, Ce, Tb, and Mn, Al, N, and optionally Si.

    Phosphor, method for producing same and light emitting element
    4.
    发明授权
    Phosphor, method for producing same and light emitting element 有权

    公开(公告)号：US11898080B2

    公开(公告)日：2024-02-13

    申请号：US17600575

    申请日：2020-03-16

    申请人： National Institute for Materials Science

    发明人： Naoto Hirosaki

    IPC分类号： C09K11/77 ,  C01F17/30 ,  H01L33/50

    CPC分类号： C09K11/77348 ,  C01F17/30 ,  C09K11/77347 ,  H01L33/502 ,  C01P2002/30 ,  C01P2002/70 ,  C01P2006/60

    摘要： Provided is a phosphor which emits near-infrared light upon irradiation of visible light or ultraviolet light. A phosphor in an embodiment of the present invention includes an inorganic substance which contains at least an Eu element, an M[3] element (M[3] is at least one selected from the group consisting of Al, Y, La and Gd.), a Si element and nitrogen element, and also contains, if necessary, at least one element selected from the group consisting of M[1] element (M[1] is Li element.), an M[2] element (M[2] is at least one element selected from the group consisting of Mg, Ca, Ba and Sr.) and an oxygen element, while the phosphor has a maximum value of an emission peak at a wavelength in the range of 760 nm or more and 850 nm and less upon irradiation by an excitation source.

    OXIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE
    6.
    发明公开
    OXIDE FLUORESCENT MATERIAL AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20230167358A1

    公开(公告)日：2023-06-01

    申请号：US18060395

    申请日：2022-11-30

    申请人： NICHIA CORPORATION

    发明人： Yoshinori MURAZAKI

    IPC分类号： C09K11/68 ,  H01L33/50 ,  C09K11/77

    CPC分类号： C09K11/684 ,  H01L33/502 ,  C09K11/681 ,  C09K11/7739 ,  C09K11/77342 ,  C09K11/7774 ,  C09K11/77348 ,  C09K11/77347

    摘要： To provide an oxide fluorescent material that has a light emission peak wavelength in a wavelength range of from red light to near infrared light. The oxide fluorescent material has a composition encompassed in a compositional formula represented by the following formula (1):


    (Li1-tM1t)u(Ga1-vM2v)5Ow:Crx,Niy,M3z,  (1)

    wherein in the formula (1), M1 represents at least one kind of an element selected from the group consisting of Na, K, Rb, and Cs; M2 represents at least one kind of an element selected from the group consisting of B, Al, Sc, In, and a rare earth element; M3 represents at least one kind of an element selected from the group consisting of Si, Ge, Sn, Ti, Zr, Hf, Bi, V, Nb, and Ta; and t, u, v, w, x, y, and z each satisfy 0≤t≤1.0, 0.7≤u≤1.6, 0≤v

    Method for producing ceramic sintered body, ceramic sintered body, and light emitting device
    9.
    发明授权
    Method for producing ceramic sintered body, ceramic sintered body, and light emitting device 有权

    公开(公告)号：US11976228B2

    公开(公告)日：2024-05-07

    申请号：US17643883

    申请日：2021-12-13

    申请人： NICHIA CORPORATION

    发明人： Hirofumi Ooguri ,  Shoji Hosokawa

    IPC分类号： C09K11/77 ,  C09K11/08 ,  H01L33/50

    CPC分类号： C09K11/77347 ,  C09K11/0883 ,  H01L33/502 ,  H01L2933/0041

    摘要： Provided are a method for producing a ceramic sintered body having improved light emission intensity, a ceramic sintered body, and a light emitting device. The method for producing a ceramic sintered body comprises preparing a molded body that contains a nitride fluorescent material having a composition containing: at least one alkaline earth metal element M1 selected from the group consisting of Ba, Sr, Ca, and Mg; at least one metal element M2 selected from the group consisting of Eu, Ce, Tb, and Mn; Si; and N, wherein a total molar ratio of the alkaline earth metal element M1 and the metal element M2 in 1 mol of the composition is 2, a molar ratio of the metal element M2 is a product of 2 and a parameter y and wherein y is in a range of 0.001 or more and less than 0.5, a molar ratio of Si is 5, and a molar ratio of N is 8, and wherein the nitride fluorescent material has a crystallite size, as calculated by X-ray diffraction measurement using the Halder-Wagner method, of 550 Å or less, and calcining the molded body at a temperature in a range of 1,600° C. or more and 2,200° C. or less to obtain a sintered body.