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公开(公告)号：US10665761B2
公开(公告)日：2020-05-26
申请号：US16328161
申请日：2017-10-18
发明人： Jun Moteki , Shohei Takaku , Yusuke Katsu , Takeshi Mitsuoka , Tsuneyuki Ito
IPC分类号： H01L33/50 , H01L33/16 , C09K11/77 , C04B35/115 , C04B35/117 , C04B35/44 , G02B5/20
摘要： An optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains of a component represented by formula A3B5O12:Ce, wherein A is at least one element selected from Sc, Y and lanthanoids (except for Ce), and B is at least one element selected from Al and Ga. Further, the following relations are satisfied: 0%≤X≤25%, 9%≤Y≤45%, and 48%≤Z≤90%, wherein X represents a proportion corresponding to the ratio a/N, Y represents a proportion corresponding to the ratio b/N, and Z represents a proportion corresponding to the ratio c/N and a, b, c and N are as defined herein. Also disclosed is a light-emitting device including the optical wavelength conversion member.
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公开(公告)号：US11214731B2
公开(公告)日：2022-01-04
申请号：US16488847
申请日：2017-11-10
发明人： Tsuneyuki Ito , Yusuke Katsu , Shohei Takaku
摘要： An optical wavelength conversion member (9) provided with a ceramic plate (11) which is configured from a polycrystalline body that is mainly composed of Al2O3 and a component represented by A3B5O12:Ce; and each of A and B in A3B5O12 represents at least one element selected from the element groups described below. In addition, a dielectric multilayer film (13) which transmits a specific wavelength and reflects another specific wavelength is formed on a light incident surface (11a) of the ceramic plate (11). The ceramic plate (11) has a porosity of 2% by volume or less, while having an average surface roughness (an arithmetic mean roughness Sa) of 0.5 μm or less. A: Sc, Y and lanthanoids (excluding Ce) B: Al and Ga. Also disclosed is a light-emitting device including the optical wavelength conversion member.
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公开(公告)号：US10910524B2
公开(公告)日：2021-02-02
申请号：US16342621
申请日：2017-10-20
发明人： Jun Moteki , Shohei Takaku , Yusuke Katsu , Takeshi Mitsuoka , Tsuneyuki Ito
IPC分类号： H01L33/50 , H01L33/48 , C04B35/50 , C04B35/44 , C04B35/64 , C09K11/77 , C09K11/08 , G02B5/20
摘要： An optical wavelength conversion member and a light-emitting device including the optical wavelength conversion member. The light-emitting device (1) includes a container (3), a light-emitting element (5), and an optical wavelength conversion member (9). The optical wavelength conversion member (9) is composed of a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains of a component represented by formula A3B5O12:Ce. Specifically, A and B of the A3B5O12 individually represent at least one element selected from the following element groups: A: Sc, Y, and lanthanoids (except for Ce), and B: Al and Ga; the at least one element selected from the element groups is present in each crystal grain and the crystal grain boundary of the ceramic sintered body; and the element concentration of the crystal grain boundary is higher than the element concentration of the crystal grain.
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公开(公告)号：US11945987B2
公开(公告)日：2024-04-02
申请号：US16973367
申请日：2019-07-17
CPC分类号： C09K11/7774 , C04B35/10 , C09K11/02 , H01L33/502 , C04B2235/3222 , H01L2933/0041
摘要： In one aspect of the present disclosure, there is provided an optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains represented by formula X3Al5O12:Ce. In the optical wavelength conversion member 9, atoms of element X are present also in an Al2O3 crystal grain adjacent to the interface between the Al2O3 crystal grain and an X3Al5O12:Ce crystal grain.
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公开(公告)号：US11316078B2
公开(公告)日：2022-04-26
申请号：US16651434
申请日：2018-09-10
发明人： Syohei Takaku , Yusuke Katsu , Tsuneyuki Ito , Yuki Shimura , Shinji Ban , Takeshi Mitsuoka
IPC分类号： H01L33/50 , F21V29/502 , F21V7/30 , F21V9/32 , C04B35/117 , F21V13/08 , F21V8/00 , F21V29/90
摘要： An optical wavelength converter (1) is configured such that an optical wavelength conversion member (9) is bonded to a heat dissipation member (13) having superior heat dissipation property. Thus, heat generated by light incident on the optical wavelength conversion member (9) can be efficiently dissipated. Therefore, even when high-energy light is incident on the optical wavelength converter, temperature quenching is less likely to occur, and thus high fluorescence intensity can be maintained. An intermediate film (21) is disposed between a reflective film (19) and a bonding portion (15). The presence of the intermediate film (21) improves the adhesion between the reflective film (19) and the bonding portion (15), thereby enhancing the heat dissipation from the optical wavelength conversion member (9) to the heat dissipation member (13). Thus, the temperature quenching of the optical wavelength conversion member (9) can be prevented, thereby enhancing fluorescence intensity.
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公开(公告)号：US11560513B2
公开(公告)日：2023-01-24
申请号：US16973322
申请日：2019-07-01
IPC分类号： C09K11/02 , F21V9/30 , C04B35/117 , C09K11/77 , F21Y115/30
摘要： One aspect of the disclosure provides an optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains represented by formula (Y,A)3B5O12:Ce. In the optical wavelength conversion member, a (Y,A)3B5O12:Ce crystal grain has a region wherein the A concentration of a peripheral portion of the (Y,A)3B5O12:Ce crystal grain is higher than that of an interior portion of the (Y,A)3B5O12:Ce crystal grain. Thus, the optical wavelength conversion member exhibits high fluorescence intensity (i.e., high emission intensity) and high heat resistance (i.e., low likelihood of temperature quenching). The optical wavelength conversion member has a structure wherein the element A concentration of a peripheral portion of a (Y,A)3B5O12:Ce crystal grain differs from that in an interior portion of the crystal grain. This structure can achieve a ceramic fluorescent body exhibiting superior fluorescent characteristics and superior thermal characteristics with varied colors of emitted light.
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公开(公告)号：US11063186B2
公开(公告)日：2021-07-13
申请号：US16343188
申请日：2017-10-24
发明人： Yusuke Katsu , Shohei Takaku , Tsuneyuki Ito , Takeshi Mitsuoka , Jun Moteki
IPC分类号： H01L33/50 , C04B35/50 , G02B5/20 , C09K11/08 , H01L33/48 , B32B15/04 , C09K11/77 , C09K11/02 , C04B35/117 , C04B35/44 , C04B35/645 , B32B7/027
摘要： A method for producing an optical wavelength conversion member (9) composed of a sintered body containing, as main components, Al2O3 and a component represented by formula A3B5O12:Ce; an optical wavelength conversion member; an optical wavelength conversion component including the optical wavelength conversion member; and a light-emitting device including the optical wavelength conversion member or the optical wavelength conversion component. The production method of the sintered body includes firing in a firing atmosphere having a pressure of 104 Pa or more and an oxygen concentration of 0.8 vol. % or more and less than 25 vol. %.
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公开(公告)号：US10727378B2
公开(公告)日：2020-07-28
申请号：US16342390
申请日：2017-10-20
发明人： Shohei Takaku , Yusuke Katsu , Tsuneyuki Ito , Yuki Shimura , Takeshi Mitsuoka , Jun Moteki
摘要： An optical wavelength conversion member and a light-emitting device including the optical wavelength conversion member. The optical wavelength conversion member (9) is formed of a ceramic sintered body having a fluorescent phase containing fluorescent crystal grains as a main component and a translucent phase containing translucent crystal grains as a main component. Crystal grains of the fluorescent phase have a composition represented by formula A3B5O12:Ce, where the element A is selected from Sc, Y, and lanthanoids (except for Ce), and the element B is selected from Al and Ga. In the optical wavelength conversion member (9), 0.3
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