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公开(公告)号：US20240360360A1
公开(公告)日：2024-10-31
申请号：US18273976
申请日：2021-01-28
Applicant: SHARP KABUSHIKI KAISHA , NS Materials Inc.
Inventor： Masaki YAMAMOTO , Kazuki GOTO , HIROHISA YAMADA , MASAYA UEDA , Yuko OGURA , Masanori TANAKA , Mikihiro TAKASAKI , Yuka TAKAMIZUMA , Soichiro NIKATA , Tetsuji ITO , Mayuko WATANABE
IPC: C09K11/88 , C09K11/02 , C09K11/56 , H10K50/115 , H10K50/87
CPC classification number: C09K11/883 , C09K11/02 , C09K11/565 , H10K50/115 , H10K50/87
Abstract: A quantum dot includes a core including Zn and Se, and a shell composed of ZnS and provided on a surface of the core, adjacently to the core. The quantum dot-emits blue light, is Cd free, and has a particle diameter within a range from 3 nm to 20 nm and a fluorescence lifetime in a thin film state of 50 ns or less.
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公开(公告)号：US20240107792A1
公开(公告)日：2024-03-28
申请号：US18276026
申请日：2021-02-18
Applicant: SHARP KABUSHIKI KAISHA , NS Materials Inc.
Inventor： Kazuki GOTO , YUSUKE SAKAKIBARA , Yuma YAGUCHI , Keisuke KITANO , Masaki YAMAMOTO , Soichiro NIKATA , Yoko MICHIWAKI , Yuko OGURA , Vit KALOUSEK , Akio MISHIMA
CPC classification number: H10K50/115 , C09K11/02 , C09K11/584 , C09K11/623 , C09K11/883 , H10K50/15 , H10K50/16 , H10K2102/351
Abstract: A light-emitting element includes an anode electrode, a cathode electrode, and a QD layer provided between the anode electrode and the cathode electrode, the QD layer containing the QDs. The QDs are AgInxGa1-xSySe1-y-based or ZnAgInxGa1-xSySe1-y-based Cd-free QDs (0≤x
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公开(公告)号：US20240209259A1
公开(公告)日：2024-06-27
申请号：US18601397
申请日：2024-03-11
Applicant: NS MATERIALS INC.
Inventor： Soichiro NIKATA , Yuko OGURA , Mikihiro TAKASAKI , Yuka TAKAMIZUMA
CPC classification number: C09K11/883 , C01B19/04 , C09K11/88 , B82Y20/00 , B82Y40/00 , C01P2004/64 , C01P2006/60
Abstract: An object is to provide a quantum dot that has a narrow fluorescence half-width and a high fluorescence quantum yield, and emits blue fluorescence. A quantum dot (5) according to the present invention includes at least Zn and Se and does not include Cd, and has a particle diameter of 5 nm or more and 20 nm or less. In addition, the quantum dot (5) according to the present invention includes at least Zn and Se and does not include Cd, and has a fluorescence quantum yield of 58 or more and a fluorescence half-width of 25 nm or less. In the present invention, the fluorescence lifetime can be made 50 ns or less.
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公开(公告)号：US20240059966A1
公开(公告)日：2024-02-22
申请号：US18383091
申请日：2023-10-24
Applicant: NS MATERIALS INC.
Inventor： Soichiro NIKATA , Yoko MICHIWAKI , Tomoaki HIEDA , Yuko OGURA , Akio MISHIMA , Vit KALOUSEK
CPC classification number: C09K11/883 , C01G15/006 , B82Y20/00
Abstract: To provide Cd-free chalcopyrite-based quantum dots with a narrow fluorescence FWHM and a high fluorescence quantum yield. The quantum dots of the present invention contain AgInxGa1-xSySe1-y or ZnAgInxGa1-xSySe1-y (where 0≤x
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公开(公告)号：US20200347296A1
公开(公告)日：2020-11-05
申请号：US16754578
申请日：2018-10-12
Applicant: NS MATERIALS INC.
Inventor： Yuko OGURA , Yuka TAKAMIZUMA , Kazunori IIDA , Emi TSUTSUMI , Masanori TANAKA , Soichiro NIKATA
Abstract: Provided is a Cd-free blue fluorescent quantum dot with a narrow fluorescence FWHM. The quantum dot does not contain cadmium and its fluorescence FWHIM is 25 nm or less. The quantum dot is preferably a na.nocrystal containing zinc and selenium or zinc and selenium and sulfur. Further, the quantum dot preferably has a core-shell structure in which the nanocrystal serves as a core and the surface of the core is coated with a shell.
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Patent Agency Ranking
公开(公告)号：US20210388263A1
公开(公告)日：2021-12-16
申请号：US17405687
申请日：2021-08-18
Applicant: NS MATERIALS INC.
Inventor： Yuko OGURA , Yuka TAKAMIZUMA , Kazunori IIDA , Emi TSUTSUMI , Masanori TANAKA , Soichiro NIKATA
Abstract: Provided is a Cd-free blue fluorescent quantum dot with a narrow fluorescence FWHM. The quantum dot does not contain cadmium and its fluorescence FWHM is 25 nm or less. The quantum dot is preferably a nanocrystal containing zinc and selenium or zinc and selenium and sulfur. Further, the quantum dot preferably has a core-shell structure in which the nanocrystal serves as a core and the surface of the core is coated with a shell.
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公开(公告)号：US20210363422A1
公开(公告)日：2021-11-25
申请号：US17257074
申请日：2020-07-31
Applicant: NS Materials Inc.
Inventor： Soichiro NIKATA , Yoko MICHIWAKI , Tomoaki HIEDA , Yuko OGURA , Akio MISHIMA , Vit KALOUSEK
Abstract: To provide Cd-free chalcopyrite-based quantum dots with a narrow fluorescence FWHM and a high fluorescence quantum yield. The quantum dots of the present invention contain AgInxGa1-xSySe1-y or ZnAgInxGa1-xSySe1-y (where 0≤x
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公开(公告)号：US20200212256A1
公开(公告)日：2020-07-02
申请号：US16633010
申请日：2018-07-27
Applicant: NS MATERIALS INC.
Inventor： Kazunori IIDA , Emi TSUTSUMI , Yuko OGURA , Masanori TANAKA , Soichiro NIKATA , Yuka TAKAMIZUMA
IPC: H01L33/06 , H01L33/50 , G02F1/13357 , B82Y15/00 , B82Y40/00
Abstract: The present invention seeks to provide cadmium-free quantum dots with a narrow fluorescence FWHM. The quantum dot does not contain cadmium and its fluorescence FWHM is 30 nm or less. The quantum dot is preferably a nanocrystal containing zinc and tellurium or zinc and tellurium and sulfur or zinc and tellurium and selenium and sulfur. Further, the quantum dot preferably has a core-shell structure in which the nanocrystal serves as a core and the surface of the core is coated with a shell.
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公开(公告)号：US20240124774A1
公开(公告)日：2024-04-18
申请号：US18386884
申请日：2023-11-03
Applicant: NS MATERIALS INC.
Inventor： Yuko OGURA , Yuka TAKAMIZUMA , Kazunori IIDA , Emi TSUTSUMI , Masanori TANAKA , Soichiro NIKATA
CPC classification number: C09K11/883 , C09K11/025 , F21V9/30 , B82Y20/00
Abstract: A Cd-free blue fluorescent quantum dot with a narrow fluorescence FWHM. The quantum dot does not contain cadmium and its fluorescence FWHM is 25 nm or less. The quantum dot is preferably a nanocrystal containing zinc and selenium or zinc and selenium and sulfur. Further, the quantum dot preferably has a core-shell structure in which the nanocrystal serves as a core and the surface of the core is coated with a shell.
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公开(公告)号：US20240079518A1
公开(公告)日：2024-03-07
申请号：US18268487
申请日：2021-12-24
Applicant: NS MATERIALS INC.
Inventor： Akio MISHIMA , Soichiro NIKATA , Vit KALOUSEK , Toshiaki SHIMASAKI , Yuko OGURA , Mikihiro TAKASAKI , Shogo UEDA , Yuya ASHIMURA
CPC classification number: H01L33/06 , H01L33/005
Abstract: An object of the present invention is to provide a method for manufacturing quantum dots capable of containing a large amount of Zn on a surface thereof, and a quantum dot. A method for manufacturing quantum dots of the present invention includes a step of producing a core containing at least Ag, Ga, and S or Ag, Ga, and Se, and a step of coating a surface of the core with a shell, and in the step of coating with the shell, the surface of the core is coated with GaS, and then Zn is added. It is preferable that the surface of the core is coated with ZnS after being coated with GaS. It is preferable that the core and the shell do not contain Cd and In.
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