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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
申请人： NS MATERIALS INC.
发明人： Yuko OGURA , Yuka TAKAMIZUMA , Kazunori IIDA , Emi TSUTSUMI , Masanori TANAKA , Soichiro NIKATA
CPC分类号： C09K11/883 , C09K11/025 , F21V9/30 , B82Y20/00
摘要： 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：US20210371744A1
公开(公告)日：2021-12-02
申请号：US17257101
申请日：2020-09-16
申请人： NS Materials Inc.
摘要： 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 5% 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：US20240209259A1
公开(公告)日：2024-06-27
申请号：US18601397
申请日：2024-03-11
申请人： NS MATERIALS INC.
CPC分类号： C09K11/883 , C01B19/04 , C09K11/88 , B82Y20/00 , B82Y40/00 , C01P2004/64 , C01P2006/60
摘要： 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：US20200347296A1
公开(公告)日：2020-11-05
申请号：US16754578
申请日：2018-10-12
申请人： NS MATERIALS INC.
发明人： Yuko OGURA , Yuka TAKAMIZUMA , Kazunori IIDA , Emi TSUTSUMI , Masanori TANAKA , Soichiro NIKATA
摘要： 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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公开(公告)号：US20240141230A1
公开(公告)日：2024-05-02
申请号：US18278261
申请日：2022-02-25
申请人： NS MATERIALS INC.
IPC分类号： C09K11/88
CPC分类号： C09K11/883
摘要： An object of the present invention is to provide a quantum dot and a method for manufacturing a quantum dot capable of enhancing the EQE. A method for manufacturing the quantum dot of the present invention includes steps of: generating a core and coating a shell on a surface of the core, wherein in the step of coating the shell, an acidic compound and a zinc halide compound are blended in a shell raw material. In the present invention, the step of coating the shell is divided into at least a first half and a second half. In the first half, a shell raw material in which the acidic compound is blended and the zinc halide compound is not blended is used, while in the second half, it is preferable that the shell is coated a plurality of times using the shell raw material in which both the acidic compound and the zinc halide compound are blended.
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公开(公告)号：US20210388263A1
公开(公告)日：2021-12-16
申请号：US17405687
申请日：2021-08-18
申请人： NS MATERIALS INC.
发明人： Yuko OGURA , Yuka TAKAMIZUMA , Kazunori IIDA , Emi TSUTSUMI , Masanori TANAKA , Soichiro NIKATA
摘要： 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：US20200212256A1
公开(公告)日：2020-07-02
申请号：US16633010
申请日：2018-07-27
申请人： NS MATERIALS INC.
发明人： Kazunori IIDA , Emi TSUTSUMI , Yuko OGURA , Masanori TANAKA , Soichiro NIKATA , Yuka TAKAMIZUMA
IPC分类号： H01L33/06 , H01L33/50 , G02F1/13357 , B82Y15/00 , B82Y40/00
摘要： 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：US20240360360A1
公开(公告)日：2024-10-31
申请号：US18273976
申请日：2021-01-28
发明人： Masaki YAMAMOTO , Kazuki GOTO , HIROHISA YAMADA , MASAYA UEDA , Yuko OGURA , Masanori TANAKA , Mikihiro TAKASAKI , Yuka TAKAMIZUMA , Soichiro NIKATA , Tetsuji ITO , Mayuko WATANABE
IPC分类号： C09K11/88 , C09K11/02 , C09K11/56 , H10K50/115 , H10K50/87
CPC分类号： C09K11/883 , C09K11/02 , C09K11/565 , H10K50/115 , H10K50/87
摘要： 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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