公开(公告)号：US20240318076A1

公开(公告)日：2024-09-26

申请号：US18527566

申请日：2023-12-04

申请人： NS MATERIALS INC.

发明人： Toshiaki SHIMASAKI

IPC分类号： C09K11/88 ,  B82Y20/00 ,  B82Y40/00 ,  C01B19/00 ,  C09K11/02 ,  C09K11/58 ,  C09K11/62

CPC分类号： C09K11/881 ,  C01B19/002 ,  C09K11/025 ,  C09K11/582 ,  C09K11/621 ,  B82Y20/00 ,  B82Y40/00 ,  C01P2002/72 ,  C01P2004/04 ,  C01P2004/64

摘要： A method for producing a quantum dot that includes synthesizing a quantum dot represented by AgInE2 (E is at least one of tellurium, selenium, and sulfur) from a silver raw material, an indium raw material, and a chalcogenide raw material (chalcogenide is at least one of tellurium, selenium, and sulfur).

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

IPC分类号： C09K11/88 ,  C09K11/02 ,  F21V9/30

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.

公开(公告)号：US20240079518A1

公开(公告)日：2024-03-07

申请号：US18268487

申请日：2021-12-24

申请人： NS MATERIALS INC.

发明人： Akio MISHIMA ,  Soichiro NIKATA ,  Vit KALOUSEK ,  Toshiaki SHIMASAKI ,  Yuko OGURA ,  Mikihiro TAKASAKI ,  Shogo UEDA ,  Yuya ASHIMURA

IPC分类号： H01L33/06 ,  H01L33/00

CPC分类号： H01L33/06 ,  H01L33/005

摘要： 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.

公开(公告)号：US11834596B2

公开(公告)日：2023-12-05

申请号：US17257074

申请日：2020-07-31

申请人： NS Materials Inc.

发明人： Soichiro Nikata ,  Yoko Michiwaki ,  Tomoaki Hieda ,  Yuko Ogura ,  Akio Mishima ,  Vit Kalousek

IPC分类号： C09K11/88 ,  C01G15/00 ,  B82Y20/00 ,  B82Y40/00

CPC分类号： C09K11/883 ,  C01G15/006 ,  B82Y20/00 ,  B82Y40/00 ,  C01P2004/64 ,  C01P2006/60

摘要： 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

公开(公告)号：US20230203366A1

公开(公告)日：2023-06-29

申请号：US18116105

申请日：2023-03-01

申请人： NS MATERIALS INC.

发明人： Kazunori IIDA ,  Emi TSUTSUMI ,  Mika NIWAKI ,  Jun KANENO ,  Soichiro NIKATA ,  Hidetoshi TANAKA

IPC分类号： C09K11/02 ,  B29C48/00 ,  B29C48/08 ,  B29C48/21 ,  B32B27/20 ,  B32B27/30 ,  B32B27/32 ,  B32B27/36 ,  C08J5/18

CPC分类号： C09K11/02 ,  B29C48/08 ,  B29C48/21 ,  B29C48/022 ,  B32B27/20 ,  B32B27/36 ,  B32B27/308 ,  B32B27/325 ,  C08J5/18 ,  B29K2023/38

摘要： To provide a quantum dot-containing resin sheet or film, a method for producing the same, and a wavelength conversion member that can, in particular, solve the problem of aggregation of the quantum dots and the problem with the use of a scattering agent, suppress a decrease in light conversion efficiency, and improve the light conversion efficiency of a resin molded product containing quantum dots. The quantum dot-containing resin sheet or film of the present invention includes a stack of a plurality of resin layers, at least one of the resin layers containing quantum dots, and the plurality of resin layers is integrally molded through co-extrusion.

公开(公告)号：US11629288B2

公开(公告)日：2023-04-18

申请号：US16754995

申请日：2018-10-15

申请人： NS MATERIALS Inc.

发明人： Kazunori Iida ,  Emi Tsutsumi ,  Mika Niwaki ,  Jun Kaneno ,  Soichiro Nikata ,  Hidetoshi Tanaka

IPC分类号： B32B27/20 ,  C09K11/02 ,  B29C48/00 ,  B29C48/08 ,  B29C48/21 ,  B32B27/30 ,  B32B27/32 ,  B32B27/36 ,  C08J5/18 ,  B29K23/00 ,  B29K33/00 ,  B29K67/00 ,  B29K105/16 ,  B82Y20/00 ,  B82Y40/00

摘要： To provide a quantum dot-containing resin sheet or film, a method for producing the same, and a wavelength conversion member that can, in particular, solve the problem of aggregation of the quantum dots and the problem with the use of a scattering agent, suppress a decrease in light conversion efficiency, and improve the light conversion efficiency of a resin molded product containing quantum dots. The quantum dot-containing resin sheet or film of the present invention includes a stack of a plurality of resin layers, at least one of the resin layers containing quantum dots, and the plurality of resin layers is integrally molded through co-extrusion.

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.

发明人： Soichiro NIKATA ,  Yuko OGURA ,  Mikihiro TAKASAKI ,  Yuka TAKAMIZUMA

IPC分类号： C09K11/88 ,  C01B19/04

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.

公开(公告)号：US10656319B2

公开(公告)日：2020-05-19

申请号：US14770909

申请日：2014-01-28

申请人： NS MATERIALS INC.

发明人： Shingo Kokudo ,  Eiichi Kanaumi

IPC分类号： F21V8/00 ,  G02F1/1335 ,  G02F1/13357

摘要： There is provided a high-efficiency and high-definition liquid crystal display device in which a white light source is constituted by using a fluorescent substance composed of a quantum dot having a minute particle size, and an LED light-emitting element, light from the light source is allowed to be incident from one lateral surface of a backlight provided on a rear surface of the liquid crystal display device, and thus an amount of the quantum dot fluorescent substance that is used is reduced, and the thickness of the liquid crystal display device is made smaller as a whole.

公开(公告)号：US10598843B2

公开(公告)日：2020-03-24

申请号：US15522398

申请日：2015-10-27

申请人： NS MATERIALS INC.

发明人： Akiharu Miyanaga ,  Eiichi Kanaumi ,  Shingo Kokudo

IPC分类号： F21V8/00 ,  C09K11/00 ,  F21S2/00 ,  H01L33/50 ,  F21V9/30 ,  C09K11/02 ,  C09K11/88 ,  F21Y115/10

摘要： To provide a wavelength converting member that allows for improved yield, in which air bubbles can be prevented from being left in a resin containing a wavelength converting material; a light emitting device, a light emitting element, a light source unit, a display device, and a light guide member using the wavelength converting member; and a method of producing the wavelength converting member. A wavelength converting member has a receptacle provided with a receiving space; and a molding containing a wavelength converting material, placed in the receiving space. This allows air bubbles from being left in the wavelength converting material and improves the yield.

公开(公告)号：US10422937B2

公开(公告)日：2019-09-24

申请号：US15522362

申请日：2015-10-27

申请人： NS MATERIALS INC.

发明人： Akiharu Miyanaga ,  Shingo Kokudo ,  Eiichi Kanaumi ,  Tetsuji Ito ,  Yoshikazu Nageno

IPC分类号： F21V8/00 ,  H01L33/50

摘要： To provide a wavelength converting member in which the occurrence of blackening can be suppressed compared to the prior art; and a light emitting device, a light emitting element, a light source unit, and a display device using the wavelength converting member. The wavelength converting member includes: a receptacle including a light entrance plane and a light exit plane opposite to the light entrance plane and provided with a receiving space inside the light entrance plane and the light exit plane; and a wavelength conversion layer having quantum dots that is placed in the receiving space. The distance between the light entrance plane and the wavelength conversion layer is longer than the distance between the light exit plane and the wavelength conversion layer.