US 12,421,451 B2
Quantum dot and method for producing the same
Toshiaki Shimasaki, Fukuoka (JP)
Assigned to TOPPAN INC., Tokyo (JP)
Filed by TOPPAN INC., Tokyo (JP)
Filed on Dec. 4, 2023, as Appl. No. 18/527,566.
Application 18/527,566 is a continuation of application No. 17/765,226, granted, now 11,873,436, previously published as PCT/JP2020/036590, filed on Sep. 28, 2020.
Claims priority of application No. 2019-183077 (JP), filed on Oct. 3, 2019.
Prior Publication US 2024/0318076 A1, Sep. 26, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 11/88 (2006.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01); C01B 19/00 (2006.01); C09K 11/02 (2006.01); C09K 11/58 (2006.01); C09K 11/62 (2006.01)
CPC C09K 11/881 (2013.01) [C01B 19/002 (2013.01); C09K 11/025 (2013.01); C09K 11/582 (2013.01); C09K 11/621 (2013.01); B82Y 20/00 (2013.01); B82Y 40/00 (2013.01); C01P 2002/72 (2013.01); C01P 2004/04 (2013.01); C01P 2004/64 (2013.01)] 2 Claims
 
1. A method for producing a quantum dot, the method comprising:
synthesizing a quantum dot represented by AgInE2 (E is at least one of tellurium, and selenium, and sulfur) from a silver raw material, an indium raw material, and a chalcogenide raw material (chalcogenide is at least one of tellurium, and selenium, and sulfur) by:
sequentially dissolving one or two of
the silver raw material,
the indium raw material,
the chalcogenide raw material, and
a ligand
in a high-boiling point solvent heated from 60° C. to 120° C., the high-boiling solvent having a boiling point of at least 150° C.;
after the dissolving, sequentially adding the remaining raw materials among the silver raw material, the indium raw material, the chalcogenide raw material and the ligand to form a solution; and
synthesizing the quantum dot by raising the temperature of the solution to a reaction temperature of 180° C. or higher and 250° C. or lower, after adding all the raw materials and ligand.