US 12,389,724 B2
Method for producing semiconductor nanoparticles and light-emitting device
Tsukasa Torimoto, Nagoya (JP); Tatsuya Kameyama, Nagoya (JP); Chie Miyamae, Nagoya (JP); Susumu Kuwabata, Ibaraki (JP); Taro Uematsu, Suita (JP); and Tomoya Kubo, Tokushima (JP)
Assigned to National University Corporation Tokai National Higher Education and Research System, Nagoya (JP); OSAKA UNIVERSITY, Suita (JP); and NICHIA CORPORATION, Anan (JP)
Filed by National University Corporation Tokai National Higher Education and Research System, Nagoya (JP); OSAKA UNIVERSITY, Suita (JP); and NICHIA CORPORATION, Anan (JP)
Filed on Mar. 7, 2022, as Appl. No. 17/653,868.
Claims priority of application No. 2021-036602 (JP), filed on Mar. 8, 2021; and application No. 2021-136452 (JP), filed on Aug. 24, 2021.
Prior Publication US 2022/0285589 A1, Sep. 8, 2022
Int. Cl. H10H 20/851 (2025.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01); H10H 20/01 (2025.01)
CPC H10H 20/8512 (2025.01) [B82Y 20/00 (2013.01); B82Y 40/00 (2013.01); H10H 20/0361 (2025.01)] 6 Claims
OG exemplary drawing
 
1. A method for producing semiconductor nanoparticles, comprising:
providing first semiconductor nanoparticles containing a semiconductor containing an element M1 being at least one element selected from the group consisting of Ag, Cu, Au and an alkali metal, and containing at least Ag, an element M2 being at least one element selected from the group consisting of Al, Ga, In and Tl, and containing at least one of In or Ga, and an element Z containing at least one element selected from the group consisting of S, Se and Te;
and
heat-treating a mixture containing the first semiconductor nanoparticles, a first compound having a Ga—S bond and being a Ga salt of a sulfur-containing compound selected from the group consisting of thiocarbamic acid, dithiocarbamic acid, thiocarbonate, dithiocarbonate (xanthogenic acid), trithiocarbonate, thiocarboxylic acid, dithiocarboxylic acid and derivatives thereof, a second compound containing Ga and not containing S, and an organic solvent to obtain second semiconductor nanoparticles.