US 12,074,253 B2
Semiconductor nanoparticles, production method thereof, and light-emitting device
Susumu Kuwabata, Ibaraki (JP); Taro Uematsu, Suita (JP); Kazutaka Wajima, Toyonaka (JP); Tsukasa Torimoto, Nagoya (JP); Tatsuya Kameyama, Nagoya (JP); and Daisuke Oyamatsu, Tokushima (JP)
Assigned to OSAKA UNIVERSITY, Osaka (JP); National University Corporation Tokai National Higher Education and Research System, Nagoya (JP); and NICHIA CORPORATION, Anan (JP)
Filed by OSAKA UNIVERSITY, Osaka (JP); National University Corporation Tokai National Higher Education and Research System, Nagoya (JP); and NICHIA CORPORATION, Anan (JP)
Filed on Nov. 7, 2022, as Appl. No. 18/053,057.
Application 18/053,057 is a division of application No. 16/970,329, granted, now 11,532,767, previously published as PCT/JP2019/005616, filed on Feb. 15, 2019.
Claims priority of application No. 2018-025435 (JP), filed on Feb. 15, 2018; and application No. 2018-196802 (JP), filed on Oct. 18, 2018.
Prior Publication US 2023/0120918 A1, Apr. 20, 2023
Int. Cl. H01L 33/26 (2010.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01); H01L 33/00 (2010.01); H01L 33/50 (2010.01)
CPC H01L 33/26 (2013.01) [B82Y 20/00 (2013.01); B82Y 40/00 (2013.01); H01L 33/005 (2013.01); H01L 33/50 (2013.01)] 11 Claims
OG exemplary drawing
 
1. Core-shell semiconductor nanoparticles, each comprising:
a core; and
a shell disposed on a surface of the core, and
emitting light when irradiated with light,
wherein the core contains Ag, at least one of In and Ga, and S,
the shell contains a semiconductor essentially composed of a Group 13 element and a Group 16 element, and having a greater band-gap energy than the core,
the core-shell semiconductor nanoparticles have an essentially tetragonal crystal structure, and an emission peak with a half bandwidth of 70 nm or less, and
a compound containing a Group 15 element disposed on a surface of the shell, and the Group 15 element contains at least P with a negative oxidation number.