	US 12,221,572 B2
	Light emitting core and shell nanoparticle
Elizaveta Kossoy, Rehovot (IL); Shany Neyshtadt, Jerusalem (IL); Sanaa Khalil, Jerusalem (IL); Alex Rabkin, Jerusalem (IL); and Jessica Benjamini Ettedgui, Rockville, MD (US)
Assigned to MERCK PATENT GMBH, Darmstadt (DE)
Appl. No. 17/606,265
Filed by MERCK PATENT GMBH, Darmstadt (DE)
PCT Filed Apr. 23, 2020, PCT No. PCT/EP2020/061262 § 371(c)(1), (2) Date Oct. 25, 2021, PCT Pub. No. WO2020/216813, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 19171350 (EP), filed on Apr. 26, 2019.
Prior Publication US 2022/0298411 A1, Sep. 22, 2022
Int. Cl. C09K 11/02 (2006.01); B82Y 40/00 (2011.01); C09K 11/54 (2006.01); C09K 11/70 (2006.01); C09K 11/88 (2006.01); H10K 50/115 (2023.01)

CPC C09K 11/025 (2013.01) [B82Y 40/00 (2013.01); C09K 11/54 (2013.01); C09K 11/70 (2013.01); C09K 11/883 (2013.01); H10K 50/115 (2023.02)]

23 Claims

1. A semiconducting light-emitting nanoparticle comprising:

a core;

an outer layer covering at least a part of said core, comprising a metal cation and a divalent anion; and

one or more types of organic moieties directly attached to the anion of the outer layer by covalent bond,

wherein said divalent anion is selected from Se²⁻, S²⁻, Te²⁻ O²⁻ or a combination of any of these, and said metal cation is a monovalent, divalent, trivalent, or tetravalent cation, and

wherein the organic moiety is represented by formula (III) or formula (IIIa)

*—(CH₂)_a—(OCH₂CH₂)_p—(V)_r—(CH₂)_q—Z (III)

*—(CH₂)_q—(V)_r—(OCH₂CH₂)_p—Z (IIIa)

wherein

V is O, CH₂or C═O;

Z is a hydrogen atom or an organic group;

a is 0 or an integer 1 or more;

p is an integer 1 or more;

q is 0 or an integer 1 or more;

r is 0 or an integer 1; and

“*” represents the connecting point to the anion in the outer layer.