US 12,391,879 B2
Quantum dot-containing complex, ink composition including the same, light-emitting device including the same, and electronic apparatus including the same
Jaebok Chang, Yongin-si (KR); Kyungsig Lee, Yongin-si (KR); and Seunghee Jang, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Nov. 16, 2022, as Appl. No. 17/988,630.
Claims priority of application No. 10-2021-0181030 (KR), filed on Dec. 16, 2021.
Prior Publication US 2023/0193129 A1, Jun. 22, 2023
Int. Cl. C09K 11/88 (2006.01); B82Y 20/00 (2011.01); C09D 5/22 (2006.01); C09K 11/02 (2006.01); H10H 20/851 (2025.01); H10K 50/115 (2023.01)
CPC C09K 11/883 (2013.01) [C09D 5/22 (2013.01); C09K 11/02 (2013.01); H10H 20/8512 (2025.01); H10K 50/115 (2023.02); B82Y 20/00 (2013.01)] 20 Claims
 
1. A quantum dot-containing complex comprising:
a quantum dot; and
a first ligand and a second ligand, each coordinate a surface of the quantum dot,
wherein the first ligand is a hydrocarbon compound comprising a hydrophilic moiety and a lipophilic moiety and has an aspect ratio of 5 or greater,
the second ligand is a hydrocarbon compound comprising a hydrophilic moiety and a lipophilic moiety and has an aspect ratio of 4 or less, and
a hydrophile-lipophile balance (HLB) of the first ligand and an HLB of the second ligand are each independently 7 or greater,
wherein the aspect ratio and HLB are calculated as following:
aspect ratio=ligand length/ligand width
Davies' Equation:

OG Complex Work Unit Math
wherein in Davies' Equation,
m=number of hydrophilic moieties in a ligand molecule,
Hi=coefficient of ith hydrophilic moiety, and
n=number of lipophilic moieties in the ligand molecule.