US 12,435,265 B2
Quantum dot composition, light-emitting element and display device including the same
Jaekook Ha, Seoul (KR); and Yunku Jung, Cheonan-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-si (KR)
Filed on Oct. 20, 2021, as Appl. No. 17/451,602.
Claims priority of application No. 10-2020-0176928 (KR), filed on Dec. 17, 2020.
Prior Publication US 2022/0195289 A1, Jun. 23, 2022
Int. Cl. C09K 11/02 (2006.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01); H10K 50/115 (2023.01); H10K 59/38 (2023.01)
CPC C09K 11/025 (2013.01) [H10K 50/115 (2023.02); H10K 59/38 (2023.02); B82Y 20/00 (2013.01); B82Y 40/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A quantum dot composition comprising:
a quantum dot;
a first ligand represented by Formula A or Formula B; and
a second ligand bonded to a surface of the quantum dot and being shorter in length than the first ligand:

OG Complex Work Unit Chemistry
wherein, in Formula A and Formula B,
X, X1, and X2 are each independently S or NH,
* is a position to which the quantum dot binds, and
Y is represented by any one of Formulae 1 to 7:

OG Complex Work Unit Chemistry
wherein, in Formulae 1 to 7,

OG Complex Work Unit Chemistry
 means a position connected to the X, X1 or X2, and
R1 and R2 are each independently an alkyl group having 1 to 20 carbon atoms, where the sum of carbon atoms of R1 and R2 is 20 or less.