US 10,892,433 B2
Quantum dot light emitting device including ligand-substituted quantum dot light emitting layer with polymer having amine groups and method for fabricating the same
Jinhan Cho, Seoul (KR); Wan Ki Bae, Seoul (KR); and Ikjun Cho, Seoul (KR)
Assigned to Korea University Research and Business Foundation, Seoul (KR); and Korea Institute of Science and Technology, Seoul (KR)
Filed by Korea University Research and Business Foundation, Seoul (KR); and Korea Institute of Science and Technology, Seoul (KR)
Filed on Jun. 2, 2017, as Appl. No. 15/612,768.
Claims priority of application No. 10-2016-0069720 (KR), filed on Jun. 3, 2016.
Prior Publication US 2017/0352827 A1, Dec. 7, 2017
Int. Cl. H01L 51/50 (2006.01); H01L 51/56 (2006.01); H05B 33/14 (2006.01); H01L 31/0352 (2006.01); C09K 11/67 (2006.01); C09K 11/88 (2006.01); H01L 51/00 (2006.01)
CPC H01L 51/502 (2013.01) [C09K 11/672 (2013.01); C09K 11/883 (2013.01); H01L 31/035218 (2013.01); H01L 51/0034 (2013.01); H01L 51/5072 (2013.01); H01L 51/56 (2013.01); H05B 33/14 (2013.01); H01L 51/5012 (2013.01); H01L 2251/303 (2013.01); H01L 2251/305 (2013.01); H01L 2251/306 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A quantum dot light emitting device comprising:
an electron transport layer;
a polymer layer having amine groups coated on the electron transport layer; and
a quantum dot light emitting layer formed by coating quantum dots on the polymer layer;
wherein the quantum dots have surface oleic acid ligands,
wherein at least part of the quantum dot surface oleic acid ligands in contact with the polymer are ligand-substituted with said amine groups,
wherein said polymer is a dendrimer,
wherein said amine groups are positioned at branch terminus of the dendrimer,
wherein said dendrimer is a generation 3 or 4 dendrimer, and
wherein the quantum dots are bonded to said amine groups of the dendrimer by ligand substitution.