Patent ID: 9073751
Filing Date: 2015-07-07
Classification: B82Y,C01B,C01P,C09K,H01L

Abstract:
1. A structure comprising a quantum dot, said structure made by: a) mixing an amphiphilic polymer dissolved in a non-coordinating solvent with a first precursor to produce a carboxylate precursor; b) mixing an excess amount of the carboxylate precursor with a second precursor to form a quantum dot core; c) mixing the quantum dot core and the excess amount of the carboxylate precursor with a precursor selected from the group consisting of: a third precursor, a fourth precursor, and a combination thereof, to form a quantum dot cap on the quantum dot core to form a quantum dot, wherein the quantum dot includes a layer of amphiphilic polymer disposed on the surface of the quantum dot and attached to the quantum dot by interaction through carboxyl groups of the carboxylate precursor, said amphiphilic polymer having hydrophobic multidentate ligands extending from the quantum dot; and (d) contacting the quantum dot generated in step (c) and the excess amount of the carboxylate precursor with water to generate an outer layer of amphiphilic polymer moieties disposed on the quantum dot generated in step (c) by a hydrophobic interaction between the multidentate ligands extending from the quantum dot and from the excess carboxylate precursor, said outer layer having hydrophilic carboxyl groups exposed at the outer surface of the structure.