Patent ID: 9448498
Filing Date: 2016-09-20
CPC Classification: G03G

Claim Text:
1. A method of forming a quantum dot photoconductor (QDPC) material comprising surface modified quantum dots (QDs) for an electrophotographic device comprising: replacing a first ligand capping layer of QDs with a second ligand capping layer through chemical reflux on QDs in an exchange medium to create partially ligand-exchanged QDs, wherein ligands in the first ligand cappying layer are non-volatile ligands and ligands in the second ligand capping layer are semi-volatile ligands and wherein the exchange medium is a semi-volatile liquid; removing free non-volatile ligands; storing the partially ligand-exchanged QDs in the exchange medium for a period of time to achieve a pre-determined exchange level; and removing additional free non-volatile ligands.