. Methods for purification and solvent substitution of quantum dots and quantum dots prepared using the same.

摘要

An embodiment of the present invention comprises the steps of preparing a quantum dot dispersion in which a quantum dot is mixed in a first solvent, and transversely filtering the dispersion along a surface of the first filter membrane having a first void to be discharged to the lower surface of the first filter membrane. Collecting a first filtrate containing quantum dots and cross-filtering the first filtrate along a second filter membrane surface having a second void to collect a second filtrate containing quantum dots discharged into the cross flow It is to provide a method for purifying a quantum dot dispersion comprising a. More specifically, the present invention relates to a method of manufacturing a quantum dot of uniform size using a cross-flow filtration method of the present invention, purifying and solvent-substituting the quantum dot dispersion and using the same.