▎ 摘　　要

NOVELTY - Sieving quantum dot comprises dispersing initial quantum dot with organic ligand connected to its surface in a first solvent to obtain an initial quantum dot solution, gradually adding insoluble solvent into the initial quantum dot solution and mixing, gradually precipitating the initial quantum dots in the order of particle size from large to small, and collecting the precipitate in sections according to the time sequence, obtaining the sieved quantum dot, where the insoluble solvent is miscible with the first solvent and immiscible with the organic ligand. USE - The method is useful for sieving quantum dot. ADVANTAGE - The quantum dot has uniform size as the quantum dot light-emitting layer material, and can effectively improve the photoelectric performance of the quantum dot light-emitting diode. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a quantum dot light-emitting diode comprising a cathode, an anode, and a quantum dot light-emitting layer disposed between the cathode and the anode, and the quantum dot light-emitting layer material is the quantum dot sieved material.