PREPARATION METHOD FOR CDSE NANOCRYSTAL

摘要

Provided is a preparation method for CdSe nanocrystals, comprising steps of: S1, dissolving Se powder in Na₂SO₃ solution, and heating to fully dissolve the Se powder to obtain Na₂SeSO₃ solution; S2, dissolving a cadmium salt and a stabilizer mercaptoacetic acid in an aqueous solution, adding the Na₂SeSO₃ solution to form a sol, and then heating the sol and carrying out refluxing and cooling; S3, adding acetone to the cooled sol to obtain a precipitate, and performing centrifugal separation to obtain CdSe nanocrystals; and S4, wet-processing the CdSe nanocrystals by using CdCl₂. The method wet-processes the CdSe nanocrystals using CdCl₂, thus improving crystallinity and reducing defect density; and the method can be widely used in electroluminescent devices to improve service life.