| abstract |
The present application provides a method for preparing core-shell quantum dots, comprising the steps of: adding cation precursors to a first mixed solution containing quantum dots, and a second mixed solution containing anion precursors, cation precursors and anion precursors The reaction is that the quantum dots coat the shell layer to obtain the core-shell structure quantum dots, wherein, the anion precursor is selected from at least one of the compounds of the following structural formula, Wherein, A is selected from Se or S; R 1 to R 12 are each independently selected from H, or a C1-C22 alkane chain, or a C1-C22 alkene chain, or a C5-C22 aromatic hydrocarbon chain. In the present application, an anion precursor with high reactivity is reacted with a cation precursor, and a shell layer with uniform composition and high quality is coated for the quantum dot, thereby improving the fluorescence quantum yield of the quantum dot. |