| abstract |
Disclosed in the present application is a method for preparing a core-shell quantum dot. The method for preparing the core-shell quantum dot comprises the following steps: providing an initial quantum dot containing a first cation; mixing the initial quantum dot with a precursor of a second cation and a precursor of a third cation to form a mixed system, the precursor of the second cation being used to form a shell layer, and the third cation being used to promote the outward diffusion of the first cation; adding into the mixed system an anion precursor used for forming the shell layer, and the anion precursor reacting with the precursor of the second cation and the first cation diffused from the initial quantum dot to form an alloy shell layer, so as to prepare the core-shell quantum dot. In the core-shell quantum dot obtained in the present application, the shell layer has a high degree of alloying, which is more conducive to obtaining a core-shell quantum dot having a short fluorescence emission wavelength; the synthesis method of the core-shell quantum dot is simple, the repeatability is good, and the reaction time is short. |