Method species nanocrystals

The present invention provides a method of preparing nano-crystal species, belonging to the technical field of manufacturing a semiconductor nanomaterials. By the present invention, the plurality of close control of process conditions in the temperature range of 100-300 deg.] C, the reaction gas is first dissolved precursor solution was added to the precursor solution by dissolving a second precursor and a second surfactant in the reaction to obtain nanocrystals prepared. Prepared by the method of the present invention, the amount of the gaseous precursor may be precisely controlled, the reaction is more uniform and controllable, the prepared nanocrystals volume distribution, higher light emission quantum yield.