Abstract: CdSe colloid nanocrystals with a High luminescence quality were synthesized by the reaction of CdO and Se precursors at a high temperature. In this experiment,three kinds of sizes of CdSe nanocrystals were obtained by changing the amount of hexadecyl amine in the system. With TEM,XRD and fluorescence emission spectra,we characterized the morphology,structure and optical quality. The results indicate that hexadecyl amine has so great effect on the size of nanocrystals that the size of CdSe nanocrystal increases with increasing the amount of hexadecyl amine

Key words: CdO, High temperature reaction, Hexadecyl amine, CdSen anocrystals