Synthesis, Characterization and Optical Properties of ZnSe Nanoparticles

摘要

The chemical co-precipitation method was employed to synthesize zinc selenide (ZnSe) nanoparticles with the help of Selenium powder, sodium borohydride, zinc acetate. Mercaptoethanol was added as capping agent. The XRD, SEM and TEM techniques were employed for the characterization of ZnSe nanoparticles. The average diameter of ZnSe nanoparticles is 15 nm. HR transmission electron microscopy (HRTEM) image displays the crystalline features of ZnSe nanoparticles. The PL emission spectrum indicates a peak centered at 480 nm along with two shoulders at 453 and 520 nm. The blue shift is also observed in the PL emission spectrum of ZnSe nanoparticles as compared to bulk ZnSe due to the quantum confinement, which is caused by direct band to band transition. Raman peaks at 210 cm~(-1) is assigned to the TO phonon modes of ZnSe phase, that correspond with the reported results for ZnSe.