Hexagonal zinc sulfide nanocrystals coated by esters with a well-defined exciton feature

Abstract

Hexagonal zinc sulfide nanocrystals (ZnS NCs) were prepared under mild solvothermal condition at 170 °C with the polymer ester used as ligand for their stability and effective passivation. Well-defined absorption peaks with the largest blueshift of 89 nm were observed for the ZnS NCs based on the ultraviolet-visible (UV-vis) absorption spectra analyses compared with that of the bulk one, which are in correspondence with the apparent quantum confinement effects. Well excited states were obtained from UV-vis absorption and photoluminescent excitation (PLE) spectra for the ZnS NCs. PL emission spectra showed dominant band-edge luminescence. © 2006 American Institute of Physics.