SINGLE-SOURCE MOLECULAR PRECURSORS FOR THE DEPOSITION OF ZINC SELENIDE QUANTUM DOTS

TOPO (tri-n-octylphosphine oxide)-capped ZnSe (in the form of close to mono-dispersed nanoparticles) has been prepared by a single source ro ute using ethyl(diethyldiselenocarbamato)zinc(Ir) as a precursor. The nanoparticles obtained show quantum size effects in their optical spec tra and exhibit near band-edge luminescence. A blue shift of 0.25 eV i n relation to the bulk material is observed. The selected area electro n diffraction (SAED) and X-ray diffraction (XD) patterns show the mate rial to be hexagonal. The crystallinity of the material was also evide nt from high-resolution transmission electron microscopy (HRTEM) which gave well defined images of nanosize particles with clear lattice fri nges.