Colloidal CdTe Nano Crystals Synthesis and Characterization; Final rept. 2007-2008

摘要

Synthesis of CdTe nano crystals (NCs) in uniform sizes and in good quality was performed in our nano lab and further characterized by absorption spectra, photoluminescence (PL), and atomic force microscopy (AFM). In this growth procedure, CdTe nano crystal band gap is strongly dependent on the growth time and not on the injection temperature or organic ligand concentration. This is very attractive because the nano crystal size can be easily controlled by the growth time only and is very attractive for large scale synthesis. The color of the solution changes from greenish yellow to light orange, then to deep orange and finally grayish black to black over a period of one hour.