Organic Synthesis of Highly Luminescent CdSe Quantum Dot

We report the synthesis of high quality organically soluble cadmium selenide nanocrystals. This method involves the reduction of selenium powder to produce selenide ions which act as the Selenide source, followed by the addition of cadmium acetate. The nanoparticles were passivated with organic surfactants such as hexadecy-lamine (HDA) and tri-octylphosphine oxide (TOPO), for their solubility and stability in organic solvents. The high quality of the as-synthesized nanoparticles was confirmed using absorption (UV-Vis) spectroscopy and photoluminescence spectroscopy (PL), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Scanning electron microscopy (SEM). The band gap 3.45 eV of CdSe nanocrystals, effective mass approximation and photoluminescence blue shift further confirm the narrow size of particles.