ABSTRACT
One-dimensional Mn(2+)-doped CdS nanocrystals were synthesized by the hydrothermal route. The products were characterized by SEM, EDS, XRD, TEM, HRTEM and PL, respectively. The results revealed that dopant Mn2+ completely substitutes Cd2+ in CdS nanocrystals, and the product was of good crystallite. Further more, a complete suppression of the emission from surface states at room temperature when doping with ions Mn2+ has been observed.
Subject(s)
Cadmium Compounds/chemistry , Luminescence , Manganese/chemistry , Nanoparticles/chemistry , Sulfides/chemistry , Hot Temperature , Luminescent Measurements/methods , Microscopy, Electron, Scanning , Microscopy, Electron, Transmission , Nanoparticles/ultrastructure , Spectrophotometry , Water/chemistry , X-Ray DiffractionABSTRACT
Polyvinylpyrrolidone (PVP)-modified CdS nanorods were prepared by a hydrothermal reaction of CdCl2 2.5H2O and (NH4)2S with 10 wt% ethylenediamine aqueous solution as solvent and 1.0 wt% PVP as additives. The obtained products were characterized by means of XRD, TEM, IR, DTA-TG, UV-Vis and PL spectroscopies. The surface-modified CdS nanorods showed narrow size distribution and enhanced luminescence property compared with that of the unmodified ones. The UV-Vis spectra exhibited a structure peak. These results were attributed to the surface passivation of the CdS nanorods by the PVP molecules.
