One-pot synthesis and characterization of high-quality CdSe/ZnX (X=S, Se) nanocrystals via the CdO precursor
نویسندگان
چکیده
We report on the synthesis of CdSe/ZnX (X=S, Se) core/shell quantum dots from the CdO precursor through a convenient, one-pot approach. The defocusing stage (i.e., Ostwald Ripening) can be finely controlled to prepare nearly monodispersive core/shell quantum dots. The resulting particles have been characterized by their corresponding optical properties, energy dispersive spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy and powder XRD. This method is highly reproducible, and quantum efficiencies as high as 0.7 can be achieved. r 2004 Elsevier B.V. All rights reserved. PACS: 81.05.Dz; 79.60.Jv; 81.65.Rv; 81.10.Dn
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