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One-pot synthesis and characterization of high-quality CdSe/ZnX (X=S, Se) nanocrystals via the CdO precursor

Authors
Journal
Journal of Crystal Growth
0022-0248
Publisher
Elsevier
Publication Date
Volume
265
Identifiers
DOI: 10.1016/j.jcrysgro.2004.01.064
Keywords
  • A1. Low Dimensional Structures
  • B1. Nanomaterials
  • B2. Semiconducting Ii–Vi Materials
Disciplines
  • Physics

Abstract

Abstract 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.

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