Synthesis and luminescent properties of nanocrystals in the core/shell
Abstract
On the basis of a semiconductor material, a hybrid CdSe/ZnS quantum-sized (1-10 nm) hybrid of cadmium selenide with a “core-shell” structure was synthesized. The absorption and luminescence spectra of quantum dots were studied and quantum yield was calculated theoretically. The values of the theoretical and experimental dimensions of CdSe nanocrystals were studied comparatively. Optimal temperature conditions for efficient synthesis were determined. CdSe quantum dots stabilized with oleic acid were obtained by the colloidal method and their optical properties were studied. By growing a ZnS shell onto the surface of CdSe nanoparticles, CdSe/ZnS core-shell hybrid QDs are synthesized. Ligand exchange reactions were carried out under mild conditions using an excess amount of a thiol stabilizer. The fact of the replacement of stabilizers was established by IR spectroscopy.
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