Synthesis and Optical Properties of CdSe and CdSe/ZnS Core/Shell Quantum Dots

Puspendu Barik, Arup Ratan Mandal, Denis Kuznetsov, Anna Godymchuk
  • Advanced Materials Research, February 2015, Trans Tech Publications
  • DOI: 10.4028/www.scientific.net/amr.1085.176

CdSe and CdSe/ZnS Core/Shell

What is it about?

In this work, we have synthesized homogeneous, ordered CdSe and CdSe/ZnS core/shell quantum dots (QDs) by chemical route and characterized them using X-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS), and Photoluminescence (PL) spectroscopy. Coating with shell material was confirmed by red shift as well as enhancement in the PL peak compared to bare QDs. DLS data showed QDs and core/shell to be stable. PL spectra are red shifted relative to the excitation wavelength. Bare QDs and the core/shell material shows a Stoke-shift of 16 and 18 meV respectively.

The following have contributed to this page: Dr. Puspendu Barik, Dr. Anna Godymchuk, and Dr Denis Kuznetsov