Ligand Effects on Optical Properties of CdSe Nanocrystals

Gregory Kalyuzhny and Royce W. Murray*
Kenan Laboratories of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599
J. Phys. Chem. B, 2005, 109 (15), pp 7012–7021
DOI: 10.1021/jp045352x
Publication Date (Web): March 22, 2005
Copyright © 2005 American Chemical Society
*

 Corresponding author. E-mail:  rwm@email.unc.edu.

Abstract

We report effects of various organic and inorganic ligands on optical properties of CdSe nanocrystals (NCs) by changes in their photoluminescence and absorbance spectra. Surface ligand loss occurring during dilution and purification of solutions of CdSe NCs leads to a decrease of photoluminescence intensity. The complex of trioctylphosphine with Se atoms on the surface of CdSe NCs is found responsible for the trap emission band that is red-shifted relative to the photoluminescence band edge.

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History

  • Published In Issue April 21, 2005
  • Received October 11, 2004
    Revised January 21, 2005

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