Synthesis and Characterization of the Water-Soluble ZnSe:Fe/ZnS Core/Shell Quantum Dots

DOI

10.2991/cmfe-15.2015.74How to use a DOI?

Keywords

ZnSe:Fe/ZnS core/shell quantum dots; L-cysteine; synthesis; water-soluble; fluorescene

Abstract

The synthesis and fluorescence properties of water-soluble ZnSe:Fe/ZnS core/shell quantum dots with L-cysteine as the stabilizer in aqueous solution are reported in this paper. The structure, component and fluorescence properties of quantum dots were characterized by X-ray powder diffraction (XRD),infrared spectrum(IR),UV-Vis absorption spectrum and photoluminescence(PL). XRD studies present that the L-cysteine modified ZnSe:Fe/ZnS core/shell quantum dots have a cubic zinc-blende structure. The photoluminescence emission intensity of the L-cysteine modified ZnSe:Fe/ZnS core/shell quantum dots is enhanced by coating ZnS shell on the surface of core d-dots. The PL intensity of the ZnSe:Fe/ZnS core/shell quantum dots increase at the beginning and decrease with further growth of the ZnS shell, which achieve the maximum when nshell/ncore=0.75:1. After doped with Fe2+ and coated with ZnS shell, the fluorescence quantum yields of the as prepared quantum dots increased from 10.83 % to 18.70%

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chunting Bo
AU  - Fenghua Huang
AU  - Peifeng Chen
AU  - Wei Guo
PY  - 2015/07
DA  - 2015/07
TI  - Synthesis and Characterization of the Water-Soluble ZnSe:Fe/ZnS Core/Shell Quantum Dots
BT  - Proceedings of the International Conference on Chemical, Material and Food Engineering
PB  - Atlantis Press
SP  - 310
EP  - 313
SN  - 2352-5401
UR  - https://doi.org/10.2991/cmfe-15.2015.74
DO  - 10.2991/cmfe-15.2015.74
ID  - Bo2015/07
ER  -