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Green synthesis of CdSe/ZnS core-shell quantum dot nanophosphors and its Poly methyl methacrylate composite thin film in the visible spectral range

Published online by Cambridge University Press:  10 February 2015

Sneha Mohan ,
Theertha Soman ,
Samuel. O. Oluwafemi ,
Soney. C. George ,
Patrice Miska ,
Didier Rouxel ,
Nandakumar Kalarikkal  and
Sabu Thomas
Sneha Mohan
Affiliation:
Department of Chemistry, Cape-Peninsula University of Technology, P.O. Box 652, Capetown, 8000, South Africa. International and Interuniversity Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala- 686560, India.
Theertha Soman
Affiliation:
International and Interuniversity Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala- 686560, India.
Samuel. O. Oluwafemi*
Affiliation:
Department of Chemistry, Cape-Peninsula University of Technology, P.O. Box 652, Capetown, 8000, South Africa.
Soney. C. George
Affiliation:
Amal Jyothi College of Engineering, Kanjirappally, Kottayam, Kerala- 686560.
Patrice Miska
Affiliation:
Université de Lorraine, Institut Jean Lamour, Vandoeuvre-lès-Nancy, F-54500, France. CNRS, UMR 7198, Vandoeuvre-lès-Nancy, F-54500, France.
Didier Rouxel
Affiliation:
Université de Lorraine, Institut Jean Lamour, Vandoeuvre-lès-Nancy, F-54500, France. CNRS, UMR 7198, Vandoeuvre-lès-Nancy, F-54500, France.
Nandakumar Kalarikkal
Affiliation:
International and Interuniversity Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala- 686560, India. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, Kerala 686560, India.
Sabu Thomas
Affiliation:
International and Interuniversity Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala- 686560, India. School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala-686560, India.
*
*E-mail: [email protected]
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Abstract

We herein report the synthesis of highly-fluorescent CdSe/ZnS core-shell quantum dots (QDs) nanophosphors via a simple, non-phosphine and one pot synthetic method in the absence of an inert atmosphere. The as-prepared nanocrystallites were characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-vis) and photoluminescence spectroscopy, transmission electron microscopy (TEM) and high resolution TEM (HRTEM). The obtained CdSe/ZnS QDs were of high quality with sharp absorption peaks, bright luminescence, narrow emission width and high PL quantum yield (up to 74 %) without any size sorting. The structural analysis showed that the as-synthesised QDs are small and spherical in shape with narrow size distributions while the presence of the lattice fringe in the HRTEM image confirmed the crystallinity of the material. The dispersion of the obtained core-shell QDs in PMMA matrix resulted in the fabrication of highly fluorescent PMMA- CdSe/ZnS core shell QDs polymer nanocomposite film.

Keywords

core/shelloptical propertiesnanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1748: Symposium II – Semiconductor Nanocrystals, Plasmonic Metal Nanoparticles, and Metal-Hybrid Structures , 2015 , mrsf14-1748-ii11-18
Copyright
Copyright © Materials Research Society 2015 

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References

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