Effects of Cu^sup 2+^ ion incorporation into ZnTe nanocrystals dispersed within a glass matrix

This paper reports on the optical, morphological, structural and magnetic properties of Zn1-xCuxTe nanocrystals, doped with Cu (x varying from 0.000 to 0.100) and grown by thermal annealing at 500 °C in a P2O5–ZnO–Al2O3–BaO–PbO glass system that had been synthesized by fusion. At higher levels of Cu...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-06, Vol.749, p.681
Main Authors: Silva, Alessandra S, Pelegrini, Fernando, Figueiredo, Leandro C, de Souza, Paulo EN, Morais, Paulo C, Dantas, Noelio O
Format: Article
Language:English
Subjects:
Aluminum oxide
Barium oxides
Copper
Dispersion
Electron paramagnetic resonance
Glass
Image transmission
Magnetic properties
Magnetism
Nanocrystals
Optical properties
Phosphorus pentoxide
Semiconductors
Transmission electron microscopy
Zinc oxide
Zinc telluride
Zinc tellurides
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Summary:This paper reports on the optical, morphological, structural and magnetic properties of Zn1-xCuxTe nanocrystals, doped with Cu (x varying from 0.000 to 0.100) and grown by thermal annealing at 500 °C in a P2O5–ZnO–Al2O3–BaO–PbO glass system that had been synthesized by fusion. At higher levels of Cu-doping, optical absorption (OA) showed that Cu2+ ions were incorporated within and dispersed throughout the lattice of the ZnTe semiconductor. The OA spectra also showed that the growth kinetics of these NCs were influenced by the Cu2+ magnetic ions. Transmission electron microscopy (TEM) images revealed that the lattice parameter of the nanocrystals was not affected by the incorporation of Cu2+ ions. Finally, electron paramagnetic resonance (EPR) spectra of the Cu2+ ions showed asymmetrical hyperfine lines as well as proved a substitutive incorporation of Cu2+ in ZnTe NCs.
ISSN:0925-8388
1873-4669