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Issue 92, 2016, Issue in Progress
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Synthesis, structure, EPR studies and up-conversion luminescence of ZnO:Er3+–Yb3+@Gd2O3 nanostructures

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Abstract

ZnO:Er3+–Yb3+@Gd2O3 nanostructures were obtained by “wet” chemistry methods – the sol–gel technique for the preparation of ZnO and ZnO:Er3+–Yb3+ nanoparticles (NPs), and the seed deposition method for obtaining Gd2O3. The crystal structure, morphology, phase and elemental composition, resonant microwave absorption of rare earth ions, point defects in the ZnO:Er3+–Yb3+@Gd2O3 crystal structure and up-conversion luminescence were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR) spectroscopy, and optical spectroscopy. The crystallization temperature (600 °C) of the Gd2O3 phase on the ZnO surface was found. As-obtained ZnO:Er3+–Yb3+ NPs (with size ∼7 nm) are highly crystalline and monodispersed. ZnO:Er3+–Yb3+ NPs annealing at 900 °C leads to the formation of highly polydispersed ZnO:Er3+–Yb3+ NPs, covered by a Gd2O3 shell. The process of the incorporation of the rare earth ions into the ZnO structure, as well as the effect of Gd2O3 content on the morphology and visible up-conversion (UC) luminescence in ZnO:Er3+–Yb3+ matrices were studied.

Graphical abstract: Synthesis, structure, EPR studies and up-conversion luminescence of ZnO:Er3+–Yb3+@Gd2O3 nanostructures

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Supplementary files

Article information


Submitted
19 Jul 2016
Accepted
08 Sep 2016
First published
13 Sep 2016

RSC Adv., 2016,6, 89305-89312
Article type
Paper

Synthesis, structure, EPR studies and up-conversion luminescence of ZnO:Er3+–Yb3+@Gd2O3 nanostructures

N. Babayevska, B. Peplińska, M. Jarek, L. Yate, K. Tadyszak, J. Gapiński, I. Iatsunskyi and S. Jurga, RSC Adv., 2016, 6, 89305
DOI: 10.1039/C6RA18393J

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