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Synthesis and Characterization of Small Dimensional Structures of Er-Doped SnO2 and Erbium−Tin−Oxide

A vapor-solid thermal method, avoiding the presence of catalyst or external substrate, has been employed to grow the Er-doped SnO2 elongated structures, different from the most commonly used sol–gel synthesis method.
D. Maestre et al., Phys. Chem. Chem. Phys., 2012, 14, 751–758.

Microtubes of Er-doped SnO2, as well as nanorods and nanoparticles, have been fabricated by a thermal evaporation−deposition method at temperatures between 1400 and 1500 °C. Er2Sn2O7has been also detected by X-ray diffraction spectroscopy. EDS and XPS measurements demonstrate that the microtubes contain a small amount of Er, below 0.5 at. %, different from regions from the surface of the pellets where the tubes grow, which shows a variable Er concentration up to 25 at. %. Cathodoluminescence spectra at the microtubes confirmed the presence of Er ions into SnO2 host, due to the observation of emissions in the visible and the infrared range at 1.87, 2.23, and 0.81 eV.

These emissions can be tuned as a function of the thermal treatment, which induce competitive processes between radiative transitions related to Er3+ions.

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Synthesis and Characterization of Small Dimensional Structures of Er-Doped SnO2and Erbium−Tin−Oxide D. Maestre, E. Hernández, A. Cremades, M. Amati,J. Piqueras Phys. Chem. Chem. Phys., 2012, 14, 751–758.
Last Updated on Monday, 26 October 2015 11:57