Cathodoluminescence of defects in sintered tin oxide



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Maestre Varea, David and Cremades Rodríguez, Ana Isabel and Piqueras de Noriega, Javier (2004) Cathodoluminescence of defects in sintered tin oxide. Journal of Applied Physics , 95 (6). pp. 3027-3030. ISSN 0021-8979

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Cathodoluminescence (CL) in the scanning electron microscope (SEM) has been used to investigate the luminescence mechanisms in tin oxide. Sintered material prepared from high purity powder has been found to show a strong dependence of the CL emission on the thermal treatments applied during sample preparation. SEM images show the presence of nano and microcrystalline grains. The correlation of the grain size and morphology with the optical emission is analyzed by CL microscopy and spectroscopy. The main emission bands appear centered at about 2.58, 2.25, and 1.94 eV depending on the sintering treatment. CL images reveal that the 2.25 and the 2.58 eV bands are associated at specific crystal faces. The evolution of the luminescence bands with mechanical milling shows a complex evolution of the 1.94 and 2.58 eV emissions which is explained by formation and recovery of defects during milling.

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© 2004 American Institute of Physics.
This work has been supported by MCYT (Project No. MAT 2000-2119). D. M. acknowledges a grant from MCYT

Uncontrolled Keywords:Luminescence Properties, Single-Crystals, Sno_2, Surface, States, Oxygen, Zno
Subjects:Sciences > Physics > Materials
ID Code:23292
Deposited On:23 Oct 2013 16:25
Last Modified:13 Feb 2018 14:47

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