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6CCVD Research

Cathodoluminescence of N-doped SnO<sub>2</sub> nanowires and microcrystals

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2016-01-01
JournalAIMS Materials Science
AuthorsDavid Montalvo, Manuel Herrera
InstitutionsUniversidad AutĂłnoma de Baja California, Universidad Nacional AutĂłnoma de MĂ©xico
Citations2

Abstract

Section titled “Abstract”

We present a cathodoluminescence (CL) study of the point defects in N-doped SnO<sub>2</sub> nanowires and microcrystals synthesized by thermal evaporation at different growth temperatures and N concentrations. SnO<sub>2</sub>:N nanowires were grown at temperatures higher than 1150 °C with N concentrations below of about 3 at.%, while irregular microcrystals were obtained at lower temperatures increasing their N concentration gradually with the growth temperature. EELS and XPS measurements confirmed that N atoms were incorporated into the SnO<sub>2</sub> lattice as substitutional impurities (N<sub>O</sub>). TEM and EDS measurements revealed that the nanowires grew along the [001] direction by a self-catalyzed growth mechanism. CL measurements showed that the nanowires and microcrystals generated a broad emission composed by three components centered at about 2.05, 2.47 and 2.75 eV. CL spectra obtained at 300 and 100 K showed that the component of 2.05 eV decreased in intensity proportionally to the nitrogen content of samples. We attribute this effect to a decrease of oxygen vacancies in the SnO<sub>2</sub> nanowires and microcrystals, generated by the incorporation of nitrogen in their lattice.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
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  4. 2006 - Ab-initio calculations of the electronic structure and spectroscopic properties of spinel Îł-Sn<sub>3</sub>N<sub>4</sub> [Crossref]
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