Local analysis of Eu2+ emission in CaAlSiN3.
Sci Technol Adv Mater
; 14(6): 064201, 2013 Dec.
Article
em En
| MEDLINE
| ID: mdl-27877619
ABSTRACT
We have investigated the local luminescence properties of Eu-doped CaAlSiN3 by using low-energy electron beam (e-beam) techniques. The particles yield broad emission centered at 655 nm with a shoulder at higher wavelength under light excitation, and a broad band around 643 nm with a tail at 540 nm under e-beam excitation. Using cathodoluminescence (CL) in a scanning electron microscope (SEM), we have observed small and large particles, which, although with different compositions, exhibit Eu2+-related emissions at 645 and 635 nm, respectively. Local CL measurements reveal that the Eu2+ emission may actually consist of several bands. In addition to the red broad band, regularly spaced sharp peaks have been occasionally observed. These luminescence variations may originate from a variation in the composition inside CaAlSiN3.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article