Synthesis of Eu-doped SrAl2O4 nanophosphors by CO2 laser vaporization

Journal article
(Original article)


Publication Details

Author(s): Zollfrank C, Gruber S, Batentschuk M, Osvet A, Götz-Neunhoeffer F, Dittrich S, Grabow J, Kurland HD, Müller FA
Journal: Acta Materialia
Publisher: Elsevier
Publication year: 2013
Volume: 61
Journal issue: 19
Pages range: 7133-7141
ISSN: 1359-6454
Language: English


Abstract


A new method of synthesizing spherical nanoparticles with photoluminescent spinel structures using a CO2 laser co-vaporization technique (CoLAVA) is presented. The method applies homogeneous mixtures of oxidic precursors such as Al2O3, SrO and Eu2O 3 and allows the fabrication of quantities exceeding 10 g h -1. During the CoLAVA process, the educt oxides are reacted by a gas phase condensation yielding amorphous spherical particles with diameters ranging from 10 to 100 nm. The as-prepared materials exhibit red emission at 625 nm (1.98 eV) due to the incorporated Eu3+. Temperature treatment up to 1200 C under a reducing atmosphere yielded crystalline particles of the same size, which were slightly sintered. These particles consisted of >90 wt.% SrAl2O4 with minor fractions of Sr3Al 2O6 and SrCO3. The amount of the SrAl 2O4 spinel increased with increasing temperature, whereas the accompanying phases were decreased. A strong green emission centered at 525 nm (2.36 eV) detected at RT was observed at an onset temperature of 900 C, which is due to the presence of Eu2+ in the crystal lattice of SrAl 2O4. The red emission was not observed at higher annealing temperatures. The CoLAVA method represents a fast and facile route for the fabrication of nano- to microstructured phosphor materials for a variety of engineering applications. © 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.



FAU Authors / FAU Editors

Batentschuk, Miroslaw PD Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Dittrich, Sebastian
Lehrstuhl für Mineralogie
Götz-Neunhoeffer, Friedlinde Prof. Dr.
Lehrstuhl für Mineralogie
Gruber, Sabine
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Osvet, Andres Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Zollfrank, Cordt PD Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)


External institutions
Friedrich-Schiller-Universität Jena
Universität des Saarlandes


How to cite

APA:
Zollfrank, C., Gruber, S., Batentschuk, M., Osvet, A., Götz-Neunhoeffer, F., Dittrich, S.,... Müller, F.A. (2013). Synthesis of Eu-doped SrAl2O4 nanophosphors by CO2 laser vaporization. Acta Materialia, 61(19), 7133-7141. https://dx.doi.org/10.1016/j.actamat.2013.08.010

MLA:
Zollfrank, Cordt, et al. "Synthesis of Eu-doped SrAl2O4 nanophosphors by CO2 laser vaporization." Acta Materialia 61.19 (2013): 7133-7141.

BibTeX: 

Last updated on 2018-09-12 at 13:50