Synthesis of Eu-doped SrAl2O4 nanophosphors by CO2 laser vaporization

Zollfrank C, Gruber S, Batentschuk M, Osvet A, Götz-Neunhoeffer F, Dittrich S, Grabow J, Kurland HD, Müller FA (2013)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2013

Journal

Acta Materialia Elsevier

Publisher: Elsevier

Book Volume: 61

Pages Range: 7133-7141

Journal Issue: 19

DOI: 10.1016/j.actamat.2013.08.010

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.

Authors with CRIS profile

Cordt Zollfrank Lehrstuhl für Glas und Keramik (WW3) Sabine Gruber Lehrstuhl für Glas und Keramik (WW3) Miroslaw Batentschuk Institute Materials for Electronics and Energy Technology (i-MEET) Andres Osvet Institute Materials for Electronics and Energy Technology (i-MEET) Friedlinde Götz-Neunhoeffer Lehrstuhl für Mineralogie Sebastian Dittrich Lehrstuhl für Mineralogie

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Universität des Saarlandes (UdS) DE Germany (DE)

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://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.

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