title: XANES studies on Eu-doped fluorozirconate based glass ceramics.
abstract: The influence of adding InF3as a reducing agent on the oxidation state of Eu in fluorochloro- (FCZ) and fluorobromozirconate (FBZ) glass ceramics was investigated using x-ray absorption near edge (XANES) and photoluminescence (PL) spectroscopy. For both materials, it was found that InF3decreases the Eu2+-to-Eu3+ratio significantly. PL spectroscopy proved that an annealing step leads to the formation of Eu-doped BaCl2and BaBr2nanocrystals in the FCZ and FBZ glasses, respectively. In the case of FCZ glass ceramics the hexagonal phase of BaCl2could be detected in indium-free and InF3-doped ceramics, but only for InF3containing FCZ glass ceramics a phase transition of the nanoparticles from hexagonal to orthorhombic structure is observed. For the FBZ glass ceramics, the hexagonal phase of BaBr2can be formed with and without indium doping, but only in the indium-free case a phase transition to orthorhombic BaBr2could be found.
authors.affiliation: Fraunhofer Center for Silicon Photovoltaics, Walter-Hülse-Str. 1, 06120 Halle (Saale), Germany ; Centre for Innovation Competence SiLi-nano®, Martin Luther University of Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Str. 3, 06120 Halle (Saale), Germany.
authors.forename: Bastian
authors.initials: B
authors.lastname: Henke
authors.affiliation: Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany.
authors.forename: Patrick
authors.initials: P
authors.lastname: Keil
authors.affiliation: Centre for Innovation Competence SiLi-nano®, Martin Luther University of Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Str. 3, 06120 Halle (Saale), Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Paßlick
authors.affiliation: Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany.
authors.forename: Dirk
authors.initials: D
authors.lastname: Vogel
authors.affiliation: Department of Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Rohwerder
authors.affiliation: Department of Physics, University of Paderborn, Warburger Str. 100, 33100 Paderborn, Germany.
authors.forename: Marie-Christin
authors.initials: MC
authors.lastname: Wiegand
authors.affiliation: Department of Materials Science and Engineering, University of Tennessee Space Institute, Tullahoma, TN 37388, USA.
authors.forename: Jacqueline A
authors.initials: JA
authors.lastname: Johnson
authors.affiliation: Fraunhofer Center for Silicon Photovoltaics, Walter-Hülse-Str. 1, 06120 Halle (Saale), Germany ; Centre for Innovation Competence SiLi-nano®, Martin Luther University of Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Str. 3, 06120 Halle (Saale), Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Schweizer
references.citation: J Appl Phys. 2009 Dec 1;106(11):113501
references.pmid: 20057931