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CsEuBr3: Crystal structure and its role in the photostimulation of CsBr:Eu2+

Hesse, S. and Zimmermann, J. and von Seggern, H. and Ehrenberg, H. and Fuess, H. and Fasel, C. and Riedel, R. (2006):
CsEuBr3: Crystal structure and its role in the photostimulation of CsBr:Eu2+.
100, In: Journal of Applied Physics, (8), AIP Publishing, pp. 083506, ISSN 0021-8979, DOI: 10.1063/1.2358328,
[Online-Edition: https://doi.org/10.1063/1.2358328],
[Article]

Abstract

CsBr:Eu2+ has recently been investigated as a photostimulable x-ray storage phosphor with great potential for application in high-resolution image plates. In a recent paper Hackenschmied et al. [J. Appl. Phys. 93, 5109 (2003)] suggested that segregations of CsEuBr3 or Cs4EuBr6 formed within CsBr:Eu2+ during annealing are responsible for an increase in the photostimulated luminescence (PSL) yield. In this work single crystals of CsEuBr3 were prepared by a one step synthesis and identified by x-ray diffraction (XRD) analysis as single phase perovskites. It was concluded that, after preparation, CsEuBr3 degrades in normal atmosphere into at least two phases, one of which is the orthorhombic structure of Cs2EuBr5∙10H2O. The XRD powder diffraction pattern of this compound is very similar to that of the segregations observed within CsBr:Eu2+ and reported by Hackenschmied et al. However, the increased PSL yield in CsBr:Eu2+ after annealing cannot be due to the segregations, because the trivalent nature of the europium in the segregations renders them PSL inactive.

Item Type: Article
Erschienen: 2006
Creators: Hesse, S. and Zimmermann, J. and von Seggern, H. and Ehrenberg, H. and Fuess, H. and Fasel, C. and Riedel, R.
Title: CsEuBr3: Crystal structure and its role in the photostimulation of CsBr:Eu2+
Language: English
Abstract:

CsBr:Eu2+ has recently been investigated as a photostimulable x-ray storage phosphor with great potential for application in high-resolution image plates. In a recent paper Hackenschmied et al. [J. Appl. Phys. 93, 5109 (2003)] suggested that segregations of CsEuBr3 or Cs4EuBr6 formed within CsBr:Eu2+ during annealing are responsible for an increase in the photostimulated luminescence (PSL) yield. In this work single crystals of CsEuBr3 were prepared by a one step synthesis and identified by x-ray diffraction (XRD) analysis as single phase perovskites. It was concluded that, after preparation, CsEuBr3 degrades in normal atmosphere into at least two phases, one of which is the orthorhombic structure of Cs2EuBr5∙10H2O. The XRD powder diffraction pattern of this compound is very similar to that of the segregations observed within CsBr:Eu2+ and reported by Hackenschmied et al. However, the increased PSL yield in CsBr:Eu2+ after annealing cannot be due to the segregations, because the trivalent nature of the europium in the segregations renders them PSL inactive.

Journal or Publication Title: Journal of Applied Physics
Volume: 100
Number: 8
Publisher: AIP Publishing
Uncontrolled Keywords: Crystallography, Phosphorescence, Sintering, X-ray diffraction, Chemical compounds and components, Powder diffraction, Chemical elements, Optical materials, Photostimulation, Perovskites
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science > Electronic Materials
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science > Structure Research
Date Deposited: 17 Dec 2018 12:41
DOI: 10.1063/1.2358328
Official URL: https://doi.org/10.1063/1.2358328
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