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Title: Transparent oxyfluoride glass ceramics co-doped with Er{sup 3+} and Yb{sup 3+} - Crystallization and upconversion spectroscopy

Abstract

Transparent glass ceramics in the system SiO{sub 2}-B{sub 2}O{sub 3}-PbO-CdO-PbF{sub 2}-CdF{sub 2}-YbF{sub 3}-ErF{sub 3} showing infrared to visible anti-Stokes (upconversion) luminescence are studied in the present work. The glass compositions have been optimized in order to reduce the melting temperature and, hence, to obtain laboratory scale samples with good optical quality. Erbium-doped nanoscale Pb{sub 4}Yb{sub 3}F{sub 17} crystals are precipitated in the precursor glasses during annealing at temperatures 30-40 K above T{sub g}. A kinetically self-constrained growth explains the nano sizes of the crystals. Both the Stokes and anti-Stokes luminescence spectra of glasses could be explained with clustering of the Yb{sup 3+} and Er{sup 3+} ions in fluorine-rich regions. At the annealing temperature these regions act as nucleation precursors. The crystal growth further enhances the local concentration of these ions. Consequently, a series of energy transfer and energy cross relaxation processes occurs between adjacent rare earth ions leading to the observed luminescence spectra of the glass ceramics studied. -- Graphical abstract: A highly viscous shell (shown in the picture in dark blue) is build around the growing crystal (white circles). When the shell's T{sub g} approaches the annealing temperature, the crystal growth is fully suppressed for kinetic reasons. The upconversionmore » luminescence, resulting from the simultaneous absorption of two and even three infrared photons, is depicted schematically in the right part of the figure. Display Omitted Highlights: {yields} New oxyfluoride glass compositions with reduced melting temperature are formulated. {yields} The phase Pb{sub 4}Yb{sub 3}F{sub 17} doped with Er{sup 3+} ions crystallizes in these glasses. {yields} A kinetically self-constrained growth explains the nano sizes of the crystals. {yields} Clustering of Yb{sup 3+}, Er{sup 3+} and Pb{sup 2+} ions into fluorine-rich glass regions is observed. {yields} The luminescence of glass-ceramics is consistent with its structure.« less

Authors:
 [1]; ;  [2]
  1. Department of Physics, University of Chemical Technology and Metallurgy, Sofia 1756 (Bulgaria)
  2. Otto-Schott-Institut, Jena, University (Germany)
Publication Date:
OSTI Identifier:
21494269
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 184; Journal Issue: 5; Other Information: DOI: 10.1016/j.jssc.2011.03.017; PII: S0022-4596(11)00114-9; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANNEALING; BORON OXIDES; CADMIUM FLUORIDES; CADMIUM OXIDES; CERAMICS; CRYSTALLIZATION; DOPED MATERIALS; ERBIUM FLUORIDES; ERBIUM IONS; FLUORINE; GLASS; LEAD FLUORIDES; LEAD IONS; LEAD OXIDES; LUMINESCENCE; MELTING POINTS; NANOSTRUCTURES; OXYFLUORIDES; SILICON OXIDES; YTTERBIUM FLUORIDES; YTTERBIUM IONS; BORON COMPOUNDS; CADMIUM COMPOUNDS; CADMIUM HALIDES; CHALCOGENIDES; CHARGED PARTICLES; ELEMENTS; EMISSION; ERBIUM COMPOUNDS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HALOGENS; HEAT TREATMENTS; IONS; LEAD COMPOUNDS; LEAD HALIDES; MATERIALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; OXYHALIDES; PHASE TRANSFORMATIONS; PHOTON EMISSION; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SILICON COMPOUNDS; THERMODYNAMIC PROPERTIES; TRANSITION TEMPERATURE; YTTERBIUM COMPOUNDS

Citation Formats

Gugov, I., E-mail: i.gugov@uctm.ed, Mueller, M., and Ruessel, C. Transparent oxyfluoride glass ceramics co-doped with Er{sup 3+} and Yb{sup 3+} - Crystallization and upconversion spectroscopy. United States: N. p., 2011. Web. doi:10.1016/j.jssc.2011.03.017.
Gugov, I., E-mail: i.gugov@uctm.ed, Mueller, M., & Ruessel, C. Transparent oxyfluoride glass ceramics co-doped with Er{sup 3+} and Yb{sup 3+} - Crystallization and upconversion spectroscopy. United States. doi:10.1016/j.jssc.2011.03.017.
Gugov, I., E-mail: i.gugov@uctm.ed, Mueller, M., and Ruessel, C. Sun . "Transparent oxyfluoride glass ceramics co-doped with Er{sup 3+} and Yb{sup 3+} - Crystallization and upconversion spectroscopy". United States. doi:10.1016/j.jssc.2011.03.017.
@article{osti_21494269,
title = {Transparent oxyfluoride glass ceramics co-doped with Er{sup 3+} and Yb{sup 3+} - Crystallization and upconversion spectroscopy},
author = {Gugov, I., E-mail: i.gugov@uctm.ed and Mueller, M. and Ruessel, C.},
abstractNote = {Transparent glass ceramics in the system SiO{sub 2}-B{sub 2}O{sub 3}-PbO-CdO-PbF{sub 2}-CdF{sub 2}-YbF{sub 3}-ErF{sub 3} showing infrared to visible anti-Stokes (upconversion) luminescence are studied in the present work. The glass compositions have been optimized in order to reduce the melting temperature and, hence, to obtain laboratory scale samples with good optical quality. Erbium-doped nanoscale Pb{sub 4}Yb{sub 3}F{sub 17} crystals are precipitated in the precursor glasses during annealing at temperatures 30-40 K above T{sub g}. A kinetically self-constrained growth explains the nano sizes of the crystals. Both the Stokes and anti-Stokes luminescence spectra of glasses could be explained with clustering of the Yb{sup 3+} and Er{sup 3+} ions in fluorine-rich regions. At the annealing temperature these regions act as nucleation precursors. The crystal growth further enhances the local concentration of these ions. Consequently, a series of energy transfer and energy cross relaxation processes occurs between adjacent rare earth ions leading to the observed luminescence spectra of the glass ceramics studied. -- Graphical abstract: A highly viscous shell (shown in the picture in dark blue) is build around the growing crystal (white circles). When the shell's T{sub g} approaches the annealing temperature, the crystal growth is fully suppressed for kinetic reasons. The upconversion luminescence, resulting from the simultaneous absorption of two and even three infrared photons, is depicted schematically in the right part of the figure. Display Omitted Highlights: {yields} New oxyfluoride glass compositions with reduced melting temperature are formulated. {yields} The phase Pb{sub 4}Yb{sub 3}F{sub 17} doped with Er{sup 3+} ions crystallizes in these glasses. {yields} A kinetically self-constrained growth explains the nano sizes of the crystals. {yields} Clustering of Yb{sup 3+}, Er{sup 3+} and Pb{sup 2+} ions into fluorine-rich glass regions is observed. {yields} The luminescence of glass-ceramics is consistent with its structure.},
doi = {10.1016/j.jssc.2011.03.017},
journal = {Journal of Solid State Chemistry},
number = 5,
volume = 184,
place = {United States},
year = {Sun May 15 00:00:00 EDT 2011},
month = {Sun May 15 00:00:00 EDT 2011}
}