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Title: Luminescence of Tb-doped Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2} oxide upon UV and VUV synchrotron radiation excitation

Abstract

Powders of calcium yttrium silicate, Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2}, containing 0.1-3% Tb{sup 3+} were prepared using a sol-gel method and characterized with XRD, IR, UV-vis and UV-VUV spectroscopies at room temperature and 10 K. Structural analysis revealed pure monoclinic phase of Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2} after heat-treatment at 1000 deg. C. Infrared spectroscopy showed that between 800 and 900 deg. C a short-range structural organization of the components proceeded, yet without crystallization. A strong emission of Tb{sup 3+} had been observed both in the green part of the spectrum due to the {sup 5}D{sub 4}{yields}{sup 7}F{sub J} transitions and in the blue-violet region owing to the {sup 5}D{sub 3}{yields}{sup 7}F{sub J} radiative relaxation. The color of the light could be tuned from yellowish-green to bluish-white both by means of the dopant content and the temperature of synthesis. Efficient luminescence of Tb{sup 3+}-doped Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2} phosphors could also be obtained upon stimulation with vacuum ultraviolet synchrotron radiation demonstrating that an energy transfer from the host to the Tb{sup 3+} ions takes place. - Graphical abstract: Luminescence of Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2}:Tb covers the whole visible region of electromagnetic spectrum and themore » relative intensity of the blue part against the green one depends on the activator content and technological parameters of preparation. Highlights: > VUV-UV-vis luminescence of Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2}:Tb at RT and 10 K was analyzed. > Tb{sup 3+} ion can be excited directly or through the host lattice. > Specific structure of the host allowed to get intense {sup 5}D{sub 3}{yields}{sup 7}F{sub J} luminescence. > At 10 K an exciton is formed and radiatively relaxes with the use of a defect.« less

Authors:
 [1];  [1]
  1. Faculty of Chemistry, University of Wroclaw, 14. F. Joliot-Curie Street, 50-383 Wroclaw (Poland)
Publication Date:
OSTI Identifier:
21580146
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 184; Journal Issue: 7; Other Information: DOI: 10.1016/j.jssc.2011.05.014; PII: S0022-4596(11)00263-5; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION SPECTROSCOPY; AFTER-HEAT; CALCIUM; CRYSTALLIZATION; DOPED MATERIALS; ENERGY TRANSFER; EXCITATION; FAR ULTRAVIOLET RADIATION; INFRARED SPECTRA; LUMINESCENCE; MONOCLINIC LATTICES; OXIDES; RELAXATION; SOL-GEL PROCESS; STIMULATION; SYNCHROTRON RADIATION; SYNTHESIS; TERBIUM IONS; X-RAY DIFFRACTION; YTTRIUM SILICATES; ALKALINE EARTH METALS; BREMSSTRAHLUNG; CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; ELECTROMAGNETIC RADIATION; ELEMENTS; EMISSION; ENERGY-LEVEL TRANSITIONS; IONS; MATERIALS; METALS; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHOTON EMISSION; RADIATIONS; SCATTERING; SILICATES; SILICON COMPOUNDS; SPECTRA; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS; ULTRAVIOLET RADIATION; YTTRIUM COMPOUNDS

Citation Formats

Dobrowolska, Anna, and Zych, Eugeniusz, E-mail: zych@wchuwr.pl. Luminescence of Tb-doped Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2} oxide upon UV and VUV synchrotron radiation excitation. United States: N. p., 2011. Web. doi:10.1016/j.jssc.2011.05.014.
Dobrowolska, Anna, & Zych, Eugeniusz, E-mail: zych@wchuwr.pl. Luminescence of Tb-doped Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2} oxide upon UV and VUV synchrotron radiation excitation. United States. doi:10.1016/j.jssc.2011.05.014.
Dobrowolska, Anna, and Zych, Eugeniusz, E-mail: zych@wchuwr.pl. Fri . "Luminescence of Tb-doped Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2} oxide upon UV and VUV synchrotron radiation excitation". United States. doi:10.1016/j.jssc.2011.05.014.
@article{osti_21580146,
title = {Luminescence of Tb-doped Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2} oxide upon UV and VUV synchrotron radiation excitation},
author = {Dobrowolska, Anna and Zych, Eugeniusz, E-mail: zych@wchuwr.pl},
abstractNote = {Powders of calcium yttrium silicate, Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2}, containing 0.1-3% Tb{sup 3+} were prepared using a sol-gel method and characterized with XRD, IR, UV-vis and UV-VUV spectroscopies at room temperature and 10 K. Structural analysis revealed pure monoclinic phase of Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2} after heat-treatment at 1000 deg. C. Infrared spectroscopy showed that between 800 and 900 deg. C a short-range structural organization of the components proceeded, yet without crystallization. A strong emission of Tb{sup 3+} had been observed both in the green part of the spectrum due to the {sup 5}D{sub 4}{yields}{sup 7}F{sub J} transitions and in the blue-violet region owing to the {sup 5}D{sub 3}{yields}{sup 7}F{sub J} radiative relaxation. The color of the light could be tuned from yellowish-green to bluish-white both by means of the dopant content and the temperature of synthesis. Efficient luminescence of Tb{sup 3+}-doped Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2} phosphors could also be obtained upon stimulation with vacuum ultraviolet synchrotron radiation demonstrating that an energy transfer from the host to the Tb{sup 3+} ions takes place. - Graphical abstract: Luminescence of Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2}:Tb covers the whole visible region of electromagnetic spectrum and the relative intensity of the blue part against the green one depends on the activator content and technological parameters of preparation. Highlights: > VUV-UV-vis luminescence of Ca{sub 3}Y{sub 2}(Si{sub 3}O{sub 9}){sub 2}:Tb at RT and 10 K was analyzed. > Tb{sup 3+} ion can be excited directly or through the host lattice. > Specific structure of the host allowed to get intense {sup 5}D{sub 3}{yields}{sup 7}F{sub J} luminescence. > At 10 K an exciton is formed and radiatively relaxes with the use of a defect.},
doi = {10.1016/j.jssc.2011.05.014},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 7,
volume = 184,
place = {United States},
year = {2011},
month = {7}
}