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

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.05.014· OSTI ID:21580146

Dobrowolska, Anna ^[1]; Zych, Eugeniusz ^[1]

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1. Faculty of Chemistry, University of Wroclaw, 14. F. Joliot-Curie Street, 50-383 Wroclaw (Poland)

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.

• OSTI ID: 21580146
• Journal Information: Journal of Solid State Chemistry, Vol. 184, 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.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

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