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From structure to luminescence investigation of oxyfluoride transparent glasses and glass-ceramics doped with Eu3+/Dy3+ ions
Abstract
Glasses and glass-ceramics with nominal composition 73 TeO2– 4BaO– 3Bi2O3–18SrF2-2RE2O3 (where RE = Eu, Dy) have been synthesized by conventional melt-quenching technique and subsequent heat treatment at 370 °C for 24 h in air atmosphere. Various Eu3+ to Dy3+ molar ratio have been applied to investigate luminescence properties in both glass and glass-ceramic matrices. Especially, white light emission through simultaneous excitation of Eu3+ and Dy3+ has been studied in detail. Influence of crystalline SrF2 phase on luminescence kinetics has been determined by luminescence decay time measurements. Presence of crystalline SrF2 phase has been confirmed by X-ray diffraction technique XRD and transmission electron microscopy TEM. X-ray photoelectron spectroscopy XPS and Fourier-transform infrared spectroscopy FTIR have been applied to get further insight into structural properties of glass and glass-ceramic materials. Color tunable white light emission has been obtained using UV excitation. Influence of the SrF2 crystallization on luminescence properties of prepared materials have been described in detail. Moreover, luminescence properties and especially emission color dependence on the Eu3+ to Dy3+ molar ratio have been exhaustively studied. Color-tunable white light emission has been observed as a result of simultaneous radiative transition of both, Eu3+ and Dy3+ ions when applying UV excitation. Judd – Ofelt and other optical parameters have been calculated based on luminescence emission spectra. Achieved results confirm that tellurite glass-ceramics containing SrF2 nanocrystals are good hosts for RE3+ ions and they can be considered as new phosphors for white light emitting diodes WLEDs.
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Authors (8)
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Ana I. Becerro
- Instituto de Ciencia de Materiales de Sevilla (CSIC-US)
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Anna Synak
- Wydział Matematyki Fizyki i Informatyki Instytut Fizyki Eksperymentalnej
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
JOURNAL OF ALLOYS AND COMPOUNDS
no. 806,
pages 1410 - 1418,
ISSN: 0925-8388 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Walas M., Lisowska M., Lewandowski T., Becerro A., Łapiński M., Synak A., Sadowski W., Kościelska B.: From structure to luminescence investigation of oxyfluoride transparent glasses and glass-ceramics doped with Eu3+/Dy3+ ions// JOURNAL OF ALLOYS AND COMPOUNDS -Vol. 806, (2019), s.1410-1418
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jallcom.2019.07.017
- Verified by:
- Gdańsk University of Technology
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