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A white phosphor based on oxyfluoride nano-glass-ceramics co-doped with Eu3+ and Tb3+: Energy transfer study
Abstract
Strontium fluoride nanocrystals doped separately with Ln3+ = Eu3+ or Tb3+ ions (95SrF2·5LnF2), as well as co-doped with both the ions (95SrF2·Eu4Tb) were synthesized for comparison. Then, glass-ceramics consisting of the mono-doped or di-doped SrF2 nanocrystals incorporated into amorphous silica (90SiO2·9.5SrF2·0.5Ln or 90SiO2·9.5SrF2·0.1EuF3·0.4Tb) were prepared by sol-gel procedure. The studied materials were characterized by XRD, while the glass-ceramics additionally by SEM and BSE (backscattered electrons) techniques. Luminescence emission and excitation spectra of the doubly doped materials exhibited presence of such effects as simultaneous independent excitation and energy transfer Tb3+ → Eu3+ as well as cross-relaxation in the materials with Tb3+ dopant. Tb3+ lifetime in 90SiO2·9.5SrF2·0.5EuF3·0.4TbF3 was distinctly reduced compared to 90SiO2·9.5SrF2·0.5TbF3 probably by the Tb3+ → Eu3+ energy transfer. Owing to blue emission of SiO2, green light emitted by Tb3+ and red one by Eu3+ the 90SiO2·9.5SrF2·0.5EuF3·0.4TbF3 nano-glass-ceramics can play a white phosphor role.
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Authors (5)
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Dorota Wileńska mgr
- Uniwersytet Gdański Wydział Chemii
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
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JOURNAL OF ALLOYS AND COMPOUNDS
no. 724,
pages 649 - 658,
ISSN: 0925-8388 - Language:
- English
- Publication year:
- 2017
- Bibliographic description:
- Kłonkowski A., Wiczk W., Ryl J., Szczodrowski K., Wileńska, D.: A white phosphor based on oxyfluoride nano-glass-ceramics co-doped with Eu3+ and Tb3+: Energy transfer study// JOURNAL OF ALLOYS AND COMPOUNDS. -Vol. 724, (2017), s.649-658
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jallcom.2017.07.055
- Verified by:
- Gdańsk University of Technology
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