A white phosphor based on oxyfluoride nano-glass-ceramics co-doped with Eu3+ and Tb3+: Energy transfer study - Publikacja - MOST Wiedzy

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A white phosphor based on oxyfluoride nano-glass-ceramics co-doped with Eu3+ and Tb3+: Energy transfer study

Abstrakt

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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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
JOURNAL OF ALLOYS AND COMPOUNDS nr 724, strony 649 - 658,
ISSN: 0925-8388
Język:
angielski
Rok wydania:
2017
Opis bibliograficzny:
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:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.jallcom.2017.07.055
Weryfikacja:
Politechnika Gdańska

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