Szczegóły publikacji
Opis bibliograficzny
Broadened NIR emission and energy transfers in $SiO_{2}-LaF_{3}: Nd^{3+}, Pr^{3+}$ sol-gel nano-glass-ceramics / Joanna Śmiarowska, Natalia Żak, Bartosz HANDKE, Maciej SITARZ, Wojciech A. Pisarski // Journal of Alloys and Compounds ; ISSN 0925-8388 . — 2025 — vol. 1048 art. no. 185239, s. 1-16. — Bibliogr. s. 15-16, Abstr. — Publikacja dostępna online od: 2025-11-24
Autorzy (5)
- Śmiarowska Joanna
- Żak Natalia
- AGHHandke Bartosz
- AGHSitarz Maciej
- Pisarski Wojciech A.
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 166634 |
|---|---|
| Data dodania do BaDAP | 2026-03-25 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.jallcom.2025.185239 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Alloys and Compounds |
Abstract
In this work, the series of xerogels co-doped with Nd3+ and Pr3+ ions were synthesized using low-temperature sol-gel method and further transformed into glass-ceramic materials via controlled heat treatment at 700⁰C. The LaF3 phase crystallization was confirmed using X-ray diffraction analysis (XRD). The luminescent characterization of the obtained materials was performed based on the recorded excitation (Nd3+: 1063 nm, Pr3+: 636 nm) and emission spectra (Nd3+: 579 nm, 793 nm, Pr3+: 444 nm), along with decay curves for the appropriate excited states of the lanthanide ions (Nd3+:4F3/2; Pr3+:1D2). The obtained materials exhibited broadened emission in NIR spectral range upon excitation at λexc = 444 nm wavelength; the largest FWHM in 1250–1650 nm region was found to be 167 nm. However, using the excitation wavelength characteristic for Nd3+ ions (λexc = 579 nm, 793 nm), no visible changes in luminescence profile were observed. Based on decay analysis, Nd3+ → Pr3+ energy transfer was evidenced, and the backward energy transfer, Pr3+ → Nd3+, was also proven. In general, the increasing concentration of acceptor in the subsequent samples led to an increase of the energy transfer efficiency (ηPr→Nd from 39 % to 82 %; ηNd→Pr from 23 % to 85 %). There was also observed efficient luminescence quenching due to cross-relaxation processes for both optically active dopants. The results indicate that the fabricated sol-gel materials exhibit broadband NIR emission within the II biological window as well as the E-, O-, and S-bands of the fifth telecommunication window.
