http://hdl.handle.net/20.500.12128/22386
Tytuł: | Luminescence of SiO2-BaF2:Tb3+, Eu3+ nano-glass-ceramics made from sol-gel method at low temperature |
Autor: | Pawlik, Natalia Szpikowska-Sroka, Barbara Goryczka, Tomasz Pietrasik, Ewa Pisarski, Wojciech A. |
Słowa kluczowe: | BaF2 nanophase; oxyfluoride nano-glass-ceramics; Tb3+/Eu3+ energy transfer; sol–gel chemistry |
Data wydania: | 2022 |
Źródło: | "Nanomaterials" (2022), iss. 2, art. no. 259, s. 1-16 |
Abstrakt: | The synthesis and characterization of multicolor light-emitting nanomaterials based on rare earths (RE3+) are of great importance due to their possible use in optoelectronic devices, such as LEDs or displays. In the present work, oxyfluoride glass-ceramics containing BaF2 nanocrystals co-doped with Tb3+, Eu3+ ions were fabricated from amorphous xerogels at 350 C. The analysis of the thermal behavior of fabricated xerogels was performed using TG/DSC measurements (thermogravimetry (TG), differential scanning calorimetry (DSC)). The crystallization of BaF2 phase at the nanoscale was confirmed by X-ray diffraction (XRD) measurements and transmission electron microscopy (TEM), and the changes in silicate sol–gel host were determined by attenuated total reflectance infrared (ATR-IR) spectroscopy. The luminescent characterization of prepared sol–gel materials was carried out by excitation and emission spectra along with decay analysis from the 5D4 level of Tb3+. As a result, the visible light according to the electronic transitions of Tb3+ (5D4 ! 7FJ (J = 6–3)) and Eu3+ (5D0 ! 7FJ (J = 0–4)) was recorded. It was also observed that co-doping with Eu3+ caused the shortening in decay times of the 5D4 state from 1.11 ms to 0.88 ms (for xerogels) and from 6.56 ms to 4.06 ms (for glass-ceramics). Thus, based on lifetime values, the Tb3+/Eu3+ energy transfer (ET) efficiencies were estimated to be almost 21% for xerogels and 38% for nano-glass-ceramics. Therefore, such materials could be successfully predisposed for laser technologies, spectral converters, and three-dimensional displays. |
URI: | http://hdl.handle.net/20.500.12128/22386 |
DOI: | 10.3390/nano12020259 |
ISSN: | 2079-4991 |
Pojawia się w kolekcji: | Artykuły (WNŚiT) |
Plik | Opis | Rozmiar | Format | |
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Pawlik_luminescence_of_sio2_baf2tb3.pdf | 2,07 MB | Adobe PDF | Przejrzyj / Otwórz |
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