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- Title
EFFICIENT GREEN UPCONVERSION EMISSION IN TRANSPARENT TEO<sub>2</sub>-GEO<sub>2</sub> GLASS-CERAMIC OBTAINED BY BILLET EXTRUSION.
- Authors
Lesniak, Magdalena; Jiménez, Lesly G.; Starzyk, Bartłomiej; Szymczak, Patryk; Vázquez-López, Carlos; Kochanowicz, Marcin; Kuwik, Marta; Pisarska, Joanna; Pisarski, Wojciech A.; Dorosz, Dominik
- Abstract
Transparent Yb3+/Er3+ glass-ceramic was successfully obtained by the extrusion method. The extrusion of oxyfluoride tellurite-germanate glass co-doped with Yb3+ and Er3+ ions at 520 ℃ resulted in the formation of Ba0.75Er0.25F2.25 nanocrystals, leading to an increase in the upconversion (UC) emission intensity of 35 times in glass-ceramic with respect to the glass. The glass to glass-ceramic transition was confirmed by X-ray diffraction (XRD) and Transmission electron microscope (TEM). Also, the structural changes that occurred during crystallization were assessed using Fourier-transform infrared (FTIR) spectroscopy. Furthermore, the pump power and temperature UC emission dependence of glass and glass-ceramic under 976 nm laser excitation were investigated in detail. The assessments showed that i) two-phonons are involved in the UC process and ii) the temperature has a significant influence over it. The Yb3+/Er3+ codoped glass-ceramic shows relatively high Sa and Sr values in a wide temperature range from 300 to 573 K, presenting the maximal Sa value of 3.50 × 10-3 at 573 K and the maximal Sr value of 6.30 × 10-3 at 364 K. These results suggest that the glass-ceramic is a good candidate for optical applications such as luminescent thermometry.
- Subjects
GLASS-ceramics; PHOTON upconversion; TRANSMISSION electron microscopes; GLASS transitions; X-ray diffraction
- Publication
Metrology & Measurement Systems, 2024, Vol 31, Issue 1, p37
- ISSN
2080-9050
- Publication type
Article
- DOI
10.24425/mms.2024.148540