| Full text | |
| Author(s): |
Capelo, Renato Grigolon
;
Baltieri, Ricardo Santos
;
de Oliveira Jr, Marcos
;
Manzani, Danilo
Total Authors: 4
|
| Document type: | Journal article |
| Source: | ACS OMEGA; v. 8, n. 38, p. 9-pg., 2023-09-13. |
| Abstract | |
Tellurite glasses have garnered considerable interest as optical host materials due to their advantageous properties, including low processing temperature, high resistance to corrosion and crystallization, and excellent solubility for rare earth ions. However, their applicability in the infrared (IR) region is limited by the absorption of species with distinct vibrations. The incorporation of fluorides has emerged as a promising approach to reduce hydroxyl (OH) absorption during the precursor melting process. In this study, we investigated the influence of ZnF2 on a glass matrix composed of TeO2-ZnO-Na2O, resulting in notable changes in the glass structure and optical properties, with Eu3+ serving as an environmental optical probe. The samples underwent comprehensive structural, thermal, and optical characterization. Structural analyses encompassed F-19 and Te-125 nuclear magnetic resonance (NMR), with the latter being complemented by mathematical simulations, and these findings were consistent with observations from Raman scattering. The main findings indicate an enhancement in thermal stability, modifications in the Te-O connectivity, and a reduction in emission intensity attributed to the effects of ligand polarizability and symmetry changes around Eu3+. Additionally, the fluorotellurite matrices exhibited a shift in the absorption edge toward higher energies, accompanied by a decrease in mid-IR absorptions, thereby expanding the transparency window. As a result, these glass matrices hold substantial potential for applications across various regions of the electromagnetic spectrum, including optical fiber drawing and the development of solid-state emitting materials. (AU) | |
| FAPESP's process: | 20/12280-1 - Waveguides based on oxide glasses of heavy atoms for optical sensing of gases in the UV-Vis range |
| Grantee: | Renato Grigolon Capelo |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 21/08111-2 - Development of rare earth based light converters: luminescent markers, optical sensors, and amplifiers |
| Grantee: | Hermi Felinto de Brito |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 20/11038-2 - Multifunctional vitreous materials based on heavy metal oxides and rare-earth-doped oxyfluorides for application in photonics |
| Grantee: | Ricardo Santos Baltieri |
| Support Opportunities: | Scholarships in Brazil - Doctorate |