Upconversion properties of Gd-based ceramics, attached into polystyrene films
| Autor: | A. Carro-Gastélum, S. Carmona-Téllez, S. Loera-Serna, L. Mariscal-Becerra, H. Murrieta S, G. Alarcón-Flores, C. Falcony |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Analytical chemistry Oxide chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Photon upconversion Ion chemistry.chemical_compound Crystallinity Thulium chemistry visual_art 0103 physical sciences visual_art.visual_art_medium Polystyrene Ceramic 0210 nano-technology Luminescence |
| Zdroj: | Journal of the Australian Ceramic Society. 57:21-27 |
| ISSN: | 2510-1579 2510-1560 |
| Popis: | Tm3+- and Yb3+-doped lithium-gadolinium oxide (Li-Gd2O3) ceramics, prepared by the simple evaporation technique, were incorporated into polystyrene (PS) films (as recycled Styrofoam). A study of the upconversion (UC) emission from Tm3+ as well as Yb3+ ions was performed under continuous wave excitation of a 980-nm laser, for both powder and PS film samples. High-intensity light emissions (UC) were observed at 476, 488, and 665 nm, associated with inter electronic energy state transitions of the Tm3+ ion, from 1D2 to 3F4, 1G4 to 3H6, and 3F3 to 3H6, respectively. Yb3+ presence makes possible the thulium blue emission in the UC luminescence because it acts as a sensitizer under 980-nm excitation. Lithium is used as part of the host lattice (Lix-Gd2-xO3; 0 ≤ x ≥ 1) in order to achieve a greater crystallinity as Li+ acts as fluxing agent. The PS films remain highly transparent in the light’s visible region even after the incorporation of the ceramic particles (around 80% T). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink