Silver Nanoparticles Enhance Thermoluminescence and Photoluminescence Response in Li 2 B 4 O 7 Glass Doped with Dy 3+ and Yb 3

• Published in: Journal of fluorescence Vol. 30; no. 1; p. 143
• Main Authors: Vallejo, M A, Elias, J A, Honorato, M, Ceron, P V, Gomez-Solis, C, Wiechers, C, Navarro, R, Sosa, M
• Format: Journal Article
• Language: English
• Published: Netherlands 01.01.2020
• Subjects: Thermoluminescence intensity; Kinetic parameters; Glass matrices; Yb3; Borate; Silver nanoparticles; Dy3
• ISSN: 1573-4994

Lithium borate glass matrices doped with Dy and Yb , containing silver nanoparticles in different concentrations are synthesized and characterized in this work. The Scanning Transmission Electron Microscopy confirms formation of silver nanoparticles in the samples. Absorption spectra of the samples show the presence of a broadband spectrum associated due to the surface plasmon effect of the silver nanoparticles. A strong surface plasmon band bellow 400 nm appears after the annealing process, due to the formation of silver nanoparticles with radius of 5-15 nm. The transition peaks of Dy are also observed at 386, 446, 798, 917, 1088, 1265 and 1669 nm. Additionally, a large peak at 976 nm belonging to the absorption band corresponding to the Yb is observed. Emission spectra under 406 nm pumping show two prominent bands at 506 and 590 nm belonging to the Dy transitions F  →  H and F  →  H , respectively. The fluorescence in the 480 nm and 525 nm spectral ranges enhanced with the silver nanoparticles contained in the samples. Is the first time, the luminescence studies of the lithium borate matrix doped with Dy and Yb containing silver nanoparticles is done. The basic parameters defining the lasing-amplifying potential of the glass matrices as a function of silver nanoparticles concentration are calculated. The Thermoluminescence response to UV irradiation also exhibits significant enhancement with the increment of silver nanoparticles in the samples.