Authors : G.R. Barrera, A.L.F. Novais, A.S. Almeida, L.F. Souza, C.M. Abreu, F.T. Galindo, F.C.L. Ferreira and N. Souza
Abstract: This recherche aimed to investigate the characteristics related to the photo luminescence properties of borate glasses CaO-Al2O3-B2O3 doped with 1.0% of Yb3+ and Ce3+. These glasses were prepared by using a melt-quenching technique and characterized through X-Ray Diffraction (XRD) and Fourier-transform infrared spectroscopy and photo luminescence and decay spectral studies to determine the feasibility of using these glasses as luminescent devices in the visible region. The XRD standard confirmed the amorphous nature of the prepared glasses. By means of the infrared spectra the vibrational characteristics of the borate glass groups were verified. The characterization showed that the levels of rare-earth ions did not compromise the structural properties of the glassy matrixes. Excitation and luminescence spectra and fluorescence lifetime of the rare-earths ions were also detected. The excitation and emission spectra of both glasses show a broad PL profile due to the 2F5/2→ and 5d→4 ftransitions for Yb and Ce dopant, respectively.
G.R. Barrera, A.L.F. Novais, A.S. Almeida, L.F. Souza, C.M. Abreu, F.T. Galindo, F.C.L. Ferreira and N. Souza, 2020. Luminescence and Lifetime of CaO-Al2O3-B2O3 : Yb3+ and CaO-Al2O3-B2O3: Ce3+ Rare-Earth-Doped Borate Glasses. Journal of Engineering and Applied Sciences, 15: 932-937.