TY  - JOUR
T1  - Luminescence and Lifetime of CaO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub> : Yb<sup>3+</sup> and CaO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>: Ce<sup>3+</sup>
Rare-Earth-Doped Borate Glasses
AU - Barrera, G.R. AU - Novais, A.L.F. AU - Almeida, A.S. AU - Souza, L.F. AU - Abreu, C.M. AU - Galindo, F.T. AU - Ferreira, F.C.L. AU - Souza, N. 
JO  - Journal of Engineering and Applied Sciences
VL  - 15
IS  - 4
SP  - 932
EP  - 937
PY  - 2020
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2020.932.937
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2020.932.937
KW  - Excitation
KW  -luminescence
KW  -spectra and fluorescence
KW  -life time of the rare-earths
KW  -ions
KW  -characterization
AB  - This recherche aimed to investigate the characteristics related to the photo luminescence properties
of borate glasses CaO-Al<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub> doped with 1.0% of Yb<sup>3+</sup> and Ce<sup>3+</sup>. 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 <sup>2</sup>F<sub>5/2</sub>&rarr; and 5d&rarr;4 ftransitions for Yb and Ce dopant, respectively.
ER  -