Abstracts Book - IMRC 2018

• SD7-P049
PHOTOLUMINISCENT PROPERTIES EFFECTS OF ERBIUM-DOPED
GLASSES FROM TERNARY SYSTEM CdO-V2O5-P2O5
Universidad de Puebla 1 , Rosendo Leovigildo Lozada Morales 2 , Abraham N. Meza Rocha 2 , Ulises
Caldiño 3
1 Benemerita Universidad Autonoma de Puebla, FCFM BUAP, Mexico. 2 Benemerita Universidad
Autonoma de Puebla, FCFM, Mexico. 3 Universidad Autónoma Metropolitana, , Mexico.
In this work has been proposed the analysis of a novel matrix composed by CdO-
V2O5-P2O5 doped with Erbium (Er 3+ ) ions, in order to analyze its photoluminescence
properties for potential applications in lasers, solar cells optical communications
etc. It is well known that Er 3+ possesses several electronic levels in the IR-visible
region. Particularly, the 4 I13/2, 4 I11/2 y 4 I9/2 levels are symmetrically spaced in the IR
region and match with the emissions of commercial 1534, 980 y 806 nm laser
diodes, respectively.
Recently, it has been found that the CdO-V2O5-P2O5 system remains amorphous at
large content of CdO (80.0 mol%). Thus, the host composition was 90-5-5 % mol of
CdO-V2O5-P2O5, respectively. The Er 3+ content was varied 0.5 to 4.0 mol% regarding
the host composition by using Er nitrate as source. The starting precursors were
melted at 1200 °C in a high alumina crucible for one hour and poured onto a
stainless steel mold at room temperature in order to induce a thermal shock. The
structural analysis performed by X-Ray diffraction patterns and Raman
Spectroscopy reveals amorphous phases in all cases according with the lack of
diffraction peaks and the broad vibrational bands located at 850, 637 and 355 cm -1 ,
related to Cd2V2O7 in amorphous phase. By optical absorption was possible to
identify the typical Er 3+ transitions and estimate the band gap energy values (Eg=
2.45-2.58 eV) by the Tauc’s Method, which are reduced as Er3+ is incorporated. Such
fact is associated with Non-bonding oxygens . The up-conversion emissions upon
980 nm laser excitation, display the Er 3+ emissions located at 521, 541 and 660 nm,
attributed to the 2 H11/2 → 4 I15/2, 4 S3/2 → 4 I15/2 y 4 F9/2 → 4 I15/2 transitions, respectively.
The down conversion emission spectra show a broad band centered at 1532 nm,
related to the 4 I13/2 → 4 I15/2 transition. Both emissions reach their optimum intensity
at 2.5 mol% of Er 3+ , at higher contents the emission intensity gradually decreases.
This behavior is most likely due to cross relaxation processes, which promote nonradiative
transitions, as is suggested by the emission decay profiles at 1532 nm
Keywords: Photoluminiscence, Rare earths, Glasses
Presenting authors email: k_eri13@hotmail.com