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Laser Optics & Photonics and Atomic & Plasma Science 2018
J u l y 1 6 - 1 7 , 2 0 1 8
P r a g u e , C z e c h R e p u b l i c
Page 72
American Journal of Computer Science and Information Technology
ISSN: 2349-3917
E u r o S c i C o n J o i n t E v e n t o n
Laser Optics & Photonics and
Atomic & Plasma Science
R
are earths (RE) are widely explored to develop luminescent materials which may find use in such applications as lasers,
optical markers, phosphors, semiconductor materials and X-ray detectors. Rare earth sulfonates have attracted attention
because they can be obtained with simple and cost-effective methods for potential technological applications as luminescent
thin films. The characteristic features of the electronic spectroscopy of the RE3+ ions include the narrow emission lines and long
lifetimes due to the intra configurational 4f–4f transitions. The oxysulfides and oxysulfate (RE
2
O
2
S/RE
2
O
2
SO
4
) of rare earth has
been widely exploited as optical materials due to their applicability and easy production. Recently, the oxysulfates and oxysulfides
has being largely used as Tb3
+
(green), Eu3
+
(red) and Dy3
+
(yellow/blue) colors ions. In this work, the Gd
2
O
2
SO
4
:Tb3
+
optical
material was obtained by thermal decomposition of sulfate hydrated under air atmosphere The photo luminescent investigation
of Gd
2
O
2
SO
4
:Tb3
+
material showed that the brightness of terbium-activated gadolinium oxysulfate phosphors was enhanced
with increase of the concentration of Tb3
+
and the distributions of size particles were decreased with controlling by doping the
phosphor. The structure and purity was confirmed with XPD powder diffractions according JCPDS # 41-0684. The Gd
2
O
2
SO
4
: is a
good host to Tb3
+
and ions exhibit better intensity of transitions in the
5
D
4
-->
7
F
2
narrow lines monitored at 545,5 nm.
References
1. Kai, M C F C Felinto, L A O Nunes, O L Malta, H F Brito (2011) J Mater Chem 21 3796.
2. L Song, P Du, Q Jiang, H Cao, J Xiong (2014) J Lumin 150: 50–54.
3. L Song, X Shao, P Du, H Cao, Q Hui, T Xing, J Xiong (2013) Mater. Res. Bull.11 4896–4900.
4. R V Rodrigues, L Marciniak, L U Khan, J R Matos, H F Brito, W Strȩk (2016) J. Rare Earth, 34 (8): 814-819
The effect of Tb3
+
ions concentration on the morphology,
structure and photoluminescence of Gd
2
O
2
SO
4
: Tb3
+
phosphor
obtained by thermal decomposition of sulfate hydrated
R V Rodrigues
1,4
, L Marciniak
2
, L U Khan
3
, A A L Marins
4
,
R Tomala
2
, J R Matos
1
, W Strek
2
and E J B Muri
4
1
Institute of Chemistry, University of Sao Paulo, Brazil
2
Institute of Low Temperature and Structure Research, University of Wrocław, Poland
3
Brazilian Nanotechnology NationalLaboratory (LNNano), Brazil
4
Federal University of Espirito Santo, Brazil
R V Rodrigues et al., J Food Nutr Popul Health 2018, Volume: 2
DOI: 10.21767/2577-0586-C1-003
Biography
Rodrigo V Rodrigues has completed his PhD at the São Paulo University (USP), São Paulo, Brazil. He is the collaborator of Thermal Analysis Laboratory (USP) and the Institute of
Low Temperature Structure and Research INTIBS-PAN, Wroclaw, Poland. His research work includes developing materials using the TG/DTG/DSC Thermal Analysis Techniques
and TG/MS in the part of obtaining and characterizing the application of thermogravimetry to obtain nanomaterial and luminescent materials, studying kineticmethods (Ozawa) in
determining the time of life of compounds and in the study of photoluminescence applications of the excitation and emission spectra of the luminescence of rare earth elements
RE. He has published some papers in reputed journals and has been serving as an Editorial Board Member of repute. He has collaborations with São Paulo University USP, Brazil;
Turku University, Finland and Institute of Low Temperature of Wroclaw – INTIBS – Poland.
rodv16429@hotmail.com rodv16429@usp.br