XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
275
T4: P–8
Structural and spectroscopic properties of lead phosphate glasses
doubly doped with Tb
3+
and Eu
3+
ions
Marta Sołtys
1
, Joanna Pisarska
1
, Magdalena Leśniak
2
, Maciej Sitarz
2
,
and Wojciech A. Pisarski
1
1
University of Silesia, Institute of Chemistry, Szkolna 9, 40-007 Katowice, Poland,
e-mail: marta.soltys@us.edu.pl
2
AGH University of Science and Technology, Faculty of Materials Science and Ceramics,
Mickiewicza Av., 30-059 Cracow, Poland
Lead phosphate glass belongs to inorganic systems, which are interesting from the structural
point of view [1–4]. It is interesting to see that four different phosphate tetrahedral sites that can
exist in phosphate glasses and they are attributed to the Q
n
(n = 0–3 and denotes the number of
bridging oxygen per PO
4
tetrahedron) species [5]. Additionally, these glasses are also excellent
solid-state systems to incorporate lanthanide ions (Ln
3+
). Among lead phosphate glasses with
rare earth ions the most interesting are trivalent europium and terbium ions in view of
spectroscopic properties [6–8]. Glasses containing Tb
3+
ions are known as green emitters, due to
5
D
4
–
7
F
5
transitions (543 nm), whereas glass systems doped with Eu
3+
ions demonstrate intense
and efficient red emission (611 nm) related to the
5
D
0
–
7
F
2
transition. Spectroscopic
investigations of the lead phosphate based glasses singly doped with Eu
3+
and Tb
3+
are quite
well documented. However, the possible energy transfer processes between Ln
3+
(Ln = Eu and
Tb) in these doubly doped glass systems were not earlier examined. For that reason, new
multicomponent lead phosphate glasses doubly doped with Tb
3+
and Eu
3+
ions with various
PbO:P
2
O
5
molar ratios were prepared and then studied using different spectroscopic techniques.
In the first part of our research, the fourier transform infrared (FT-IR) and Raman spectroscopy
was used to verify local structure of glass-network. The FT-IR and Raman spectra clearly
indicate that different structural phosphate groups are present in PbO-P
2
O
5
based glasses.
Moreover, the areas of the FT-IR and Raman bands strongly depend on the relative ratio of PbO
and P
2
O
5
components. The second part of work includes the studies of luminescence properties
of lead phosphate glasses. Excitation and emission spectra for Eu
3+
and Tb
3+
ions in PbO-P
2
O
5
glasses were registered. Several emission bands associated to characteristic transitions of
trivalent europium and terbium are observed under direct excitation of Tb
3+
. It indicates that the
energy transfer process from Tb
3+
to Eu
3+
in lead phosphate glass occurs. Spectroscopic
parameters like
5
D
0
(Eu
3+
) and
5
D
4
(Tb
3+
) lifetimes were determined. Dependence of
spectroscopic parameters on the increase of PbO:P
2
O
5
molar ratio from 1:5 to 5:1 in glass
composition was established.
Keywords: lead phosphate glasses; structural properties; energy transfer
Acknowledgment
The National Science Centre (Poland) supported this work under research project 2015/17/B/ST7/03730.
References
[1] G. Little Flower, M. Srinivasa Reddy, G. Sahaya Baskaran, N. Veeraiah, Opt. Mater. 30 (2007) 357.
[2] K. El-Egili, H. Doweidar, Y.M. Moustafa, I. Abbas, Physica B 339 (2003) 237.
[3] H.S. Liu, T.S. Chin, Phys. Chem. Glasses 38 (1997) 123.
[4] R. Praveena, V. Venkatramu, P. Babu, C.K. Jayasankar, Physica B 403 (2008) 3527.
[5] R.K. Brow, J. Non-Cryst. Solids 263/264 (2000) 1.
[6] W.A. Pisarski, L. Żur, M. Sołtys, J. Pisarska, J. Appl. Phys. 113 (2013) 143504.
[7] W.A. Pisarski, L. Żur, T. Goryczka, M. Sołtys, J. Pisarska, J. Alloy. Compd. 587 (2014) 90-98.
[8] L. Żur, M. Sołtys, T. Goryczka, J. Pisarska, W.A. Pisarski, J. Mol. Struct. 1075 (2014) 605.
XIV
h
International Conference on Molecular Spectroscopy, Białka Tatrzańska 2017
276
T4: P–9
The influence of Ag content and annealing temperature on structural
and optical properties of SGS glass doped with Eu
3+
ions
Renata Jadach
1
, Marcin Kochanowicz
2
, Jacek Żmojda
2
, Piotr Miluski
2
,
Maciej Sitarz
1
, and Dominik Dorosz
1
1
University of Science and Technology in Krakow, Faculty of Materials Science and Ceramics al.
Mickiewicza 30, 30-059 Kraków, Poland, e-mail: rjadach@agh.edu.pl
2
Bialystok University of Technology, Faculty of Electrical Engineering Wiejska, 45D, 15-351
Bialystok, Poland
The effect of metallic nanoparticles (NPs) on the photoluminescence of rare-earth (RE) ions
in glassy networks has been widely investigated. The reason is that the collective oscillation of
the noble metal electrons resonantly excited by visible light causes a tremendous enhancement
of the electromagnetic near-field in the vicinity of nanoparticles. If this phenomenon, called
surface plasmon resonance (SPR), exists in inorganic glasses doped with RE ions, the
luminescence signal may be amplified or quenched. In practice, the proper selection of glassy
matrix leads to effective nanoparticles creation. Among oxide glasses, germanate glasses are
widely used as host material because of their good thermal stability, good solubility of rare earth
ions and chemical durability [1]. Silicate glasses possess good thermal stability against
crystallization and stable physical and chemical properties [2]. Antimony glasses are
characterized by high refractive index and low phonon energy [3]. All mentioned properties are
crucial for optical fiber manufacturing, hence the Authors idea is to fabricate glass with
composition Sb
2
O
3
-GeO
2
-SiO
2
-Na
2
O-Al
2
O
3
and dope them with Eu
3+
ion and AgNO
3
. The main
research is focused on the influence of the amount of Ag ions and annealing temperature on
luminescence efficiency of europium ions and correlation between structural and luminescent
properties of received glasses.
Following investigation of prepared glass structure were executed: X-ray Diffraction
(Panalytical Empyrean powder diffractometer using Cu Kα (λKα = 1.54186 Å)), SEM/EDS
(SEM-FEI Nova 200 NanoSEM), FTIR spectra (Bruker Company Vertex 70v spectrometer and
Horriba Yvon Jobin LabRAM HR micro-Raman spectrometer), Raman spectra (Horriba Yvon
Jobin LabRAM HR micro-Raman spectrometer equipped with a CCD detector). Luminescence
spectra of examined samples were obtained with use of Acton Spectra Pro 2300i
monochromator in the range of 550–750 nm and laser diode λ
exc
= 395nm.
Keywords: structural properties; europium ions; silver nanoparticles; surface plasmon resonance,
Acknowledgment
The project was funded by National Science Centre (Poland) granted on the basis of the decision No. DEC-
2016/21/D/ST7/03453.
References
[1] S. Yu, Z. Yang, S. Xu, Optical Materials 31 (2009) 1723.
[2] R. Cao, Y. Lu, Y. Tian, Optics and Laser Technology 94 (2017) 106.
[3] K. Ouannes, K. Lebbou, B. M. Walsh, Optical Materials 65 (2017) 8.
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