7 / 38
Page 93
Notes:
conferenceseries
.com
Volume 5, Issue 5
Res. Rev. J Mat. Sci. 2017
ISSN: 2321-6212
Advanced Materials 2017
September 07-08, 2017
September 07-08, 2017 | Edinburgh, Scotland
Advanced materials & Processing
11
th
International Conference on
Luminescence of Mn
2+
and Eu
3+
doped zinc phosphate glass
H. Murrieta-Sánchez, H. Félix-Quintero, J. Hernández A, E. Camarillo
and
G. C. Flores J.
Universidad Nacional Autónoma de México, México
W
e report the photoluminescence (PL) of Mn
2+
and Eu
3+
doped zinc phosphate glass as melted. Raman and Energy-Dispersive
X-ray Spectroscopy (EDS) were also used to get a better characterization. During the synthesis process the Mn
2+
ions occupy
tetrahedrally coordinated (IVMn
2+
) sites in the glass, but also partially precipitate on octahedral sites (VIMn
2+
) giving rise to the
simultaneous green and red luminescence, due to the spin-forbidden 4T1(G)→6A1(S) and 4T1g(G)→6A1g(S) transitions in IVMn
2+
and VIMn
2+
respectively. Electron Paramagnetic Resonance (EPR) and lifetime measurements were also used to establish the presence
of manganese ions in octahedral/tetrahedral coordination. The absorption transition 6A1(S) →4E(D) of Mn
2+
centered at 350 nm
can produce red luminescence, while the transition 6A1(S)→4A1(G) of Mn
2+
centered at 409 nm produces a green and red dual
luminescence that is dependent on manganese concentration in the glass, being the green luminescence the dominant one. On the
other hand the presence of Eu
3+
produces also a red luminescence around 612nm due to the transition 5D0 →7F2. The manganese
and europium ions form next pairs whose interaction gives rise to an increase in the europium red emission and an energy transfer
process between both ions.
Biography
Since he was a student his passion has been for Solid State Physics, in particular for magnetic and optical properties of impurity ions in solid materials. He has
worked on these themes in several laboratories around the world: Centro Brasileiro de Pesquisas, Río de Janeiro and University of San Carlos, University of San
Pablo both in Brazil. MIT, Boston, Mass. USA. Clarendon Laboratories, Oxford, England. Autonomus University of Madrid, Spain. Metropolitan University, México
City and his home Universidad Nacional Autonoma de Mexico (UNAM). His work has been mainly on crystals such as LiNbO3, BiGeO, BiSiO, HfO2, Alkali Halides
and recently on metaphosphate glasses impurified with a large variety of rare earth and transition metal ions. The results have been used to get knowledge about
the structure of several crystal defects. The results have been published in more than 100 papers.
hectormesser@gmail.com murrieta@fisica.unam.mxH. Murrieta-Sánchez et al., Res. Rev. J Mat. Sci. 2017, 5:5
DOI: 10.4172/2321-6212-C1-006