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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Er3+-doped zinc tellurite glasses revisited: Concentration dependent chemical durability, thermal stability and spectroscopic properties

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Dousti, M. R. [1] ; Amjad, R. J. [2] ; Sahar, M. R. [3] ; Zabidi, Z. M. [4] ; Alias, A. N. [4] ; de Camargo, A. S. S. [1]
Total Authors: 6
[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil
[2] COMSATS Inst Informat Technol, Dept Phys, Lahore 54000 - Pakistan
[3] Univ Teknol Malaysia, Fac Sci, Dept Phys, Adv Opt Mat Res Grp, Skudai 81310 - Malaysia
[4] Univ Teknol Mara Cawangan Pulau Pinang, Dept Appl Sci, Permatang Pauh 13500, Pulau Pinang - Malaysia
Total Affiliations: 4
Document type: Journal article
Source: Journal of Non-Crystalline Solids; v. 429, p. 70-78, DEC 1 2015.
Web of Science Citations: 15

Tellurite glasses are interesting materials with extensive infrared transmission window, relatively low phonon energy, high refractive indexes and the ability to incorporate reasonably high amount of rare earth ion dopants. These characteristics make them popular candidates for infrared and visible emissions. Particularly, Er3+-doped tellurite glass compositions have been actively studied for broadband near infrared applications where the requirement for low dimension needs to be compensated by higher doping ion concentration. In this work, we revisit Er3+-doped zinc tellurite glasses, which are among the most thermally and chemically stable tellurite compositions. The glasses were prepared by the melt-quenching technique and the favorable effects of increasing dopant concentration on chemical durability, water resistivity and thermal stability (up to 140 degrees C) are discussed. The photophysical properties of the glasses were studied by absorption and luminescence spectroscopic techniques. The Stokes and anti-Stokes emissions of erbium were analyzed and it was verified that the width of the emission band at 1532 nm strongly depends on Er3+ concentration varying from 60 to 82 nm for 0.5 and 2.5 mol% of Er2O3, respectively. The intensity of green and red upconversion emissions was evaluated and the increased efficiency of red emission with increasing concentration is attributed to energy transfer mechanisms between infrared energy levels. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/24064-8 - Structural and photophysical studies of tungsten phosphate glasses doped with rare earth ions and metallic nanoparticles
Grantee:Mohammad Reza Dousti
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC