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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

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Autor(es):
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]
Número total de Autores: 6
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Journal of Non-Crystalline Solids; v. 429, p. 70-78, DEC 1 2015.
Citações Web of Science: 16
Resumo

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)

Processo FAPESP: 13/24064-8 - Estudos estruturais e fotofísicos de vidros fosfato de tungstênio dopados com íons terras raras e nanopartículas metálicas
Beneficiário:Mohammad Reza Dousti
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
Beneficiário:Edgar Dutra Zanotto
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs