Photoluminescence study of Sm3+-Yb3+ co-doped tellurite glass embedding silver nanoparticles

Autor(es)

Reza Dousti, M. ^{[1, 2, 3]} ; Amjad, R. J. ^{[3, 4]} ; Hosseinian, R. S. ^[3] ; Salehi, M. ^[3] ; Sahar, M. R. ^[3]

Afiliação do(s) autor(es)

^[1] Islamic Azad Univ, Tehran North Branch, Dept Phys, Tehran - Iran

^[2] Univ Sao Paulo, Inst Fis Sao Carlos, Lab Espectroscopia Mat Func LEMAF, BR-13566590 Sao Carlos, SP - Brazil

^[3] Univ Teknol Malaysia, Fac Sci, Dept Phys, Skudai 81310 - Malaysia

^[4] Inst Informat Technol, COMSATS, Dept Phys, Lahore 54000 - Pakistan

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 159, p. 100-104, MAR 2015.
• Citações Web of Science: 14

Resumo

We report on the upconversion emission of Sm3+ ions doped tellurite glass in the presence of Yb3+ ions and silver nanoparticles. The enhancement of infrared-to-visible upconversion emissions is achieved under 980 nm excitation wavelength and attributed to the high absorption cross section of Yb3+ ions and an efficient energy transfer to Sm3+ ions. Further enhancements are attributed to the plasmonic effect via metallic nanoparticles resulting in the large localized field around rare earth ions. However, under excitation at 406 nm, the addition of Yb3+ content and heat-treated silver nanoparticles quench the luminescence of Sm3+ ions likely due to quantum cutting and plasmonic diluent effects, respectively. (C) 2014 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
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado