Yb3+ concentration influences UV-Vis to NIR energy conversion in nanostructured Pr3+ and Yb3+ co-doped SiO2-Nb2O5 materials for photonics

Autor(es)

Muscelli, Wesley Cardoso ^[1] ; Aquino, Felipe Thomaz ^{[1, 2]} ; Caixeta, Fabio Jose ^[1] ; Rodrigues Nunes, Lucas Rafael ^[1] ; Zur, Lidia ^{[3, 4, 5, 6]} ; Ferrari, Maurizio ^{[3, 4, 5, 6]} ; Goncalves, Rogeria Rocha ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, Lab Mat Luminescentes Micro & Nanoestruturados Ma, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Univ Fed Mato Grosso, Inst Engn Varzea Grande, Varzea Grande - Brazil

^[3] Museo Stor Fis, Piazza Viminale 1, I-00184 Rome - Italy

^[4] Ctr Studi Ric Enrico Fermi, Piazza Viminale 1, I-00184 Rome - Italy

^[5] CNR, IFN, CSMFO Lab, Via Cascata 56-C, I-38123 Povo, Trento - Italy

^[6] FBK CMM, Via Cascata 56-C, I-38123 Povo, Trento - Italy

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 199, p. 454-460, JUL 2018.
• Citações Web of Science: 1

Resumo

We describe the synthesis of Pr3+/Yb3+ co-doped and Pr3+-doped SiO2-Nb2O5 nanocomposites; we also investigate energy transfer processes between the doping ions, which involve UV-Vis to infrared energy conversion. The emission spectra in the near infrared (NIR) region, 900-1650 nm, indicated energy transfer from Pr3+ to Yb3+ upon blue excitation of the Pr3+ ions. UV charge transfer band excitation elicited efficient Yb3+ emission at about 1.0 mu m. The nanocomposite co-doped with 0.5 mol% Pr3+ and 1.0 mol% Yb3+ provided maximum energy transfer efficiency. The Pr3+ ion P-3(0) excited state lifetime decreased from 11.8 to 3.7 mu s as the Yb3+ ion content in the Yb3+/Pr3+ co-doped nanocomposites increased from 0.25 to 1.0 mol%. This observation attests for energy transfer from Pr3+ to Yb3+ ions. On the basis of these results, Pr3+/Yb3+ co-doped SiO2-Nb2O5 nanocomposites are promising materials for UV-Vis to NIR energy conversion. (AU)

• Processo FAPESP: 17/11301-2 - Materiais luminescentes micro e nanoestruturados dopados com terras raras: propriedades e aplicações
• Beneficiário: Rogéria Rocha Gonçalves
• Modalidade de apoio: Auxílio à Pesquisa - Regular