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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.)

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

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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]
Total Authors: 7
[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
Total Affiliations: 6
Document type: Journal article
Source: Journal of Luminescence; v. 199, p. 454-460, JUL 2018.
Web of Science Citations: 1

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)

FAPESP's process: 17/11301-2 - Rare earth doped micro and nanostructures luminescent materials: properties and applications
Grantee:Rogéria Rocha Gonçalves
Support type: Regular Research Grants