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

被引：7
作者：
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 ]
机构：
[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
来源：
JOURNAL OF LUMINESCENCE | 2018年 / 199卷
基金：
巴西圣保罗研究基金会;
关键词：
PLANAR WAVE-GUIDES; SOLAR-CELL EFFICIENCY; UP-CONVERSION; SPECTROSCOPIC PROPERTIES; GEL ROUTE; GLASS; LUMINESCENCE; EMISSION; BROAD; NANOCOMPOSITE;
D O I：
10.1016/j.jlumin.2018.03.034
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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.
引用
收藏
页码：454 / 460
页数：7
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