Upconversion fluorescence in Nd 3+ /Yb 3+ co-doped titanate glasses prepared by containerless method

作者: Xiuhong Pan , Jianding Yu , Yan Liu , Minghui Zhang

DOI: 10.1557/JMR.2011.365

关键词:

摘要: Nd3+/Yb3+ co-doped TiO2-La2O3 glasses modified by ZrO2 were fabricated containerless method. Under the excitation of 980 nm lasers, three intense emissions centered at 521, 545, and 655 observed, which are assigned to Nd3+; 4G9/2 → 4I9/2, 4G7/2 4I13/2 transitions, respectively. Besides, two very weak emission bands 496 603 also found due Nd3+ transition 2G9/2 4I9/2 4G5/2 (or 2G7/2) Pumping powder dependence intensity suggests a two-photon adsorption process responsible for upconversion luminescence. A combined phonon-assisted cooperative sensitization mechanism is presented interpret energy transfer from Yb3+ ions. In addition, highest luminescence was glass with 1.2 mol% Nd3+, efficiency can be enhanced increasing content.

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