| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5399750 | Journal of Luminescence | 2014 | 5 Pages |
Abstract
The Er3+/Yb3+ co-doped NaGd(WO4)2 nanoparticles have been prepared by a simply hydrothermal synthesis procedure. The crystal structures and morphologies of the products were characterized by XRD, SEM and FT-IR spectroscopy. The average grain size of these samples depended on the annealing temperature, increasing with the increase of the temperature. The intense visible upconversion and near infrared luminescence of the Er3+/Yb3+ co-doped NaGd(WO4)2 nanoparticles under 975Â nm excitation could be observed. The luminescence intensities of the samples depended on the size of the nanoparticles and Yb3+ concentration. The transition mechanisms of the upconversion emission can be ascribed to a two-photon absorption process.
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Authors
Xiaochen Yu, Menglei Gao, Jingxin Li, Li Duan, Ning Cao, Ziqiang Jiang, Aibin Hao, Peng Zhao, Jibin Fan,