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- Title
Yb<sup>3+</sup> 共掺杂 La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub>:Er<sup>3+</sup> 上转换发光材料的水热合成与性能.
- Authors
黄一男; 李 娟; 李慧玲; 李蓝苹; 陈雪羽; 杨锦瑜
- Abstract
Yb3+ co-doped La2Sn2O7: Er3+ crystals were successfully synthesized by hydrothermal method. The influence of the Yb3+ doping content and the pH of the reaction system on the phase structures, morphologies, and optical properties of the as-synthesized Yb3+ co-doped La-Sn207: Er3+ crystals are characterized by X-ray powder diffraction (XRD) , scanning electron microscope (SEM) , Fourier infrared spectrum (FT-IR) , Ultraviolet visible diffuse reflection spectrum (UV-Vis) and up-conversion luminescence spectroscopy (UPL). The results showed that the Yb3+ doping amount and the pH markedly affected the structure and the up-conversion emission properties of the samples, respectively. The single phase La2Sn2O7 crystals with pyrochlore structure were prepared at pH 13. The results showed that the Yb3+ co-doped La2Sn2O7: 7%Er3+ samples emitted the up-conversion emission peaks of Er3+ at 529, 550 and 665 nm, respectively, under 980 nm near infrared light excitation. The possible up-conversion emission mechanism of the Yb3+ co-doped La2Sn2O7: 7%Er3+ samples was briefly proposed. The emission mechanism for the emission at 529 nm was found to be two-photon absorption-emission. Furthermore, the concentration quenching was observed when the Yb34 doping amount was over 14%.
- Publication
Journal of the Chinese Society of Rare Earths, 2019, Vol 37, Issue 4, p418
- ISSN
1000-4343
- Publication type
Article
- DOI
10.11785/S1000-4343.20190404