| Autor: |
Yang, Chen, Fan, Chenli, Hussain, Fayaz, Sheng, Weiqing, Song, Kaixin, Wu, Jun, Huang, Qingming, Su, Weitao, Xu, Junming, Sun, Shikuan, Wang, Dawei |
| Zdroj: |
Journal of Rare Earths; 20220101, Issue: Preprints |
| Abstrakt: |
La2Mg1–x/2Zr1–x/2O6:xBi3+(x=0.01–0.035, abbreviated as LMZ:Bi3+), La2–yMg0.99Zr0.99O6:0.02Bi3+,yEu3+(y= 0.1–0.11, abbreviated as LMZ:Bi3+,Eu3+) double-perovskite phosphors were prepared through high-temperature solid-phase method. The emission spectrum of LMZ:xBi3+(x=0.01–0.035) phosphors excited at 353 nm is asymmetric with the range between 375–650 nm, showing strong green light. There are two luminescent centers of [Mg1/Zr2-O6] and [Mg2/Zr1-O6] for Bi3+occupation, which are analyzed through different excitation wavelengths, Gaussian fitting peaks, fluorescence decay curves and Rietveld refinement of powder X-ray diffraction data. Through deep-study of the luminescent lattices in the LMZ matrix, the green to blue tunning-emission is observed by different excitation wavelengths. In addition, red emission is obtained by co-doping Bi3+/Eu3+, and adjustable emission was investigated by changing the content of Eu3+in the co-doped phosphor formulation, so it is converted from green emission to red emission. The above results demonstrate how to tune emission color by co-doping rare earth ions in the double perovskite phosphor, which is attractive for future applications. |
| Databáze: |
Supplemental Index |
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