Synthesis and Photoluminescence of Rhombic NaLa(MoO4)2:Ln3+ Nanocrystals
| Autor: | Yuping Wang, Rong Li, Naiying Fan, Guofeng Wang, Kai Pan, Mingxia Li |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Photoluminescence Dopant Scanning electron microscope Biomedical Engineering Analytical chemistry Bioengineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hydrothermal circulation 0104 chemical sciences symbols.namesake Nanocrystal symbols General Materials Science Emission spectrum 0210 nano-technology Luminescence Raman spectroscopy |
| Zdroj: | Journal of nanoscience and nanotechnology. 16(4) |
| ISSN: | 1533-4899 |
| Popis: | Rhombic NaLa(MoO4)2:Ln3+ (Ln = Eu and Tb) nanocrystals were synthesized by a hydrothermal method. The structures and morphologies of the nanocrystals were characterized by X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. The results indicated that the crystalline size increased with increasing Na2MoO4 content. The photoluminescence properties of NaLa(MoO4)2:Ln3+ nanocrystals were investigated in detail. In the emission spectra of NaLa(MoO4)2:Eu3+ nanocrystals, the 5D0 → 7F2 is dominant, and the peak positions and spectral shapes of emissions were independent of Eu3+ concentration. The luminescence intensity increased with increasing Eu3+ concentration, up to about 10 mol%, and then decreased. In the emission spectra of NaLa(MoO4)2:Tb3+ nanocrystals, the 5D4 → 7F5 is dominant. The sample with a dopant concentration of 20 mol% showed the highest emission intensity. |
| Databáze: | OpenAIRE |
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