Making yttrium orthovanadate a better color emission host: Case study of hollow-like nanocrystals
| Autor: | Minglei Zhao, Liusai Yang, Yunjian Wang, Leshu Yu, Siyan Peng |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Photoluminescence
Materials science Band gap Doping Biophysics Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry Crystal structure Yttrium 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry.chemical_compound Tetragonal crystal system chemistry Yttrium orthovanadate 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of Luminescence. 205:548-554 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2018.09.049 |
| Popis: | Novel Eu3+-doped YVO4 hollow-like nanocrystals were constructed via initiating homogeneous precipitation followed by a hydrothermal treatment. The phase structure, microstructure, band gap, and fluorescence performance of the hollow-like nanocrystals were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Uv–Vis diffusion reflectance spectra (Uv–Vis), and photoluminescence spectroscopy (PL). The results showed that all prepared samples were well crystallized in tetragonal YVO4 structure regardless of the doping concentration of Eu3+ ions from 0 to 15 mol%. TEM showed that all samples are composed of hollow-like nanocrystals with average diameters of about 20 nm, exhibiting a large-scale uniform morphology. A linear lattice expansion was observed due to evenly distributed of Eu3+ ions in the YVO4 crystal lattice matrix. The bandgap energy Eg showed a red-shift below the doping level of 3 mol% of Eu3+ ions. More importantly, YVO4 nanocrystals with hollow-like structure have a higher quenching Eu3+ ions concentration up to 10 mol%, compared to 5 mol% of the bulk YVO4 host. Furthermore, the tunable color emission from blue to white to red can be achieved in hollow-like YVO4 nanocrystals by controlling the doping concentration of Eu3+ ions. The nanocrystals with hollow-like structure reported in this work are very important, which may pave a new route to better the yttrium orthovandate host and further realize color tunable emission for laser, optoelectronics, and biomedical applications. |
| Databáze: | OpenAIRE |
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