An efficient synthetic strategy for uniform perovskite core–shell nanocubes NaMgF3:Mn2+,Yb3+@NaMgF3:Yb3+ with enhanced near infrared upconversion luminescence
| Autor: | Meixia Wu, Qinyuan Zhang, Chaolun Liang, Bo Zhou, Xiao-Bao Yang, Wuzong Zhou, Sha Ding, E. H. Song |
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| Přispěvatelé: | University of St Andrews. School of Chemistry, University of St Andrews. EaSTCHEM |
| Rok vydání: | 2018 |
| Předmět: |
Diffraction
Materials science NDAS Nucleation 02 engineering and technology General Chemistry QD Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion Chemical engineering Transmission electron microscopy Phase (matter) Scanning transmission electron microscopy Materials Chemistry Molecule QD 0210 nano-technology Perovskite (structure) |
| Zdroj: | Journal of Materials Chemistry C. 6:2342-2350 |
| ISSN: | 2050-7534 2050-7526 5112-5005 |
| DOI: | 10.1039/c7tc05416e |
| Popis: | This work is financially supported by the National Natural Science Foundation of China (Grant No. 51125005, 51472088, 51602104). Uniform perovskite core-shell nanocubes NaMn1-xMgxF3@NaMgF3 and NaMn1-xMgxF3:Yb3+@NaMgF3:Yb3+ have been successfully synthesized via a facile one-pot co-precipitation method at room temperature. The core-shell structures were carefully characterized by powder X-ray diffraction, transmission electron microscopy, scanning transmission electron microscopy and energy-dispersive X-ray elemental mapping. It was found that the formation mechanisms of the novel core-shell structures consisting of aggregation of precursor molecules/ions, multiple nucleation, surface re-crystallization and further phase transformation. In addition, the DFT calculations further showed that Mn2+ ions tend to aggregate in NaMgF3:Mn2+, and which may be one of important intrinsic factors for formation the unique NaMn1-xMgxF3@NaMgF3 structure in this case. Besides, the unique core-shell structures NaMn1-xMgxF3:Yb3+@NaMgF3:Yb3+ can obviously enhance near-infrared upconversion luminescence of Mn2+, that may find high potential in multiple high-resolution imaging applications. Postprint |
| Databáze: | OpenAIRE |
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