An efficient synthetic strategy for uniform perovskite core-shell nanocubes NaMgF3:Mn2+, Yb3+@NaMgF3:Yb3+ with enhanced near infrared upconversion luminescence
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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.
Ding , S , Yang , X F , Song , E H , Liang , C L , Zhou , B , Wu , M M , Zhou , W & Zhang , Q Y 2018 , ' An efficient synthetic strategy for uniform perovskite core-shell nanocubes NaMgF 3 :Mn2 + , Yb 3+ @NaMgF 3 :Yb 3+ with enhanced near infrared upconversion luminescence ' , Journal of Materials Chemistry C , vol. 6 , no. 9 , pp. 2342-2350 . https://doi.org/10.1039/C7TC05416E
Journal of Materials Chemistry C
Copyright © 2018, The Royal Society of Chemistry This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/ 10.1039/C7TC05416E
DescriptionThis work is financially supported by the National Natural Science Foundation of China (Grant No. 51125005, 51472088, 51602104).
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