An efficient synthetic strategy for uniform perovskite core–shell nanocubes NaMgF3:Mn2+, Yb3+@NaMgF3:Yb3+ with enhanced near infrared upconversion luminescence. Issue 9 (15th February 2018)

• Record Type: Journal Article
• Authors: Ding, S.; Yang, X. F.; Song, E. H.; Liang, C. L.; Zhou, B.; Wu, M. M.; Zhou, W. Z.; Zhang, Q. Y.
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 9(2018)
• Page Start: 2342
• Page End: 2350
• Publication Date: 2018-02-15
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc05416e
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Uniform perovskite core–shell nanocubes NaMn1− x Mg x F3 @NaMgF3 and NaMn1− x Mg x F3 :Yb 3+ @NaMgF3 :Yb 3+ have been successfully synthesized via a facile one-pot co-precipitation method at room temperature. Abstract : Uniform perovskite core–shell nanocubes NaMn1− x Mg x F3 @NaMgF3 and NaMn1− x Mg x F3 :Yb 3+ @NaMgF3 :Yb 3+ 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 consist of aggregation of precursor molecules/ions, multiple nucleation, surface re-crystallization and further phase transformation. In addition, the DFT calculations further showed that Mn 2+ ions tend to aggregate in NaMgF3 :Mn 2+, which may be one of the important intrinsic factors for the formation of the unique NaMn1− x Mg x F3 @NaMgF3 structure in this case. Besides, the unique core–shell structures NaMn1− x Mg x F3 :Yb 3+ @NaMgF3 :Yb 3+ can obviously enhance the near-infrared upconversion luminescence of Mn 2+, which may find high potential in multiple high-resolution imaging applications.