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- W2133702942 abstract "The upconversion luminescence (UCL) of rare earth (RE) ions doped nanomaterials has attracted extensive interest because of its wide and great potential applications. However, the lower UCL efficiency is still an obstacle for real applications. Photonic modulation is a novel way to improve the efficiency of UCL. In this work, NaGd(WO4)2:Yb3+/Tm3+ inverse opal photonic crystals (IOPCs) were fabricated through the polymethylmethacrylate (PMMA) template and the modification of the IOPC structure on the emission spectra and dynamics of Tm3+ ions was systemically studied. It is interesting to observe that in the IOPCs, the high-order UCL 1D2–3H6/3F4 was relatively enhanced. At the same time, the local thermal effect induced by laser irradiation was suppressed. Furthermore, the overall intensity ratio of visible UCL to near-infrared (NIR) down-conversion luminescence (DCL) was 2.8–8 times improved than that of the grinded reference (REF) and independent of the photonic stop band (PSB). The studies on UCL dynamics indicated that the nonradiative transition rate of Tm3+ was considerably suppressed. The facts above indicated that in the IOPCs the UCL efficiency of Tm3+ was largely improved due to the periodic macroporous structure." @default.
- W2133702942 created "2016-06-24" @default.
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- W2133702942 date "2015-01-01" @default.
- W2133702942 modified "2023-10-17" @default.
- W2133702942 title "Highly improved upconversion luminescence in NaGd(WO<sub>4</sub>)<sub>2</sub>:Yb<sup>3+</sup>/Tm<sup>3+</sup>inverse opal photonic crystals" @default.
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- W2133702942 doi "https://doi.org/10.1039/c4nr05688d" @default.
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