Enhancement of the red upconversion luminescence in NaYF4:Yb3+, Er3+ nanoparticles by the transition metal ions doping

Hu, Yanbo; Liang, Xuhua; Wang, Yongbo; Liu, Enzhou; Hu, Xiaoyun; Fan, Jing

doi:10.1016/j.ceramint.2015.07.171

Cited by 42 publications

(22 citation statements)

References 28 publications

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“…may also alter the ion distribution in the host lattice. 32,33 Nanoparticle synthesis is a trivial process in which the formation of surface quenchers occurs spontaneously and subsequently amounts to added channels for unwanted energy transfer (type ii and iii). 34,35 For example, the unexpected incorporation of hydroxyl ions (OH − ) into nanoparticles could reduce upconversion conversion efficiency.…”

Section: Upconversion Mechanismmentioning

confidence: 99%

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Energy-Transfer Editing in Lanthanide-Activated Upconversion Nanocrystals: A Toolbox for Emerging Applications

Qin

et al. 2019

ACS Cent. Sci.

139

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Advanced nanoscale synthetic techniques provide a versatile platform for programmable control over the size, morphology, and composition of nanocrystals doped with lanthanide ions. Characteristic upconversion luminescence features originating from the 4f–4f optical transitions of lanthanides can be achieved through predesigned energy transfer pathways, enabling wide applications ranging from ultrasensitive biological detection to advanced spectroscopic instrumentation with high spatiotemporal resolution. Here, we review recent scientific and technological discoveries that have prompted the realization of these peculiar functions of lanthanide-doped upconversion nanocrystals and discuss the mechanistic studies of energy transfer involved in upconversion processes. These advanced schemes include cross relaxation-mediated depletion, multipulse sequential pumping, and nanostructural configuration design. Our emphasis is placed on disruptive technologies such as super-resolution microscopy, optogenetics, nanolasing, and optical anticounterfeiting, which take full advantage of the upconversion nanophenomena in relation to lanthanide-doped nanocrystals.

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Section: Upconversion Mechanismmentioning

confidence: 99%

“…The intercalation of additional metal ions (Cd 2+ , Mn 2+ , Fe 3+ , etc.) may also alter the ion distribution in the host lattice. , …”

Section: Fundamentalsmentioning

confidence: 99%

Energy-Transfer Editing in Lanthanide-Activated Upconversion Nanocrystals: A Toolbox for Emerging Applications

Qin

et al. 2019

ACS Cent. Sci.

139

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“…Similarly, in case of NaYF4 doped with Yb 3+ and Er 3+ , co-doping with 0.5mol % of Li + produced green emission of 34 fold intensity and red emission of 101 fold intensity [4]; But co-doping with 10mol % Mo 3+ , the green emission and red emissions became 6 fold and 8 fold respectively [5]; with 15mol % Cr 3+ green emissions and red emission became 16 and 7 times [6] and with 20 mol % La 3+ , green and red emission intensity became 7.6 and 8.1 times respectively (Junxiang Fu, 2017) and with 7mol % of Cd 2+ total emission intensity increased 38 times [7]. Yahong Hu et al shows that the red emission luminance intensity of NaYF4:Yb 3+ , Er 3+ becomes 14-fold on adding 10mol % of Mo 3+ and 24fold on adding 30mol % Fe 3+ [8]. 20mol % co-doping with Fe 3+ showed 7 times increase in red emission [9].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Metallic Ions on the Enhanced Upconversion Emission of NaGdF4 Nanostructures

Muraleedharan¹,

Zhang²

2020

Proceedings of the 4th International Conference on Theoretical and Applied Nanoscience and Nanotechnology (TANN'20)

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Co-doping of NaGdF4 doped with Yb 3+ and Er 3+ with Fe 3+ have shown to improve the intensity of upconversion emissions of green and red wavelengths. The maximum emission intensity was obtained at a Fe concentration of 0.3 mmols in the precursor and using a laser excitation at 980nm wavelength. The green emission was found to be enhanced to 10 times and red emissions was enhanced to about 3 times as compared to the intensity of the emissions without the Fe co-doping. Characterisation techniques like XRD and EDS is used to investigate the reason for this observation.

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“…The sensitizer excites with the absorption of incident light energy and transfers the same to the activator from where high-energy light emits . Ytterbium is the most common sensitizer, and the combination with erbium or holmium leads to green light emission and with thulium can produce blue light. , Lithium or transition-metal ions like manganese or iron codoping along with the Yb 3+ /Er 3+ or Yb 3+ /Ho 3+ combination lead to red emission. ,− …”

Section: Introductionmentioning

confidence: 99%

Enhancement of Luminescence Intensity in Red Emitting NaYF₄:Yb/Ho/Mn Upconversion Nanophosphors by Variation of Reaction Parameters

et al. 2017

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In the field of biomedicine, upconversion nanoparticles have wide ranging applications from bioimaging to targeted cargo delivery, especially due to their excellent chemical and optical properties in comparison with conventional fluorophores. However, their use in biomedical applications is largely hindered due to strong absorption of short wavelength (<600 nm) light by biological tissues/cells and feeble luminescence. Hence, it is important to develop new strategies to increase the long wavelength (red) emission efficiency. In this work, we report an effective strategy to improve the red luminescence efficiency of NaYF4:Yb/Ho/Mn upconversion nanophosphors by varying the reaction conditions. The influence of different synthesis parameters, such as solvent ratio, reaction temperature, and reaction time, on the luminescence, crystal phase, and morphology of the upconversion nanophosphors has been studied in detail and optimized. The improvement in the crystallinity of nanophosphors is claimed as the main origin for the increase in the red emission intensity. This work could pave way for the versatile use of these bright red emitting upconversion nanophosphors in biomedical applications.

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Enhancement of the red upconversion luminescence in NaYF4:Yb3+, Er3+ nanoparticles by the transition metal ions doping

Cited by 42 publications

References 28 publications

Energy-Transfer Editing in Lanthanide-Activated Upconversion Nanocrystals: A Toolbox for Emerging Applications

Energy-Transfer Editing in Lanthanide-Activated Upconversion Nanocrystals: A Toolbox for Emerging Applications

The Effect of Metallic Ions on the Enhanced Upconversion Emission of NaGdF4 Nanostructures

Enhancement of Luminescence Intensity in Red Emitting NaYF₄:Yb/Ho/Mn Upconversion Nanophosphors by Variation of Reaction Parameters

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Enhancement of the red upconversion luminescence in NaYF4:Yb3+, Er3+ nanoparticles by the transition metal ions doping

Cited by 42 publications

References 28 publications

Energy-Transfer Editing in Lanthanide-Activated Upconversion Nanocrystals: A Toolbox for Emerging Applications

Energy-Transfer Editing in Lanthanide-Activated Upconversion Nanocrystals: A Toolbox for Emerging Applications

The Effect of Metallic Ions on the Enhanced Upconversion Emission of NaGdF4 Nanostructures

Enhancement of Luminescence Intensity in Red Emitting NaYF4:Yb/Ho/Mn Upconversion Nanophosphors by Variation of Reaction Parameters

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Enhancement of Luminescence Intensity in Red Emitting NaYF₄:Yb/Ho/Mn Upconversion Nanophosphors by Variation of Reaction Parameters