Luminescence investigation of Yb3+/Er3+ codoped single LiYF4 microparticle

Gao, Wei; Zheng, H.; He, Enjie; Lu, Ying; Gao, Fangqi

doi:10.1016/j.jlumin.2013.10.046

Cited by 28 publications

(16 citation statements)

References 26 publications

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“…Liu's group demonstrated that energy clusters at the sublattice level in KYb 2 F 7 : Er nanocrystals dramatically enhanced the violet UC emission of Er 3+ . In addition, tetragonal phase LiYF 4 is a comparable host material with hexagonal NaYF 4 for lanthanide ions . After investigation of the tetragonal phase LiYF 4 lattice structure, we found that each Y 3+ was surrounded by four Y 3+ with shorter distance 0.371 nm that is good for energy transfer among them, while the distance among other neighboring Y 3+ were 0.5155 nm, 0.6466 nm and 0.8416 nm, which were larger than 0.4 nm and propitious to inhibit energy relaxation, as shown in Figure .…”

Section: Introductionsupporting

confidence: 53%

“…The grains are uniform and dispersed well with the size of about 2 μm. The grains of LiYF 4 : Yb, Tm MCs are octahedron with smooth surfaces that are different with the previously reported LiYF 4 : Yb, Er in the absence of EDTA . The size and morphology of LiYF 4 : Yb 3+ , Tm 3+ MCs are not changing distinctly with the rising of Yb 3+ concentration.…”

Section: Resultsmentioning

confidence: 99%

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Sublattice Energy Cluster Construction for The Enhancement of NIR Photocatalytic Performance of LiYF₄: Tm@TiO₂

et al. 2019

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In this work, a stratagem of improving the photocatalytic performance of TiO 2 under NIR irradiation was illustrated by the combination of TiO 2 with upconversion (UC) luminescent materials that present high intensity of UV band emission resulted from the sublattice energy clusters in tetragonal LiYF 4 : Tm UC matrix. The sublattice energy clusters were constructed by doping high concentration Yb 3 + into tetragonal LiYF 4 : Tm. 347 nm emission intensity of Tm 3 + were enhanced dramatically with the rising of Yb 3 + doping concentration and reached the top while 70% Yb 3 + was doped, and the intensity was enhanced about 6.15 times compared with that of the usual 20% Yb 3 + doped. After being coated with TiO 2 , the photocatalytic performance of the complex was enhanced about 2.55 folds compared to P25. XRD, SEM, TEM, FTIR, UV-vis and fluorescence spectrum were employed for the systematical investigation of the relationship between structure and performance. This stratagem may be helpful for the design and preparation of photocatalysts and photo sensors.[a] Y.

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Section: Introductionsupporting

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Sublattice Energy Cluster Construction for The Enhancement of NIR Photocatalytic Performance of LiYF₄: Tm@TiO₂

et al. 2019

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“…Liu's group has reported that Yb 3+ /(Er 3+ , Tm 3+ , Ho 3+ )-doped LiYF 4 nanocrystals show superior UC fluorescence [30]. Meanwhile, our group has also synthesized LiYF 4 :Yb 3+ /(Er 3+ , Pr 3+ ) microcrystals (MCs) and obtained strong UC luminescence [31][32][33]. Similar to NaLuF 4 crystal, the LiLuF 4 crystal would become a potential UC emission host material.…”

Section: Introductionmentioning

confidence: 99%

Multicolor upconversion emission of lanthanide-doped single LiYF4 and LiLuF4 microcrystal

Gao

Dong

Wang

et al. 2017

Materials Research Bulletin

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Yb 3+ /Ln 3+ co-doped LiYF 4 and LiLuF 4 microcrystals (MCs) are synthesized by a facile hydrothermal method. The upconversion (UC) luminescence properties of single LiYF 4 and LiLuF 4 :Yb 3+ /Ln 3+ MC are studied by a confocal microscopy setup under NIR 980 nm laser excitation. The single LiLuF 4 MC displays stronger UC emission intensity than that of single LiYF 4 MC, which is due to the varied site symmetry of the crystal field. The possible UC mechanism, the influence of surface properties and excitation positions on the UC luminescence emission are also investigated. Investigating the luminescence properties of a single particle can effectively avoid environmental influence, achieve selective targeting excitation, and provide precise information for studying the luminescence mechanism of Ln 3+ ions.

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“…17 It is also reported that the use of ethylenediamine tetraacetic acid (EDTA) can greatly influence the surface morphology and the structure of LiYF 4 . 18,19 In this paper, we reported the effect of the mother solution pH value on the precipitation of Yb 3+ -Er 3+ codoped LiYF 4 and YF 3 nanoparticles, as well as the microstructure evaluation of YF 3 , by using a modified solvothermal method. With the same solution composition but gradually reduced pH values, the YF 3 nanoparticles rather than LiYF 4 nanoparticles were precipitated, and the microstructures of YF 3 gradually evolve from a bowknot-like to a spindle-like shape.…”

Section: Introductionmentioning

confidence: 99%

pH value manipulated phase transition, microstructure evolution and tunable upconversion luminescence in Yb³⁺–Er³⁺ codoped LiYF₄/YF₃ nanoparticles

Jiang

et al. 2015

Dalton Trans.

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The pH value plays an important role in controlling the crystallization process and microstructure of the final products in the synthesis of nanocrystals with a solvothermal method. This work reported the effect of the mother solution pH value on the precipitation of LiYF4 and YF3 nanoparticles, as well as the microstructure evaluation of YF3 from a bowknot-like to spindle-like shape. Spectroscopy study suggests that there is strong correlation between the upconversion emission properties of the Yb(3+)-Er(3+) couple and the phase and the microstructure of the host. The strongest emissions and lowest red-to-green ratio are observed in the bowknot-like YF3 nanocrystals with the largest open ends. Further spectral investigation indicates that the phase and microstructure dependent upconversion properties are associated with the upconversion efficiency. The present study is of great importance in the design and synthesis of rare earth ion doped nanocrystals with tunable upconversion properties.

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Luminescence investigation of Yb3+/Er3+ codoped single LiYF4 microparticle

Cited by 28 publications

References 26 publications

Sublattice Energy Cluster Construction for The Enhancement of NIR Photocatalytic Performance of LiYF₄: Tm@TiO₂

Sublattice Energy Cluster Construction for The Enhancement of NIR Photocatalytic Performance of LiYF₄: Tm@TiO₂

Multicolor upconversion emission of lanthanide-doped single LiYF4 and LiLuF4 microcrystal

pH value manipulated phase transition, microstructure evolution and tunable upconversion luminescence in Yb³⁺–Er³⁺ codoped LiYF₄/YF₃ nanoparticles

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Luminescence investigation of Yb3+/Er3+ codoped single LiYF4 microparticle

Cited by 28 publications

References 26 publications

Sublattice Energy Cluster Construction for The Enhancement of NIR Photocatalytic Performance of LiYF4: Tm@TiO2

Sublattice Energy Cluster Construction for The Enhancement of NIR Photocatalytic Performance of LiYF4: Tm@TiO2

Multicolor upconversion emission of lanthanide-doped single LiYF4 and LiLuF4 microcrystal

pH value manipulated phase transition, microstructure evolution and tunable upconversion luminescence in Yb3+–Er3+ codoped LiYF4/YF3 nanoparticles

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Sublattice Energy Cluster Construction for The Enhancement of NIR Photocatalytic Performance of LiYF₄: Tm@TiO₂

Sublattice Energy Cluster Construction for The Enhancement of NIR Photocatalytic Performance of LiYF₄: Tm@TiO₂

pH value manipulated phase transition, microstructure evolution and tunable upconversion luminescence in Yb³⁺–Er³⁺ codoped LiYF₄/YF₃ nanoparticles