Upconversion fluorescence of Er3+ trace impurity ions and Raman study in K2YF5:0.1 mol% Tm3+ single crystal

Wang, Dianyuan; Yin, Min; Xia, Shuang; Makhov, V.N.; Хайдуков, Н.М.; Krupa, J.C.

doi:10.1016/j.jallcom.2003.08.061

Cited by 30 publications

(13 citation statements)

References 18 publications

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“…The photoluminescence has green colour for all samples. As expected, all the emission features are much broader than typically observed for crystals [10,11,12]. The reason of such effect we discussed in introduction.…”

supporting

confidence: 67%

Spectroscopic properties of Y₃TaO₇powders activated with Eu, Er and co-activated with Yb

Walasek

Zych

Liu

et al. 2007

J. Phys.: Conf. Ser.

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Abstract.A new synthesis method of Y 3 TaO 7 is reported. Pure phase powders were prepared by modified Pechini technique. Precursors obtained through that route were heated at the temperature about 1000ºC with or without use of Li 2 SO 4 flux. That implicates in different morphology of specimens and also their spectroscopic properties. Eu ions were used as a spectroscopic probe to prove inhomogeneous broadening of excitation and emission spectra. Samples with Er and Yb doping are also presented. Photoluminescence and up-conversion emissions, under 378 nm and 980 nm excitation respectively, strongly depend on the method of powders synthesis.

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supporting

confidence: 67%

Spectroscopic properties of Y₃TaO₇powders activated with Eu, Er and co-activated with Yb

Walasek

Zych

Liu

et al. 2007

J. Phys.: Conf. Ser.

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“…5 Finally, the structure around 670 nm appears due to 4 F 9/2 -4 I 15/2 radiative transitions. As expected, all the emission features are much broader than those typically observed in Er 3+ -doped crystals [15][16][17]. The existence of inhomogeneous broadening, discussed above, is obvious.…”

Section: Ersupporting

confidence: 77%

Synthesis, morphology and spectroscopy of cubic Y3NbO7:Er

Walasek¹,

Zych²,

Zhang³

et al. 2007

Journal of Luminescence

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Synthesis of Y 3 NbO 7 :Er powders with the aid of Li 2 SO 4 flux is reported and spectroscopic properties of the resultant powders are presented. The dopant content varied in the range of 0.1-15 at%. The materials crystallized in the fluorite-type cubic structure in which all the metal ions-Y, Nb, and Er-randomly occupy the same site offered by the host lattice and the O-vacancy is also randomly distributed within the metal surrounding. Transmission electron microscopy images revealed that the agglomeration of particles is very low and the sizes of the grains are around 500 nm. Selected area electron diffraction patterns proved that each grain is monocrystalline. Absorption, excitation, and emission spectra are characterized by relatively broad structures related to the Er 3+ ion. The broadening results from some inhomogeneity of the activator ion surroundings related to the specific structure of the host lattice. When the Er content is only 0.1% both photoluminescence and up-converted emission are dominated by a green luminescent band around 550 nm. However, the efficiency of up-conversion is very low . With increasing concentration of the dopant, a red band located around 665 nm appears and becomes systematically stronger. In up-converted emission, the intensity of the red band surpasses the green one when the Er concentration exceeds 5%. For low concentrations, the up-conversion occurs through a sequential absorption of two infrared (IR) (980 nm) photons from the excitation beam by Er 3+ ion through excited-state absorption mechanism. For higher concentrations, the energy transfer between two neighboring excited Er ions plays dominant role. Surprisingly, the mechanism of up-converted low-intensity luminescence from 2 H 11/2 state seems to diverge from the mechanism characteristic for the 4 S 3/2 level, which conclusion comes from different slopes of the double-log relationships. r

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“…4. Note that all emission features are much broader than those typically observed in emissions of a crystal environment [11][12][13]. This we ascribe to an inhomogeneous broadening resulting from the specific structure of the host material.…”

Section: Resultsmentioning

confidence: 68%

Synthesis and up-converted luminescence of Y3NbO7:Er

et al. 2007

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Synthesis of cubic Y 3 NbO 7 :Er using Li 2 SO 4 flux is reported and spectroscopic properties of the resultant powders are presented. The dopant content has varied in the range of 0.1-15 at.%. Absorption, excitation and emission spectra are characterized by relatively broad structures related to the Er 3+ ion. The broadening results from some inhomogeneity of the metal surrounding. For diluted samples both photoluminescence and up-converted emission are dominated by a green luminescent band around 550 nm. With an increasing concentration of the dopant a red band located around 665 nm gets systematic enhancement and in up-conversion it finally dominates the spectrum. For low concentrations the up-conversion occurs through excited state absorption mechanism while for higher Er contents energy transfer mechanism dominates.

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Upconversion fluorescence of Er3+ trace impurity ions and Raman study in K2YF5:0.1 mol% Tm3+ single crystal

Cited by 30 publications

References 18 publications

Spectroscopic properties of Y₃TaO₇powders activated with Eu, Er and co-activated with Yb

Spectroscopic properties of Y₃TaO₇powders activated with Eu, Er and co-activated with Yb

Synthesis, morphology and spectroscopy of cubic Y3NbO7:Er

Synthesis and up-converted luminescence of Y3NbO7:Er

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Upconversion fluorescence of Er3+ trace impurity ions and Raman study in K2YF5:0.1 mol% Tm3+ single crystal

Cited by 30 publications

References 18 publications

Spectroscopic properties of Y3TaO7powders activated with Eu, Er and co-activated with Yb

Spectroscopic properties of Y3TaO7powders activated with Eu, Er and co-activated with Yb

Synthesis, morphology and spectroscopy of cubic Y3NbO7:Er

Synthesis and up-converted luminescence of Y3NbO7:Er

Contact Info

Product

Resources

About

Spectroscopic properties of Y₃TaO₇powders activated with Eu, Er and co-activated with Yb

Spectroscopic properties of Y₃TaO₇powders activated with Eu, Er and co-activated with Yb