Growth of YbF3-doped CaF2 crystals and characterization of Yb3+/Yb2+ conversion

Nicoarǎ, Irina; Stef, Marius; Pruna, Andreea

doi:10.1016/j.jcrysgro.2007.11.066

Cited by 32 publications

(17 citation statements)

References 20 publications

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“…Similar studies on Yb 2 + have been conducted by Xie et al [34]. The 548 nm emission in our case arises from excited levels of Yb 2 + ion as reported earlier [25,35]. The lifetime of levels responsible for the 442 and 548 nm bands are measured to be 230 and 270 ms at 20 K temperature indicating their distinctly different origins.…”

Section: Down Conversion Fluorescence Studiessupporting

confidence: 88%

Up and down conversion fluorescence studies on combustion synthesized Yb3+/Yb2+: MO-Al2O3 (M=Ca, Sr and Ba) phosphors

Verma

Rai²,

Kumar

et al. 2010

Journal of Luminescence

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Section: Down Conversion Fluorescence Studiessupporting

confidence: 88%

Up and down conversion fluorescence studies on combustion synthesized Yb3+/Yb2+: MO-Al2O3 (M=Ca, Sr and Ba) phosphors

Verma

Rai²,

Kumar

et al. 2010

Journal of Luminescence

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“…In addition, the growth mechanism of a fluorite crystal in aqueous solution was extensively studied in relation to the fabrication of optical components [35][36][37][38], formation of tooth enamel [39,40] and biomineralization [41][42][43][44][45][46]. Thus, the theoretical basis for atomistic molecular dynamics (MD) simulation of the fluorite-water interface was relatively well-established.…”

Section: Introductionmentioning

confidence: 99%

Influence of ions on two-dimensional and three-dimensional atomic force microscopy at fluorite–water interfaces

et al. 2017

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Abstract. Recent advancement in liquid-environment atomic force microscopy (AFM) has enabled us to visualize three-dimensional (3D) hydration structures as well as two-dimensional (2D) surface structures with subnanometer-scale resolution at solid-water interfaces. However, the influence of ions present in solution on the 2D-and 3D-AFM measurements has not been well understood. In this study, we perform atomic-scale 2D-and 3D-AFM measurements at fluorite-water interfaces in pure water and supersaturated solution of fluorite. The images obtained in these two environments are compared to understand the influence of the ions in solution on these measurements. In the 2D images, we found clear difference in the nanoscale structures but no significant difference in the atomic-scale contrasts. However, the 3D force images show clear difference in the subnanometer-scale contrasts. The force contrasts measured in pure water largely agree with those expected from the molecular dynamics simulation and the solvent tip approximation model. In the supersaturated solution, an additional force peak is observed over the negatively charged fluorine ion site. This location suggests that the observed force peak may originate from cations adsorbed on the fluorite surface. These results demonstrate that the ions can significantly alter the subnanometer-scale force contrasts in the 3D-AFM images.

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“…The obtained crystal is transparent and colorless. In order to obtain high Yb 3+ -Yb 2+ conversion in the as-grown crystal a special procedure has been used, same as in the case of CaF 2 host [5].…”

Section: Methodsmentioning

confidence: 99%

Segregation coefficient of Yb3+ and Yb2+ ions in YbF3 doped BaF2 crystals

Nicoarǎ¹,

Buşe²,

Bunoiu³

2014

AIP Conference Proceedings

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Abstract. BaF 2 :0.17 mol%YbF 3 crystal was grown using the conventional Bridgman technique. The optical absorption spectra reveal the existence of both Yb 2+ and Yb 3+ ions with the characteristic bands of the trivalent ions in the near-IR region and of the divalent ions in the UV spectral domain. The concentration distribution of the Yb 2+ and Yb 3+ ions among the sample was investigated using the optical absorption method. The segregation coefficient of the two types of Yb ions has been determined. From our calculations the segregation coefficient of the Yb 3+ ions in BaF 2 host is ≈ 0.7, and of the Yb 2+ ions is ≈ 0.6.

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Growth of YbF3-doped CaF2 crystals and characterization of Yb3+/Yb2+ conversion

Cited by 32 publications

References 20 publications

Up and down conversion fluorescence studies on combustion synthesized Yb3+/Yb2+: MO-Al2O3 (M=Ca, Sr and Ba) phosphors

Up and down conversion fluorescence studies on combustion synthesized Yb3+/Yb2+: MO-Al2O3 (M=Ca, Sr and Ba) phosphors

Influence of ions on two-dimensional and three-dimensional atomic force microscopy at fluorite–water interfaces

Segregation coefficient of Yb3+ and Yb2+ ions in YbF3 doped BaF2 crystals

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